All The Claims

1. A strobe notification device for use in an alarm system, the strobe notification device comprising:
a communication interface;
a strobe element; and
a controller in communication with the communication interface and the strobe element, the controller configured to:
determine a candela setting programmed for the strobe notification appliance, the programmed candela setting selected from a plurality of available candela settings;
receive an indication of an environmental condition;
select, based on the indication of the environmental condition, at least one aspect of operation of the strobe element such that the strobe element operates at least at the programmed candela setting;
receive, via the communication interface, a command to activate the strobe element; and
in response to receiving the command, use the selected at least one aspect in order to control the strobe element to operate the strobe element at least at the programmed candela setting.
2. The strobe notification device of claim 1, further comprising a sensor, the sensor in communication with the controller and configured to sense the indication of the environmental condition.
3. The strobe notification device of claim 2, wherein the controller is configured to select at least one aspect of operation of the strobe element by selecting, based on the environmental condition, intensity and duration of the pulse to generate an output of the strobe element to equal the programmed candela setting; and
wherein the controller is configured to use the selected at least one aspect by controlling the strobe element for the intensity and the duration of the pulse to equal the programmed candela setting.
4. The strobe notification device of claim 3, wherein the sensor is configured to sense an indication of ambient light; and
wherein the controller is configured to select the intensity and the duration of a pulse, from a plurality of intensities and a plurality of durations, based on the indication of ambient light and the programmed candela setting.
5. The strobe notification device of claim 4, wherein the controller is configured to select the intensity and the duration of a pulse by:
comparing the indication of ambient light with at least one threshold; and
accessing a look-up table using as inputs the programmed candela setting and the comparison of the indication of ambient light with at least one threshold.
6. The strobe notification device of claim 5, wherein the controller is further configured to receive, from a fire alarm panel, the look-up table.
7. The strobe notification device of claim 2, wherein the indication of the environmental condition comprises an indication of ambient light; and
wherein the controller is configured to select the intensity and the duration of a pulse by:
comparing the indication of ambient light with a threshold;
in response to the indication of ambient light being greater than the threshold, selecting a first drive current and a first duration;
in response to the indication of ambient light being less than the threshold,

selecting a second drive current and a second duration;
wherein the first drive current is greater than the second drive current;
wherein the first duration is shorter than the second duration;
wherein the strobe element driven at the first drive current for the first duration equals the programmed candela setting; and
wherein the strobe element driven at the second drive current for the second duration equals the programmed candela setting.
8. The strobe notification device of claim 1, further comprising a multi-position switch, the multi-position switch in communication with the controller; and
wherein the controller is configured to determine the programmed candela setting for the strobe notification appliance by communicating with the multi-position switch to determine its setting.
9. The strobe notification device of claim 2, wherein the controller is configured to select at least one aspect of operation of the strobe element by selecting, based on the environmental condition, intensity, duration of the pulse, or pulse width modulation to generate an output of the strobe element to be greater than the programmed candela setting; and
wherein the controller is configured to use the selected at least one aspect by controlling the strobe element for the intensity and the duration of the pulse to be greater than the programmed candela setting.
10. The strobe notification device of claim 9, wherein the controller is configured to select, based on the indication of the environmental condition, an environmental candela setting, the environmental candela setting being greater than the programmed candela setting and selected from the plurality of available candela settings; and
wherein the controller is configured to control the strobe element for the intensity and the duration of the pulse to be greater than the programmed candela setting by controlling the strobe element to operate at the environmental candela setting.
11. The strobe notification device of claim 10, wherein the controller is configured to select the environmental candela setting by:
receiving a measurement of ambient light when the strobe is not flashing;
receiving a measurement of ambient light when the strobe is flashing;
comparing the measurement of the ambient light when the strobe is flashing with the measurement of the ambient light when the strobe is not flashing;
determining whether the comparison of the measurement of the ambient light when the strobe is flashing with the measurement of the ambient light when the strobe is not flashing is less than a predetermined margin;
in response to determining that the comparison is less than the predetermined margin, select the environmental candela setting to be greater than the programmed candela setting.
12. The strobe notification device of claim 11, wherein the controller is configured to select the environmental candela setting further by:
in response to determining that the comparison is greater than the predetermined margin, reduce a current candela setting so that the environmental candela setting is no less than the programmed candela setting.
