1. System for providing a list to a mobile communication device, wherein the system comprises a mobile communication device and a server, and
wherein the mobile communication device comprises a first list of parameters of the activity in said mobile communication device,
wherein the server comprises a second list of parameters of activities of a number of second mobile communication devices,
wherein the mobile communication device is adapted to transmit the first list to the server,
wherein the server is adapted to receive said first list,
wherein the server is adapted to analyse said first list in relation to said second list,
wherein the server is adapted to derive a third list based on said analysis, and
wherein the mobile communication device is adapted to receive said third list.
2. The system according to claim 1, wherein said third list comprises features that can be supplied from the server.
3. The system according to claim 1, wherein said parameters comprises the frequency of the usage of one or more features.
4. The system according to claim 1, wherein said feature is an application to be executed in a mobile communication device.
5. The system according to claim 1, wherein information from the first list is added to the second list.
6. The system according to claim 1, further comprising a second server, wherein the server is adapted to transmit the third list to the second server, and wherein said second server is adapted to update said third list.
7. The system according to claim 1, further comprising a third server, wherein the server is adapted to transmit a result of the analysis to the third server, wherein said third server is adapted to derive the fourth list based on said analysis of said result, and
wherein said third server is adapted to transmit the fourth list to said mobile communication device.
8. A server for deriving a list,
wherein the server is adapted to receive a first list of parameters of activities from a mobile communication device,
wherein the server comprises a second list of parameters of activities of a number of second mobile communication devices,
said server is adapted to analyse said first list in relation to said second list,
said server is adapted to derive a third list based on said analysis,
wherein said server is adapted to transmit said third list.
9. The server according to claim 8, wherein the server is adapted to add information from the first list to the second list.
10. Method for a providing a list in a system comprising a mobile communication device and a server,
the mobile communication device generates a first list of parameters of the activity in said mobile communication device,
the mobile communication device transmits the first list to the server,
the server receives said first list,
the server analyses said first list in relation to a said second list comprising parameters of activities of a number of second mobile communication devices,
the server derives a third list based on said analysis,
and the mobile communication device receives said third list.
11. The method according to claim 10, wherein said third list comprises
features that can be supplied from the server.
12. The method according to claim 10, wherein said parameters comprises the frequency of the usage of one or more features.
13. The method according to claim 10, wherein said feature is an application to be executed in a mobile communication device.
14. The method according to claim 10, wherein information from the first list is added to the second list.
15. The method according to claim 10, wherein the system further comprising a second server, wherein the server transmits the third list to the second server, wherein said second server updates said third list.
16. The method according to claim 10, wherein the system further comprising a third server, wherein the server transmits a result of the analysis to the third server, wherein said third server derives the fourth list based on said analysis of said result,
and wherein third server said transmits the fourth list to said mobile communication device.
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 optoelectronic device comprising:
a light emitter for emitting a light beam on a reflection medium, a light-beam-dividing element having a first diffraction grating region and a second diffraction grating region located in the vicinity of the first diffraction grating region, being located between the light emitter and the reflection medium, and a photodetector for receiving light diffracted at the diffraction grating region of the light-beam-dividing element, among returning light beams reflected by the reflection medium, wherein
an entire light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium, whereby the photodetector receives only a portion of the returning light that passes through the first diffraction grating region,
the second diffraction grating region prevents the portion of the returning light beams which enters the second diffraction grating region from entering the photodetector, where the returning light beams are \xb1first order diffracted light generated when a light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium, and
the second diffraction grating region prevents the light beam emitted from the light emitter from reaching the reflection medium.
2. The optoelectronic device according to claim 1, wherein the second diffraction grating region has a 0th-order diffraction efficiency of light reflected by the reflection medium that is 5% at most.
3. The optoelectronic device according to claim 1, wherein the light-beam-dividing element has a lens at a side opposite to the light emitter, and the second diffraction grating region is provided so as to satisfy the formula:
r>d\xb7tan(sin\u22121(NA))
where \u2018d\u2019 denotes an air conversion distance from a light-emitting point of the light emitter to a face of the light-beam-dividing element where the first diffraction grating region and the second diffraction grating region are formed, NA denotes a numerical aperture at a side of the lens facing the light-beam-dividing element, and \u2018r\u2019 denotes a distance to an arbitrary point P on the second diffraction grating region from an intersection of an optical axis of the light beam provided by the light emitter and a face of the light-beam dividing element at a side with the second diffraction grating region.
