Patent ID: 9587980
Date: 2017-03-07
CPC Classifications: G01J

Claim:
1. A spectroscopic sensor comprising: an interference filter unit, having a cavity layer and first and second mirror layers opposing each other through the cavity layer, for selectively transmitting therethrough light in a predetermined wavelength range according to an incident position thereof; a light-transmitting substrate, arranged on the first mirror layer side, for transmitting therethrough light incident on the interference filter unit; and a light-detecting substrate, arranged on the second mirror layer side, for detecting the light transmitted through the interference filter unit; wherein the cavity layer has: a filter region held between the first and second mirror layers; a surrounding region surrounding the filter region with a predetermined distance therefrom when seen in an opposing direction of the light-transmitting and light-detecting substrates; and a connecting region connecting an end part on the light-detecting substrate side of the filter region and an end part on the light-detecting substrate side of the surrounding region to each other, wherein the filter region, the surrounding region, and the connecting region are formed integrally.