13. A method for operating a strobe notification device used in an alarm system, the method comprising:
determining a candela setting programmed for the strobe notification appliance, the programmed candela setting selected from a plurality of available candela settings;
receiving an indication of an environmental condition;
selecting, based on the indication of the environmental condition, at least one aspect of operation of the strobe element such that the strobe element operates at least at the programmed candela setting;
receiving, via the communication interface, a command to activate the strobe element; and
in response to receiving the command, using the selected at least one aspect in order to control the strobe element to operate the strobe element at least at the programmed candela setting.
14. The method of claim 13, wherein selecting at least one aspect of operation of the strobe element comprises selecting, based on the environmental condition, intensity and duration of the pulse to generate an output of the strobe element to equal the programmed candela setting; and
wherein using the selected at least one aspect comprises controlling the strobe element for the intensity and the duration of the pulse to equal the programmed candela setting.
15. The method of claim 13, wherein the indication of the environmental condition comprises an indication of ambient light; and
wherein selecting the intensity and the duration of a pulse comprises:
comparing the indication of ambient light with a threshold;
in response to the indication of ambient light being greater than the threshold, selecting a first drive current and a first duration;
in response to the indication of ambient light being less than the threshold,

selecting a second drive current and a second duration;
wherein the first drive current is greater than the second drive current;
wherein the first duration is shorter than the second duration;
wherein the strobe element driven at the first drive current for the first duration equals the programmed candela setting; and
wherein the strobe element driven at the second drive current for the second duration equals the programmed candela setting.
16. The method of claim 13, wherein selecting at least one aspect of operation of the strobe element comprises selecting, based on the environmental condition, intensity, duration of the pulse, or pulse width modulation to generate an output of the strobe element to be greater than the programmed candela setting; and
wherein using the selected at least one aspect comprises controlling the strobe element for the intensity, the duration of the pulse or the pulse width modulation to be greater than the programmed candela setting.
17. A strobe notification device for use in an alarm system, the strobe notification device comprising:
a communication interface;
a sensor;
a strobe element; and
a controller in communication with the communication interface, the sensor, and the strobe element, the controller configured to:
receive, from the sensor, an indication of an environmental condition when the strobe element is generating an output;
select, based on the indication of the environmental condition, at least one aspect of operation of the strobe element;
receive, via the communication interface, a command to activate the strobe element; and
in response to receiving the command, using the selected at least one aspect in order to control the strobe element.
18. The strobe notification device of claim 17, wherein the controller is configured to receive an indication of an environmental condition when the strobe element is generating an output by:
determining whether the strobe element is generating the output; and
in response to determining that the strobe element is generating the output, the controller is configured to save the indication of the environmental condition sent from the sensor.
19. The strobe notification device of claim 18, wherein the controller is configured to determine whether the strobe element is generating the output by determining whether the controller is sending a control signal to the strobe element to generate a flash.
20. The strobe notification device of claim 18, wherein the controller is further configured to, in response to determining that the strobe element is not generating the output, save the indication of the environmental condition sent from the sensor.
21. The strobe notification device of claim 20, wherein the controller is configured to select, based on the indication of the environmental condition, at least one aspect of operation of the strobe element by:
comparing the indication of the environmental condition sent from the sensor when the strobe is flashing with the indication of the environmental condition sent from the sensor when the strobe is not flashing.
22. A method for operating a strobe notification device used in an alarm system, the method comprising:
receiving, from a sensor, an indication of an environmental condition when a strobe element of the strobe notification device is generating an output;
selecting, based on the indication of the environmental condition, at least one aspect of operation of the strobe element;
receive, via the communication interface, a command to activate the strobe element; and
in response to receiving the command, using the selected at least one aspect in order to control the strobe element.
23. The method of claim 22, wherein receiving an indication of an environmental condition when the strobe element is generating an output comprises:
determining whether the strobe element is generating the output; and
in response to determining that the strobe element is generating the output, the controller is configured to save the indication of the environmental condition sent from the sensor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A solid-state image pickup device comprising:
a pixel array area in which pixels each including a photoelectric conversion element are two-dimensionally arranged;
first control unit for performing control such that signals of pixels in a desired region of the pixel array area are sequentially read row by row; and
second control unit for performing control such that, at least some of the pixels in regions except for the desired region are sequentially reset row by row, and further wherein the reset operation is performed such that reset of any rows immediately adjacent the desired region is always performed for a selective read operation thereby ensuring that overflow from rows immediately adjacent the desired region does not interfere with signals from the desired region, wherein the second control unit causes reset of adjacent rows both immediately above and below the rows of pixels in the desired region provided that there are rows of pixels both above and below the desired region.
