Distance measuring system
AssigneeSony Semiconductor Solutions Corporation
InventorMasashi Nakamura
Life of this patent
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Abstract
A distance measuring system according to an aspect of the present technology includes: two light sources outputting light having different wavelengths; a light source side optical member configured to change a direction of a part of light output from each of the two light sources; a reference time side light receiving unit on which light output by one of the two light sources, and changed in direction by the light source side optical member is incident; a distance calculation side light receiving unit on which light output by the other of the two light sources, transmitted through the light source side optical member, and reflected by an object (Obj) is incident; a reference time calculating unit; and a distance calculating unit.
Claims20
A distance measuring system comprising:
- a first light source and a second light source capable of outputting light having different wavelengths, wherein the first light source is disposed on a first surface of a first substrate;
- a light source side optical member configured to change a direction of a part of light output from each of the first light source and the second light source, wherein the second light source is disposed on the first surface of the first substrate;
- a reference time side light receiving unit on which light output by at least a first one of the first light source and the second light source, and changed in direction by the light source side optical member is incident;
- a distance calculation side light receiving unit on which light output by at least a second one of the first light source and the second light source, transmitted through the light source side optical member, and reflected by an object for measuring a distance is incident;
- a reference time calculating unit configured to calculate a reference time according to an elapsed time from a time point at which the at least a first one of the first light source and the second light source has output light to a time point at which the light is incident on the reference time side light receiving unit;
- and
- a distance calculating unit configured to calculate a distance to the object according to an elapsed time from the time point at which at least one of the first light source and the second light source has output light to a time point at which the light is incident on the distance calculation side light receiving unit and the reference time calculated by the reference time calculating unit, wherein the reference time side light receiving unit includes a first light receiving element disposed on a first surface of a second substrate, and wherein the distance calculation side light receiving unit includes a second light receiving element disposed on the surface of the second substrate;
- and
- a first filter unit disposed on a light incident side of the distance calculation side light receiving unit, wherein the first filter unit configured to shield one of the light output from the first light source and the light output from the second light source and to transmit another of the light output from the first light source and the light output from the second light source.
A distance measuring system, comprising:
- a light emitting unit, including:
- a light emitting side substrate;
- a first light source, wherein the first light source is operable to output light of a first wavelength, and wherein the first light source is disposed on a first side of the light emitting side substrate;
- a second light source, wherein the second light source is operable to output light of a second wavelength, and wherein the second light source is disposed on the first side of the light emitting side substrate;
- a light source side optical member configured to change a direction of a part of light output from each of the first light source and the second light source;
- a light receiving unit, including:
- a light receiving side substrate;
- a light receiving element unit, wherein the light receiving element unit is mounted on the light receiving side substrate, the light receiving element unit including:
- a first light receiving element;
- a second light receiving element;
- and
- a first filter unit disposed on a light incident side of the second light receiving element, wherein the first filter unit blocks light of the first wavelength and transmits light of the second wavelength.
Dependencies are inferred from the claim text.