4. The optoelectronic device according to claim 1, wherein at least one part of the photodetector is present in a region obtained by projecting the second diffraction grating region along with the optical axis of the returning light beam.
5. The optoelectronic device according to claim 1, wherein the first diffraction grating region and the second diffraction grating region are located adjacent to each other with no spacing.
6. The optoelectronic device according to claim 1, wherein a three-beam-generating diffraction grating is provided in an optical path between the light emitter and the light-beam-dividing element.
7. The optoelectronic device according to claim 6, wherein the three-beam-generating diffraction grating and the light-beam-dividing element are integrated within one optical part.
8. The optoelectronic device according to claim 6, comprising a polarized-light-beam divider for dividing a part of light reflected by the reflection medium, a reflector for reflecting light divided by the polarized-light-beam divider, a polarized-light separator for separating light reflected by the reflector, and a polarization-signal-detecting photodetector for detecting light separated by the polarized-light separator.
9. The optoelectronic device according to claim 8, wherein the polarized-light-beam divider, the reflector and the polarized-light separator are monolithically integrated to form one optical member.
10. The optoelectronic device according to claim 1, wherein the light emitter, the photodetector and the light-beam-dividing element are provided within one single package.
11. The optoelectronic device according to claim 10, wherein the light emitter and the photodetector are integrated on one substrate located inside the package that is sealed with a member provided with the light-beam-dividing element.
12. The optoelectronic device according to claim 11, wherein the light emitter is an end-face light emitter, the substrate has a concavity with a bottom on which the light emitter is located while the side-face of the concavity comprises a mirror inclined by about 45\xb0 with respect to the bottom so as to reflect a light beam emitted from the light emitter.
13. The optoelectronic device according to claim 12, further comprising a monitor for receiving a light beam emitted from the light emitter to a side opposite to the mirror and adjusting output of the light emitter.
14. The optoelectronic device according to claim 11, wherein an integrated circuit for processing an electric signal from the photodetector is mounted on the substrate.
15. An optoelectronic device comprising:
a light emitter for emitting a light beam on a reflection medium, a light-beam-dividing element having a first diffraction grating region and a second diffraction grating region located in the vicinity of the first diffraction grating region, being located between the light emitter and the reflection medium, and a photodetector for receiving light diffracted at the diffraction grating region of the light-beam-dividing element, among returning light beams reflected by the reflection medium, wherein
an entire light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium, whereby the photodetector receives only a portion of the returning light that passes through the first diffraction grating region,
the second diffraction grating region prevents the portion of the returning light beam which enters the second diffraction grating region from entering the photodetector, where the returning light beams are \xb1first order diffracted light generated when a light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium,
the second diffraction grating region has a 0th-order diffraction efficiency of light reflected by the reflection medium that is 5% at most, and
the second diffraction grating region has a convexity and a concavity different from each other in the optical path length by m2 times a wavelength of the reflected light, where m denotes an odd number.
16. An optoelectronic device comprising:
a light emitter for emitting a light beam on a reflection medium;
a light-beam-dividing element having a first diffraction gating region and a second diffraction grating region located in the vicinity of the first diffraction grating region, being located between the light emitter and the reflection medium;
a photodetector for receiving light diffracted at the diffraction grating region of the light-beam-dividing element, among returning light beams reflected by the reflection medium; and
a plurality of photodetectors, each of which is located between a spot of mth-order diffracted light and a spot of (m+1)th-order diffracted light of the returning light beam provided by second diffraction grating region located in an optical axis direction of the returning light beam with respect to the other photodetector, where m denotes an integer,
wherein an entire light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium, whereby the photodetector receives only a portion of the returning light that passes through the first diffraction grating region,
the second diffraction grating region prevents the portion of the returning light beam which enters the second diffraction grating region from entering the photodetector, where the returning light beams are \xb1first order diffracted light generated when a light beam emitted from the light emitter enters the first diffraction grating region and is reflected by the reflection medium, and
the second diffraction grating region has a 0th-order diffraction efficiency of light reflected by the reflection medium that is 5% at most.