2. The solid-state image pickup device according to claim 1, wherein the number of rows in the regions is changeable in accordance with external setting.
3. The solid-state image pickup device according to Claim 1, wherein the number of rows of each of the regions is set to half the number of rows of the desired region.
4. The solid-state image pickup device according to claim 2, wherein:
the second control unit includes
calculating unit for calculating a start row and an end row of each of the regions in accordance with information on a start row and an end row of the desired region and information on the number of rows of each of the regions,
an address counter in which counting start and counting end are controlled in accordance with calculation results of the calculating unit, and
an address decode circuit that performs control for a desired row at desired timing in accordance with a count output of the address counter and a timing signal; and

the calculating unit includes
a subtracter that subtracts the number of rows of each of the regions from the start row of the desired region,
an underflow detector that controls the counting start of the address counter when underflow occurs in a subtraction result of the subtracter,
an adder that adds the number of rows of each of the regions to the end row of the desired region, and
an overflow detector that controls the counting end of the address counter when overflow occurs in an addition result of the adder.
5. The solid-state image pickup device according to claim 3, wherein:
the second control unit includes
calculating unit for calculating a start row and an end row of each of the regions in accordance with information on a start row and an end row of the desired region,
an address counter in which counting start and counting end are controlled in accordance with calculation results of the calculating unit, and
an address decode circuit that performs control for a desired row at desired timing in accordance with a count output of the address counter and a timing signal; and

the calculating unit includes
a divider that divides the number of rows of the desired region into half,
a subtracter that subtracts a division result of the divider from the start row of the desired region,
an underflow detector that controls the counting start of the address counter when underflow occurs in a subtraction result of the subtracter,
an adder that adds the division result of the divider to the end row of the desired region, and
an overflow detector that controls the counting end of the address counter when overflow occurs in an addition result of the adder.
6. The solid-state image pickup device according to claim 5, wherein the divider is a shift divider that performs division by bit shift.
7. A solid-state image pickup device comprising:
a pixel array area in which pixels each including a photoelectric conversion element are two-dimensionally arranged;
a first controller that performs control such that signals of pixels in a desired region of the pixel array area are sequentially read row by row; and
a second controller that performs control such that, at least some of the pixels in regions except for the desired region are sequentially reset row by row, and further wherein the reset operation is performed such that reset of any rows immediately adjacent the desired region is always performed for a selective read operation thereby ensuring that overflow from rows immediately adjacent the desired region does not interfere with signals from the desired region, wherein the second control unit causes reset of adjacent rows both immediately above and below the rows of pixels in the desired region provided that there are rows of pixels both above and below the desired region.

1. A computer-implemented method comprising:
identifying, by one or more computing devices, an object in a vehicle’s environment, the object having a heading and location;
generating, by the one or more computing devices, a set of possible actions for the object using map information describing the vehicle’s environment and the heading and location of the object;
generating, by the one or more computing devices, a set of possible future trajectories of the object based on the set of possible actions;
receiving, by the one or more computing devices, contextual information including a status of the detected object;
determining, by the one or more computing devices, a likelihood value of each trajectory of the set of possible future trajectories based on the contextual information;
determining, by the one or more computing devices, a final future trajectory based on the determined likelihood value for each trajectory of the set of possible future trajectories; and
maneuvering, by the one or more computing devices, the vehicle in order to avoid the final future trajectory and the object.
2. The method of claim 1, wherein determining the final future trajectory includes:
comparing the likelihood value for each trajectory of the set of possible future trajectories to a threshold value; and
discarding a trajectory from the set of trajectories when the likelihood value of that trajectory does not meet the threshold value, wherein the likelihood value of the discarded trajectory is not used to determine the final future trajectory.
3. The method of claim 2, wherein determining the final future trajectory includes:
when none of the trajectories of the set of possible future trajectories meet the threshold value, identifying a plurality of waypoints for each trajectory in the set of trajectories, wherein a waypoint includes at least one of a position, a velocity, and a timestamp;
determining a trajectory of the vehicle, wherein the trajectory of the vehicle includes a plurality of waypoints; and
comparing, at a same timestamp, each of the waypoints to a waypoint associated with a trajectory of the vehicle in order to determine the final future trajectory.
