JP2021139883A5

JP2021139883A5 -

Info

Publication number: JP2021139883A5
Application number: JP2020199812A
Authority: JP
Filing date: 2020-12-01
Publication date: 2023-12-04

Description

本発明の一側面としての光学装置は、光源からの照明光を偏向して物体を走査すると共に、物体からの反射光を偏向する偏向部と、照明光を偏向部に導光すると共に、偏向部からの反射光を受光部に導光する導光部とを有し、導光部は、照明光が通過する第一および第二の通過領域と、反射光を反射する反射領域とを備え、照明光は、導光部により第一の照明光、および第二の照明光に分岐され、第一および第二の照明光はそれぞれ、互いの射出方向が非平行となるように第一および第二の通過領域から射出された後、偏向部に入射することを特徴とする。
An optical device according to one aspect of the present invention includes a deflection unit that deflects illumination light from a light source to scan an object and deflects reflected light from the object, and a deflection unit that guides the illumination light to the deflection unit and deflects the illumination light from the object. and a light guide section that guides reflected light from the section to the light receiving section, and the light guide section includes first and second passage areas through which the illumination light passes and a reflection area that reflects the reflected light. , the illumination light is branched into a first illumination light and a second illumination light by the light guide, and the first and second illumination lights are separated from each other so that their emission directions are non-parallel to each other. It is characterized in that it enters the deflection section after being emitted from the second passage area.

Claims

a deflection unit that deflects illumination light from a light source to scan an object and deflects reflected light from the object;
a light guide section that guides the illumination light to the deflection section and guides the reflected light from the deflection section to a light receiving section;
The light guide section includes first and second passage areas through which the illumination light passes, and a reflection area that reflects the reflected light,
The illumination light is branched into first illumination light and second illumination light by the light guide,
The first and second illumination lights are respectively emitted from the first and second passage areas such that their emission directions are non-parallel to each other, and then enter the deflection section. Device.

2. The optical device according to claim 1, wherein the illumination light is branched by spatially dividing a part of the luminous flux by the light guide.

The optical device according to claim 1, wherein the illumination light is branched by dividing the intensity of the light by the light guiding section.

The optical device according to claim 1, wherein the illumination light is split by being split into a first polarized light component and a second polarized light component orthogonal to the first polarized light component by the light guiding section. .

5. The optical device according to claim 1, wherein the first and second illumination lights have the same amount of light.

The optical device according to any one of claims 1 to 4, wherein the amounts of the first and second illumination lights are different from each other.

The light guide includes a first surface onto which the illumination light is incident, and a reflective surface that reflects the illumination light,
2. The second illumination light incident from the first surface is branched within the light guide, reflected by the reflective surface, and emitted from the second passage area. 7. The optical device according to any one of items 6 to 6.

The light guide section has an angle α ₁ between the first surface and the second passage area or the reflection area, and an angle α ₂ between the second passage area or the reflection area and the reflection surface. and when,
α ₁ + α ₂ = 90
The optical device according to claim 7, wherein the optical device satisfies the following formula.

The optical device according to any one of claims 1 to 8, wherein the light guide section expands the diameter of the luminous flux of the illumination light.

10. The optical device according to claim 1, wherein the first and second passage areas are common.

2. The light guiding section includes a second surface having the first passage area and the reflection area, and a third surface having the second passage area and the reflection area. 1. The optical device according to 1.

The optical device according to claim 11, wherein the first and second illumination lights intersect before entering the deflection section.

13. The reflected light of the first and second illumination lights passes through a common optical system after passing through the light guiding section and before entering the light receiving section. The optical device according to item 1.

14. The optical device according to claim 13, wherein the entrance pupil of the common optical system is located on the deflection section.

The optical device according to claim 13 or 14, wherein the common optical system is a condensing mirror.

Any one of claims 1 to 15, further comprising a telescope that expands the beam diameter of the illumination light deflected by the deflection unit and reduces the beam diameter of the reflected light from the object. Optical device as described in section.

The optical device according to claim 16, wherein the deflection unit is arranged at an entrance pupil position of the telescope.

18. The optical device according to claim 1, wherein illumination ranges of the first and second illumination lights partially overlap.

The optical device according to any one of claims 1 to 18, further comprising a control unit that acquires distance information of the object based on an output of the light receiving unit.

The vehicle is characterized by comprising an optical device according to any one of claims 1 to 19, and determining the possibility of a collision between a vehicle and the object based on distance information about the object obtained by the optical device. In-vehicle system.

The in-vehicle system according to claim 20, further comprising a control device that outputs a control signal that causes the vehicle to generate a braking force when it is determined that there is a possibility of a collision between the vehicle and the object.

The in-vehicle system according to claim 20 or 21, further comprising a warning device that issues a warning to a user of the vehicle when it is determined that there is a possibility of a collision between the vehicle and the object.

The in-vehicle system according to any one of claims 20 to 22, further comprising a notification device that notifies the outside of information regarding a collision between the vehicle and the object.

A moving device comprising the optical device according to any one of claims 1 to 19, and capable of holding and moving the optical device.

25. The mobile device according to claim 24, further comprising a determination unit that determines the possibility of collision with the object based on distance information about the object obtained by the optical device.

The moving device according to claim 25, further comprising a control unit that outputs a control signal for controlling movement when it is determined that there is a possibility of collision with the object.

The mobile device according to claim 25 or 26, further comprising a warning unit that issues a warning to a user of the mobile device when it is determined that there is a possibility of collision with the object.

The mobile device according to any one of claims 24 to 27, further comprising a notification unit that notifies the outside of information regarding the collision with the object.