Radar apparatus and optical receiver thereof
First Claim
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1. A light receiver comprising:
- a refractive body that receives an incident light coming in at an incident angle and refracts the incident light with a refractile angle, wherein the refractile angle is smaller than the incident angle;
a first light receiving element that is disposed in a position on an incidence surface of the refractive body, wherein a light receiving face of the first light receiving element faces on the incidence surface of the refractive body; and
a mirror that is disposed on an opposite plane being on an opposite side of the refractive body relative to the incidence surface, wherein the mirror reflects at least a portion of the incident light coming into the refractive body through the incidence surface toward the first light receiving element, whereinthe opposite plane of the refractive body is a curved surface that protrudes toward an opposite direction relative to the incidence surface, andthe mirror is formed in a concave shape that extends along the curved surface.
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Abstract
A radar apparatus has a light receiver that includes a refractive body and a mirror on an opposite surface of the refractive body relative to an incidence surface of the refractive body for receiving an incident light from an outside of the radar apparatus. The refractive angle of the refractive body is configured to be smaller than an incident angle of the incident light, and the mirror is configured to reflect at least a portion of the incident light toward a first light receiving element that is disposed on the incidence surface with its light receiving face facing the incidence surface of the refractive body.
13 Citations
22 Claims
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1. A light receiver comprising:
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a refractive body that receives an incident light coming in at an incident angle and refracts the incident light with a refractile angle, wherein the refractile angle is smaller than the incident angle; a first light receiving element that is disposed in a position on an incidence surface of the refractive body, wherein a light receiving face of the first light receiving element faces on the incidence surface of the refractive body; and a mirror that is disposed on an opposite plane being on an opposite side of the refractive body relative to the incidence surface, wherein the mirror reflects at least a portion of the incident light coming into the refractive body through the incidence surface toward the first light receiving element, wherein the opposite plane of the refractive body is a curved surface that protrudes toward an opposite direction relative to the incidence surface, and the mirror is formed in a concave shape that extends along the curved surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. A light receiver comprising:
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a refractive body that receives an incident light coming in at an incident angle and refracts the incident light with a refractile angle, wherein the refractile angle is smaller than the incident angle; a first light receiving element that is disposed in a position on an incidence surface of the refractive body, wherein a light receiving face of the first light receiving element faces on the incidence surface of the refractive body; and a mirror that is disposed on an opposite plane being on an opposite side of the refractive body relative to the incidence surface, wherein the mirror reflects at least a portion of the incident light coming into the refractive body through the incidence surface toward the first light receiving element, wherein the opposite plane of the refractive body is a Fresnel surface that is an equivalent of a convex surface protruding toward an opposite direction relative to the incidence surface, and the mirror is a Fresnel reflector that extends along the Fresnel surface.
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20. A light receiver comprising:
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a refractive body that receives an incident light coming in at an incident angle and refracts the incident light with a refractile angle, wherein the refractile angle is smaller than the incident angle; a first light receiving element that is disposed in a position on an incidence surface of the refractive body, wherein a light receiving face of the first light receiving element faces on the incidence surface of the refractive body; and a mirror that is disposed on an opposite plane being on an opposite side of the refractive body relative to the incidence surface, wherein the mirror reflects at least a portion of the incident light coming into the refractive body through the incidence surface toward the first light receiving element, wherein the incidence surface is in a shape of the Fresnel surface.
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21. A light receiver comprising:
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a refractive body that receives an incident light coming in at an incident angle and refracts the incident light with a refractile angle, wherein the refractile angle is smaller than the incident angle; a first light receiving element that is disposed in a position on an incidence surface of the refractive body, wherein a light receiving face of the first light receiving element faces on the incidence surface of the refractive body; a mirror that is disposed on an opposite plane being on an opposite side of the refractive body relative to the incidence surface, wherein the mirror reflects at least a portion of the incident light coming into the refractive body through the incidence surface toward the first light receiving element, and a second light receiving element that is apart from the first light receiving element, wherein the second light receiving element is disposed in contact with the first light receiving element with its reverse face of the light receiving face facing to a reverse face of the light receiving face of the first light receiving element. - View Dependent Claims (22)
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Specification