4. The method of claim 2, wherein determining the final future trajectory includes:
identifying a situational relationship between the object and the vehicle;
comparing the likelihood value of the trajectories remaining in the set of possible future trajectories to a second threshold different from the first threshold value, and
discarding a second trajectory from the trajectories remaining in the set of possible future trajectories when the likelihood value of that second trajectory does not meet the second threshold value, wherein the likelihood value of the discarded second trajectory is not used to determine the final future trajectory.
5. The method of claim 4, wherein after discarding the second trajectory, the remaining trajectories of the set of possible future trajectories are each identified as final future trajectories, such that maneuvering the vehicle includes avoiding each of the remaining trajectories of the set of possible future trajectories.
6. The method of claim 1, wherein determining the final future trajectory includes selecting a trajectory of the set of possible future trajectories with a highest likelihood value as the final future trajectory.
7. The method of claim 1, wherein generating the set of possible actions includes discarding an action from the set of possible actions for failing to comply with a model of possible actions for the object.
8. The method of claim 1, wherein generating the set of possible actions is further based on a past trajectory of the object.
9. The method of claim 1, wherein the contextual information further describes a status of a second object in the vehicle’s environment.
10. A system comprising one or more computing devices configured to:
identify an object in a vehicle’s environment, the object having a heading and location;
generate a set of possible actions for the object using map information describing the vehicle’s environment and the heading and location of the object;
generate a set of possible future trajectories of the object based on the set of possible actions;
receive contextual information including a status of the detected object;
determine a likelihood value of each trajectory of the set of possible future trajectories based on the contextual information;
determine a final future trajectory based on the determined likelihood value for each trajectory of the set of possible future trajectories; and
maneuver the vehicle in order to avoid the final future trajectory and the object.
11. The system of claim 10, wherein the one or more computing devices are further configured to determine the final future trajectory by:
comparing the likelihood value for each trajectory of the set of possible future trajectories to a threshold value; and
discarding a trajectory from the set of trajectories when the likelihood value of that trajectory does not meet the threshold value, wherein the likelihood value of the discarded trajectory is not used to determine the final future trajectory.
12. The system of claim 11, wherein the one or more computing devices are further configured to determine the final future trajectory by:
when none of the trajectories of the set of possible future trajectories meet the threshold value, identifying a plurality of waypoints for each trajectory in the set of trajectories, wherein a waypoint includes at least one of a position, a velocity, and a timestamp;
determining a trajectory of the vehicle, wherein the trajectory of the vehicle includes a plurality of waypoints; and
comparing, at a same timestamp, each of the waypoints for each trajectory to a waypoint of the trajectory of the vehicle to determine the final future trajectory.
13. The system of claim 11, wherein the one or more computing devices are further configured to determine the final future trajectory by:
identifying a situational relationship between the object and the vehicle;
comparing the likelihood value of the trajectories remaining in the set of possible future trajectories to a second threshold different from the first threshold value, and
discarding a second trajectory from the trajectories remaining in the set of possible future trajectories when the likelihood value of that second trajectory does not meet the second threshold value, wherein the likelihood value of the discarded second trajectory is not used to determine the final future trajectory.
14. The system of claim 13, wherein the one or more computing devices are further configured to, after discarding the second trajectory, identify the remaining trajectories of the set of possible future trajectories as each being final future trajectories, such that maneuvering the vehicle includes avoiding each of the remaining trajectories of the set of possible future trajectories.
15. The system of claim 10, wherein the one or more computing devices are further configured to determine the final future trajectory by selecting a trajectory of the set of possible future trajectories with a highest likelihood value as the final future trajectory.
16. The system of claim 10, wherein the one or more computing devices are further configured to determine the final future trajectory by discarding an action from the set of possible actions for failing to comply with a model of possible actions for the object.
17. The system of claim 10, wherein the one or more computing devices are further configured to generate the set of possible actions further based on a past trajectory of the object.
18. The system of claim 10, wherein the contextual information further describes a status of a second object in the vehicle’s environment.
