| CPC G01S 7/4816 (2013.01) [G01S 7/4813 (2013.01); G01S 7/4817 (2013.01); G01S 17/931 (2020.01); G02B 26/105 (2013.01)] | 7 Claims |
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1. A lidar apparatus comprising:
a light projector configured to emit light in a predetermined direction;
a light receiver configured to receive light arriving from a predetermined direction;
a scanner including a deflecting mirror configured to reflect light entering from the light projector, the scanner configured to rotate the deflecting mirror with respect to a predetermined rotation axis, thereby changing an output direction, which is a direction for the light entering from the light projector to be reflected by the deflecting mirror and outputted, along a main scanning direction orthogonal to an axial direction of the rotation axis, the scanner configured to cause reflected light from a target present within a scanning range to be reflected by the deflecting mirror and led to the light receiver;
an enclosure that houses all of the light projector, the light receiver, and the scanner;
a partition plate made of a material that blocks transmission of light, the partition plate configured to partition an internal space of the enclosure into a light-projecting space where the light projector is disposed and a light-receiving space where the light receiver is disposed; and
a light shielding plate made of a material that blocks transmission of light, the light shielding plate provided between a light-projecting deflector, which is a portion of the deflecting mirror used for light projection, and a light-receiving deflector, which is a portion of the deflecting mirror used for light reception, the light shielding plate configured to integrally rotate with the deflecting mirror, wherein:
the light-projecting deflector of the deflecting mirror and the light-receiving deflector of the deflecting mirror form the same plane,
the light-projecting deflector and the light-receiving deflector are composed of one flat plate-shaped mirror,
a width of the light-receiving deflector along a direction orthogonal to the rotation axis is equal to or less than a diameter of the light shielding plate,
a width of the light-projecting deflector is less than the width of the light-receiving deflector,
the partition plate is located closer to the light-projecting space than the light shielding plate is, and
the partition plate has, with respect to at least a part of a peripheral portion of the light shielding plate, an overlap portion where a plate surface of the partition plate and a plate surface of the light shielding plate overlap portion without being in contact with each other,
wherein
a portion of the light-projecting deflector is positioned in the light-receiving space.
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