1. A lens alignment apparatus for an optical device, comprising:
at least one lens element positioned in a lens body; and
a lens alignment interface coupled to the at least one lens element and configured to permit the at least one lens element to be angularly deflected relative to an axis of symmetry of the lens body.
2. The lens alignment apparatus of claim 1, wherein the lens alignment interface includes a rolling element extending between the at least one lens element and the lens body.
3. The lens alignment apparatus of claim 2, wherein the rolling element is urged against the lens body by an elastic element.
4. The lens alignment apparatus of claim 2, comprising a lens mount that retains the at least one lens element, further wherein the rolling element is urged against the lens mount by an elastic element.
5. The lens alignment apparatus of claim 1, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens body and configured to engage an elongated slot in the lens mount.
6. The lens alignment apparatus of claim 1, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens mount and configured to engage an elongated slot in the lens body.
7. A lens alignment apparatus for an optical device, comprising:
at least one lens element positioned in a lens body and configured to resolve an image on an imaging plane; and
a lens alignment interface coupled to the at least one lens element and configured to permit the at least one lens element to be angularly adjustable relative to an axis of symmetry of the lens body to improve image resolution in a selected location on the imaging plane.
8. The lens alignment apparatus of claim 7, wherein the lens alignment interface includes a rolling element extending between the at least one lens element and the lens body.
9. The lens alignment apparatus of claim 8, wherein the lens alignment interface includes an elastic element configured to urge the rolling element against the lens body.
10. The lens alignment apparatus of claim 8, comprising a lens mount that retains the at least one lens element, wherein the rolling element is urged against the lens mount by an elastic element.
11. The lens alignment apparatus of claim 7, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens body and configured to engage an elongated slot in the lens mount.
12. The lens alignment apparatus of claim 7, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens mount and configured to engage an elongated slot in the lens body.
13. A method of improving the resolution of an optical device, comprising:
translating a lens along an optical axis to maximize resolution at a first location on an imaging plane;
determining a resolution in a second location in the imaging plane;
improving the resolution in the second location by angularly deflecting the lens; and
fixing the position of the lens.
14. The method of claim 13, wherein translating a lens along an optical axis to maximize resolution at a first location comprises maximizing the resolution at a center location of the imaging plane.
15. The method of claim 14, wherein maximizing the resolution at a center location of the imaging plane comprises maximizing the value of a modulation transfer function (MTF) at the center location.
16. The method of claim 13, wherein determining a resolution in a second location in the imaging plane comprises determining the resolution in a peripheral location on the imaging plane.
17. The method of claim 16, wherein determining the resolution in a peripheral location on the imaging plane comprises determining the resolution in one of a corner location of the imaging plane, and an edge location of the imaging plane.
18. The method of claim 13, wherein improving the resolution in the second location comprises maximizing a value for a modulation transfer function (MTF) in the second location.
19. The method of claim 13, wherein fixing the position of the lens comprises applying an adhesive compound to retain the position of the lens.
20. A digital camera, comprising:
at least one lens element positioned in a lens body and configured to resolve an image on an imaging device; and
a lens alignment interface coupled to the at least one lens element and configured to permit the at least one lens element to be angularly deflected relative to an axis of symmetry of the lens body.
21. The digital camera of claim 20, wherein the lens alignment interface includes a rolling element extending between the at least one lens element and the lens body.
22. The digital camera of claim 21, wherein the lens alignment interface includes an elastic element configured to urge the rolling element against the lens body.
23. The digital camera of claim 21, wherein the lens alignment interface includes a lens mount that retains the at least one lens element, wherein the rolling element is urged against the lens mount by an elastic element.
24. The digital camera of claim 21, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens body and configured to engage an elongated slot in the lens mount.
25. The digital camera of claim 21, comprising a lens mount that retains the at least one lens element, further wherein the lens alignment interface includes a protuberance extending from the lens mount and configured to engage an elongated slot in the lens body.
26. The digital camera of claim 20, wherein the imaging device comprises one of a charge-coupled device (CCD) image sensing array, and a complementary metal oxide semiconductor (CMOS) image sensing array.
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 method for controlling an internal combustion engine, comprising:
performing a comparison of a reference value stored in a characteristics map with measured test value for a variable corresponding to an oxygen concentration in an exhaust gas of the internal combustion engine, wherein the measured test value for the variable corresponds to a selected operating state of the internal combustion engine;
determining a correction value for the variable corresponding to the oxygen concentration, on the basis of a deviation between the measured test value and the reference value; and
controlling an actuating element to influence at least one of a fuel quantity conducted to the internal combustion engine and an oxygen quantity supplied to the internal combustion engine, wherein the controlling is performed based on a measured actual value for the variable corresponding to the oxygen concentration and the correction value.
2. The method as recited in claim 1, wherein:
the selected operating state is defined by at least a rotational speed and an injection quantity.
3. The method as recited in claim 1, wherein:
no recirculation of an exhaust gas takes place in the selected operating state.
4. The method as recited in claim 1, wherein:
the measured actual value of the variable is determined via a sensor arranged in at least one of an exhaust line and a fresh-air line downstream from a mouth of an exhaust-return line.
5. The method as recited in claim 1, further comprising:
controlling at least one of the reference value and the measured actual value as a function of at least one of at least one temperature variable and a pressure variable.
6. A device for controlling an internal combustion engine, comprising:
an arrangement for performing a comparison of a reference value stored in a characteristics map with measured test value for a variable corresponding to an oxygen concentration in an exhaust gas of the internal combustion engine, wherein the measured test value for the variable corresponds to a selected operating state of the internal combustion engine;
an arrangement for determining a correction value for the variable corresponding to the oxygen concentration, on the basis of a deviation between the measured test value and the reference value; and
an arrangement for controlling an actuating element to influence at least one of a fuel quantity conducted to the internal combustion engine and an oxygen quantity supplied to the internal combustion engine, wherein the controlling is performed based on a measured actual value for the variable corresponding to the oxygen concentration and the correction value.
7. A memory storing a computer program that when executed results in a performance of the following:
performing a comparison of a reference value stored in a characteristics map with measured test value for a variable corresponding to an oxygen concentration in an exhaust gas of the internal combustion engine, wherein the measured test value for the variable corresponds to a selected operating state of the internal combustion engine;
determining a correction value for the variable corresponding to the oxygen concentration, on the basis of a deviation between the measured test value and the reference value; and
controlling an actuating element to influence at least one of a fuel quantity conducted to the internal combustion engine and an oxygen quantity supplied to the internal combustion engine, wherein the controlling is performed based on a measured actual value for the variable corresponding to the oxygen concentration and the correction value.
8. The memory as recited in claim 7, wherein:
the computer program is executed on a control unit for the internal combustion engine.