Patent ID: 7978320
Filing Date: 2011-07-12
Classification: G01S

Abstract:
1. A light angle detection device, comprising: a first light receiving unit that has a first light receiving lens collecting incident light and a first light sensing element receiving the incident light collected by the first light receiving lens; and a second light receiving unit that has a second light receiving lens collecting incident light and a second light sensing element receiving the incident light collected by the second light receiving lens, the second light receiving unit being arranged side-by-side with the first light receiving unit, wherein, the first and second light sensing elements are encapsulated in a single body of light transmitting resin, the first and second light receiving lenses are molded from a portion of the light transmitting resin, the first light receiving lens, the first light sensing element, the second light receiving lens, and the second light sensing element are disposed such that a first straight line passing through a center of a light receiving surface of the first light sensing element and a vertex of the first light receiving lens, a second straight line passing through a center of a light receiving surface of the second light sensing element and a vertex of the second light receiving lens, and a third straight line passing through the center of the light receiving surface of the first light sensing element and the center of the light receiving surface of the second light sensing element form an isosceles triangle, in which the third straight line serves as a base, and the light sensing outputs of the first and second light sensing elements change depending on the incidence angle of the incident light relative to the third straight line.