| 摘要 |
PROBLEM TO BE SOLVED: To configure an optical device 1 having spectral characteristics close to the standard visibility characteristics of human being at a low cost.SOLUTION: The optical device 1 includes an optical chip 4 having a light-receiving region R for light detection formed on the light-receiving surface 5 on the light incidence side, and an optical filter 7 containing phosphate glass and installed on the light-receiving surface 5 so as to cover the light-receiving region R. Consequently, a high accuracy photodetection device can be configured at a low cost without using a plurality of light detection elements, an arithmetic circuit for matching to the standard visibility characteristics, or an expensive light interference filter. |