19. The system of claim 10, wherein the vehicle is an autonomous vehicle.
20. A non-transitory computer-readable medium on which instructions are stored, the instructions, when executed by one or more processors cause the one or more processors to perform a method, the method comprising:
identifying an object in a vehicle’s environment, the object having a heading and location;
generating a set of possible actions for the object using map information describing the vehicle’s environment and the heading and location of the object;
generating a set of possible future trajectories of the object based on the set of possible actions;
receiving contextual information including a status of the detected object;
determining a likelihood value of each trajectory of the set of possible future trajectories based on the contextual information;
determining a final future trajectory based on the determined likelihood value for each trajectory of the set of possible future trajectories; and
maneuvering the vehicle in order to avoid the final future trajectory and the object.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. An optical pickup apparatus configured to apply a light flux to an information recording medium to be rotated and detect the light flux reflected from the information recording medium, comprising:
a first objective lens configured to focus the light flux on the information recording medium;
a second objective lens configured to focus the light flux on the information recording medium;
a lens holder including a first lens barrel having the first objective lens mounted on an end face thereof and a second lens barrel having the second objective lens mounted on an end face thereof;
an actuator unit having the lens holder mounted thereon; and
a housing having the actuator unit mounted thereon, the first objective lens and the second objective lens each being mounted on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a radial direction of the information recording medium,
the actuator unit being mounted on the housing such that an optical axis of the first objective lens is inclined in the radial direction at an inclination angle of the optical axis thereof toward a recording surface of the information recording medium which angle is required to cancel coma aberration of the first objective lens to the recording surface.
2. An optical pickup apparatus configured to apply a light flux to an information recording medium to be rotated and detect the light flux reflected from the information recording medium, comprising:
a first objective lens configured to focus the light flux on the information recording medium;
a second objective lens configured to focus the light flux on the information recording medium;
a lens holder including a first lens barrel having the first objective lens mounted on an end face thereof and a second lens barrel having the second objective lens mounted on an end face thereof;
an actuator unit having the lens holder mounted thereon; and
a housing having the actuator unit mounted thereon,
the first objective lens and the second objective lens each being mounted on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a radial direction of the information recording medium,
the first objective lens being mounted on the lens holder such that an optical axis of the first objective lens toward a recording surface of the information recording medium coincides with an optical axis of the first lens barrel,
the second objective lens being mounted on the lens holder such that an optical axis of the second objective lens is inclined in the radial direction at an angle corresponding to a difference (first inclination angle minus second inclination angle) between a first inclination angle and a second inclination angle, relative to an optical axis of the second lens barrel, the first inclination angle being an inclination angle of the optical axis of the first objective lens required to cancel coma aberration of the first objective lens to the recording surface, the second inclination angle being an inclination angle of the optical axis of the second objective lens toward the recording surface required to cancel coma aberration of the second objective lens to the recording surface (first inclination angle>second inclination angle),
the actuator unit being mounted on the housing such that the optical axis of the first objective lens is inclined in the radial direction at the first inclination angle.
3. An optical pickup apparatus configured to apply a light flux to an information recording medium to be rotated and detect the light flux reflected from the information recording medium, comprising:
a first objective lens configured to focus the light flux on the information recording medium;
a second objective lens configured to focus the light flux on the information recording medium;
a lens holder including a first lens barrel having the first objective lens mounted on an end face thereof and a second lens barrel having the second objective lens mounted on an end face thereof;
an actuator unit having the lens holder mounted thereon; and
a housing having the actuator unit mounted thereon,
the first objective lens and the second objective lens each being mounted on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a direction of a center of rotation of the information recording medium,
the first objective lens being mounted on the lens holder such that an optical axis of the first objective lens toward a recording surface of the information recording medium coincides with an optical axis of the first lens barrel,
the second objective lens being mounted on the lens holder such that an optical axis of the second objective lens is inclined in the direction of the center of rotation at an angle corresponding to a difference (first inclination angle minus second inclination angle) between a first inclination angle and a second inclination angle relative to an optical axis of the second lens barrel, the first inclination angle being an inclination angle of the optical axis of the first objective lens required to cancel coma aberration of the first objective lens to the recording surface, the second inclination angle being an inclination angle of the optical axis of the second objective lens toward the recording surface required to cancel coma aberration of the second objective lens to the recording surface (first inclination angle>second inclination angle),
the actuator unit being mounted on the housing such that the optical axis of the first objective lens is inclined in a direction opposite to the direction of the center of rotation at the first inclination angle.
