Optical scanning device and method of detecting angle of reflection unit in optical scanning device
AssigneeFunai Electric Co., Ltd.
InventorsYuichiro Masuda, Takeshi Inoda, Mika Hamaoka
Life of this patent
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Abstract
Provided is an optical scanning device. The optical scanning device includes a swingable reflection unit; a blocking unit that is provided in the reflection unit to move in linkage with the reflection unit; and a sensor unit that includes an output unit configured to output a detection target and a detection unit configured to detect the detection target, wherein, when the reflection unit is in a predetermined swing angle range, the blocking unit blocks a path of the detection target between the output unit and the detection unit.
Claims20
An optical scanning device comprising:
- a reflector, which is swingable;
- a blocking plate that is provided in the reflector to move in linkage with the reflector, wherein the blocking plate includes at least a first blocking plate disposed on a lower side of the reflector and a second blocking plate disposed on an upper side of the reflector;
- and
- a sensor unit that includes an output unit, which is a light generator or an electromagnetic wave generator configured to output a detection target and a detection unit, which is a light receiver or an electromagnetic wave receiver configured to detect the detection target,
- wherein the output unit is at a position that faces the detection unit, and
- wherein, when the reflector is in a predetermined swing angle range, the blocking plate blocks a path of the detection target between the output unit and the detection unit.
A method of detecting an angle comprising:
- swinging a blocking plate, which moves in linkage with a reflector that swings, wherein the blocking plate includes at least a first blocking plate disposed on a lower side of the reflector and a second blocking plate disposed on an upper side of the reflector;
- and
- detecting that the blocking plate has reached a predetermined swing angle using a sensor unit and detecting a swing angle of the reflector,
- wherein the sensor unit detects the swing angle by detecting whether a path of a detection target between an output unit, which is a light generator or an electromagnetic wave generator configured to output the detection target and a detection unit, which is a light receiver or an electromagnetic wave receiver configured to detect the detection target is blocked by the blocking plate,
- wherein the output unit is at a position that faces the detection unit.
Dependencies are inferred from the claim text.