Patent ID: 7139139
Filing Date: 2006-11-21
Classification: G02B,H04J

Abstract:
1. An optical module, wherein the optical module includes a package that accommodates an optical system having a light path, the optical module comprising; a main body, which is part of the package, wherein the main body has an opening; a lid, which is attached to the main body to close the opening of the main body, wherein the lid seals the package; and an anti-deterioration agent located inside the package at a position out of said light path of the optical system, wherein said anti-deterioration agent is for preventing deterioration of the optical system, wherein the anti-deterioration agent includes at least one of desiccant and deoxidant, wherein the optical system includes a demultiplexing unit for separating incident light that includes optical signals having different wavelengths into each wavelength; wherein the optical system includes a collimator lens for converting incident light that includes optical signals into parallel light, wherein the demultiplexing unit includes a diffraction grating for separating the parallel light into optical signals having different wavelengths, and wherein the separated optical signals are each converged by the collimator lens; wherein the diffraction grating is inclined with respect to an optical axis of the collimator lens; wherein the anti-deterioration agent is a molded piece formed into a predetermined shape, and wherein the anti-deterioration agent is located at a space formed between the diffraction grating and the package at the rear of the diffraction grating.