4. An optical pickup apparatus configured to apply a light flux to an information recording medium to be rotated and detect the light flux reflected from the information recording medium, comprising:
a first objective lens configured to focus the light flux on the information recording medium;
a second objective lens configured to focus the light flux on the information recording medium;
a lens holder including a first lens barrel having the first objective lens mounted on an end face thereof and a second lens barrel having the second objective lens mounted on an end face thereof;
an actuator unit having the lens holder mounted thereon; and
a housing having the actuator unit mounted thereon,
the first objective lens and the second objective lens each being mounted on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a direction opposite to a direction of a center of rotation of the information recording medium,
the first objective lens being mounted on the lens holder such that an optical axis of the first objective lens toward a recording surface of the information recording medium coincides with an optical axis of the first lens barrel,
the second objective lens being mounted on the lens holder such that an optical axis of the second objective lens is inclined in the direction opposite to the direction of the center of rotation at an angle corresponding to a difference (first inclination angle minus second inclination angle) between a first inclination angle and a second inclination angle relative to an optical axis of a second lens barrel, the first inclination angle being an inclination angle of the optical axis of the first objective lens required to cancel the coma aberration of the first objective lens to the recording surface, the second inclination angle being an inclination angle of the optical axis of the second objective lens toward the recording surface required to cancel the coma aberration of the second objective lens to the recording surface (first inclination angle>second inclination angle),
the actuator unit being mounted on the housing such that the optical axis of the first objective lens is inclined in the direction of the center of rotation at the first inclination angle.
5. The optical pickup apparatus of claim 2, wherein
the first inclination angle is an angle obtained based on a mean value of the coma aberrations of a plurality of first objective lenses.
6. The optical pickup apparatus of claim 3, wherein
the first inclination angle is an angle obtained based on a mean value of the coma aberrations of a plurality of first objective lenses.
7. The optical pickup apparatus of claim 4, wherein
the first inclination angle is an angle obtained based on a mean value of the coma aberrations of a plurality of first objective lenses.
8. The optical pickup apparatus of claim 2, wherein
the second objective lens is mounted on the lens holder such that the optical axis of the second objective lens toward the recording surface of the information recording medium coincides with the optical axis of the second lens barrel.
9. The optical pickup apparatus of claim 3, wherein
the second objective lens is mounted on the lens holder such that the optical axis of the second objective lens toward the recording surface of the information recording medium coincides with the optical axis of the second lens barrel.
10. The optical pickup apparatus of claim 4, wherein
the second objective lens is mounted on the lens holder such that the optical axis of the second objective lens toward the recording surface of the information recording medium coincides with the optical axis of the second lens barrel.
11. The optical pickup apparatus of claim 2, wherein
the first objective lens includes an objective lens for BD standard or HD-DVD standard, and wherein
the second objective lens includes an objective lens for the DVDCD standard.
12. The optical pickup apparatus of claim 3, wherein
the first objective lens includes an objective lens for BD standard or HD-DVD standard, and wherein
the second objective lens includes an objective lens for the DVDCD standard.
13. The optical pickup apparatus of claim 4, wherein
the first objective lens includes an objective lens for BD standard or HD-DVD standard, and wherein
the second objective lens includes an objective lens for the DVDCD standard.
14. A method of manufacturing an optical pickup apparatus configured to a light flux to an information recording medium to be rotated and detect the light flux reflected from the information recording medium, the optical pickup apparatus including
a first objective lens configured to focus the light flux on the information recording medium,
a second objective lens configured to focus the light flux on the information recording medium,
a lens holder including a first lens barrel having the first objective lens mounted on an end face thereof and a second lens barrel having the second objective lens mounted on an end face thereof,
an actuator unit having the lens holder mounted thereon, and
a housing having the actuator unit mounted thereon,
the method comprising:
mounting the first objective lens and the second objective lens on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a radial direction of the information recording medium;
mounting the first objective lens on the lens holder such that an optical axis of the first objective lens toward a recording surface of the information recording medium coincides with an optical axis of the first lens barrel;
mounting the second objective lens on the lens holder such that an optical axis of the second objective lens is inclined in the radial direction at an angle corresponding to a difference (first inclination angle minus second inclination angle) between a first inclination angle and a second inclination angle relative to an optical axis of a second lens barrel, the first inclination angle being an inclination angle of the optical axis of the first objective lens required to cancel the coma aberration of the first objective lens to the recording surface, the second inclination angle being an inclination angle of the optical axis of the second objective lens toward the recording surface required to cancel the coma aberration of the second objective lens to the recording surface (first inclination angle>second inclination angle); and
mounting the actuator unit on the housing such that the optical axis of the first objective lens is inclined in the radial direction by the first inclination angle in the radial direction.