Detection device and manufacturing method of detection device
A detection device for detecting a power of an input light is provided with a light-receiving module that outputs an electrical signal according to a power of an input light received at a light-receiving surface and an optical system that collimates and guides to the light-receiving surface the input light from the outside. Moreover, this detection device is provided with a structure that decreases an incidence angle of the input light at an interface between the optical system and the light-receiving surface.
1. A detection device that detects a power of an input light, comprising:
a light-receiving module comprising a light-receiving surface and that outputs an electrical signal according to the power of the input light received at the light-receiving surface; and
an optical system that collimates and guides to the light-receiving surface the input light from an outside; wherein
the detection device decreases an incidence angle of the input light at an interface between the optical system and the light-receiving surface to be no more than 30 degrees.
2. A detection device that detects a power of an input light, comprising:
a light-receiving module that has a light-receiving surface and outputs an electrical signal according to the power of the input light received at the light-receiving surface;
an optical lens that collimates and guides to the light-receiving surface the input light from an outside; and
an optical component that decreases an incidence angle of the input light at an interface between the optical lens and the light-receiving module.
3. The detection device according to claim 2 , wherein
the light-receiving module comprises a transparent covering body covering the light-receiving surface and receives the input light that arrives via the transparent covering body at the light-receiving surface and,
the optical component decreases an incidence angle of the input light at a surface of the transparent covering body.
4. The detection device according to claim 3 , wherein
the optical component decreases the incidence angle to be no more than 30 degrees.
5. The detection device according to claim 3 , wherein
the optical component is a prism disposed in a path of the input light between the optical lens and the covering body.
6. A detection device that detects a power of an input light, comprising:
a light-receiving module that has a light-receiving surface and outputs an electrical signal according to the power of the input light received at the light-receiving surface;
an optical lens that collimates and guides to the light-receiving surface the input light from an outside; and
an optical component that decreases an incidence angle of the input light at an interface between the optical lens and the light-receiving module,
wherein the light-receiving module comprises a transparent covering body covering the light-receiving surface and receives the input light that arrives via the transparent covering body at the light-receiving surface and,
wherein the optical component decreases an incidence angle of the input light at a surface of the transparent covering body.
7. The detection device according to claim 6 , wherein
the optical component decreases the incidence angle to be no more than 30 degrees.
8. The detection device according to claim 6 , wherein
the optical component is a prism disposed in a path of the input light between the optical lens and the covering body.