Lamp unit
AssigneeKoito Manufacturing Co., Ltd.
InventorTakayuki Yagi
Life of this patent
Estimating the term…
Abstract
The light deflection device is configured to switch a first reflection position and a second reflection position in at least some region of the reflection part. The first reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected toward the projection optical system so as to be effectively used as a part of a desired light distribution pattern. The second reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected so as not to be effectively used. The detection unit is arranged at a position at which the light reflected at the second reflection position by the light deflection device can be detected.
Claims5
A lamp unit comprising:
- a projection optical system;
- a light deflection device which is arranged at a rear of the projection optical system and which is configured to selectively reflect incident light toward the projection optical system;
- an irradiation optical system configured to irradiate light to a reflection part of the light deflection device;
- and
- a detection unit configured to detect light reflected by the light deflection device,
- wherein the light deflection device is configured to switch a first reflection position and a second reflection position in at least some region of the reflection part, the first reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected toward the projection optical system so as to be effectively used as a part of a desired light distribution pattern, and the second reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected so as not to be effectively used, and
- wherein the detection unit is arranged at a position at which the light reflected at the second reflection position by the light deflection device can be detected.
A lamp unit comprising:
- a projection optical system;
- a light deflection device which is arranged at a rear of the projection optical system and which is configured to selectively reflect incident light toward the projection optical system;
- an irradiation optical system configured to irradiate light to a reflection part of the light deflection device;
- an inspection light irradiation unit configured to irradiate non-visible light, and
- a detection unit configured to detect non-visible light reflected by the light deflection device,
- wherein the light deflection device is configured to switch a first reflection position and a second reflection position in at least some region of the reflection part, the first reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected toward the projection optical system so as to be effectively used as a part of a desired light distribution pattern, and the second reflection position is a position at which the light irradiated by the irradiation optical system is to be reflected so as not to be effectively used, and
- wherein the detection unit is arranged at a position at which the non-visible light reflected at the first reflection position by the light deflection device can be detected.
Dependencies are inferred from the claim text.