Distance measuring device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsHiroshi Kubota, Nobu Matsumoto
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Abstract
A distance measuring device according to one embodiment includes a light emitter, a first light receiver, and a second light receiver. The light emitter includes a light source. The light source emits an optical signal. The first light receiver includes a first sensor and a first optical system. The first sensor includes first pixels. The first optical system is configured to guide a reflected light of the optical signal emitted from the light emitter to the first sensor. The second light receiver includes a second sensor and a second optical system. The second sensor includes second pixels. The second optical system is configured to guide the reflected light to the second sensor.
Claims20
A distance measuring device comprising:
- a light emitter including a light source and a mirror, wherein when the light source emits an optical signal, and the mirror reflects the optical signal;
- a first light receiver including a first sensor and a first optical system, wherein the first sensor includes a plurality of first pixels arranged two-dimensionally on a first substrate, and the first optical system is configured to guide a reflected light of the optical signal emitted from the light emitter to the first sensor;
- a second light receiver including a second sensor and a second optical system, wherein the second sensor includes a plurality of second pixels arranged two-dimensionally on a second substrate different from the first substrate, and the second optical system is configured to guide the reflected light to the second sensor;
- a measurement section configured to calculate a first distance value and a second distance value, wherein the first distance value is calculated using a first time and a second time, and the second distance value is calculated using the first time and a third time, and wherein the first time is a time at which the light source emits the optical signal, the second time is a time at which the first sensor detects the reflected light, and the third time is a time at which the second sensor detects the reflected light;
- and
- a controller configured to cause the light source to emit the optical signal intermittently, wherein the controller is configured to control the mirror to perform scanning using the optical signal, set a first light-receiving area in which at least one first pixel among the first pixels is selectively turned on in the first sensor, set a second light-receiving area in which at least one second pixel among the second pixels is selectively turned on in the second sensor, and determine a position of the first light-receiving area and a position of the second light-receiving area according to a state of the mirror when the optical signal is emitted.
Dependencies are inferred from the claim text.