Patent ID: 8873056
Filing Date: 2014-10-28
Classification: G01J

Abstract:
1. A spectroscopic sensor comprising: a plurality of interference filter units, 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 the light incident on the interference filter units; and a light detection substrate, arranged on the second mirror layer side, for detecting the light transmitted through the interference filter units; wherein the second mirror layers are separated for the respective interference filter units; and wherein the cavity layer is formed integrally over the interference filter units, while a part of the cavity layer enters a region between the second mirror layers adjacent to each other, the light-transmitting substrate is joined to the first mirror layer with an optical resin layer interposed therebetween and the cavity layer has outer edge parts reaching side faces of the light-transmitting substrate and the light detection substrate so that their side faces are flush with each other.