Filter function-equipped optical sensor and flame sensor
2 Assignments
0 Petitions
Accused Products
Abstract
In order to provide a filter device capable of maintaining stable optical characteristics for an extended period of time and to provide also a photosensor using the filter device, a photosensor having a filter function includes a filter device having a colored glass filter and configured for permitting transmission of light of a predetermined wavelength range including a detection target wavelength range and a light receiving device for receiving the light transmitted through the filter device. The filter device includes a first interference filter structure comprised of a plurality of light transmitting layers stacked on each other, the first interference filter structure being deposited on a face of the colored glass filter. The light receiving device includes a semiconductor photodetector structure having one or more semiconductor layers, a light receiving area being formed in the one or more semiconductor layers within the semiconductor photodetector structure. The one or more semiconductor layers forming the semiconductor photodetector structure contain InxAlyGa1-x-yN (0≦x≦0.21, 0≦y≦1).
12 Citations
25 Claims
-
1-9. -9. (canceled)
-
10. A photosensor having a filter function, comprising:
-
a filter device having a colored glass filter and configured for permitting transmission of light of a predetermined wavelength range including a detection target wavelength range; and
a light receiving device for receiving the light transmitted through the filter device;
wherein said filter device includes a first interference filter structure comprised of a plurality of light transmitting layers stacked on each other, the first interference filter structure being deposited on a face of the colored glass filter;
said light receiving device includes a semiconductor photodetector structure having one or more semiconductor layers, a light receiving area being formed in the one or more semiconductor layers within the semiconductor photodetector structure; and
said one or more semiconductor layers forming the semiconductor photodetector structure contain InxAlyGa1-x-yN (0≦
x≦
0.21, 0≦
y≦
1) - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification