Patent ID: 9075193
Filing Date: 2015-07-07
Classification: G01J,G02B

Abstract:
1. A spectroscopic module comprising: a main unit for transmitting therethrough light incident thereon from one side; a spectroscopic unit, disposed on a convex curved surface formed on the other side of the main unit, for dispersing the light incident on the main unit and reflecting the light to the one side of the main unit; and a photodetector, disposed on the one side of the main unit, for detecting the light dispersed by the spectroscopic unit; wherein the spectroscopic unit has a diffraction layer formed along the curved surface, a flange integrally formed with the diffraction layer along a periphery thereof so as to become thicker than the diffraction layer, and a reflection layer formed on the other side of the diffraction layer; and wherein the diffraction layer is formed with a diffraction grating pattern arranged eccentric with respect to a center of the diffraction layer toward a predetermined side.