Patent ID: 8545112
Filing Date: 2013-10-01
Classification: G02B

Abstract:
1. A main housing for optical sub-assembly for transceivers for connecting with an optical fiber connector, an optical transmission unit, an optical receiving unit and a filter, the light emitted from the optical transmission unit being refracted and focused by the filter and coupled to optical fiber in the optical fiber connector, the light received by the optical fiber being totally reflected and focused by the filter and coupled to the optical receiving unit, the main housing comprising: a cylindrical member made of metal material, the cylindrical member having a first end for accommodating the optical transmission unit and a second end for accommodating the optical fiber connector, the cylindrical member having a central passage extending from the first end to the second end, a tubular member forming groove being formed on an outer circumference of the cylindrical member, a sleeve forming reference hole being formed on a tubular wall of the cylindrical member in communication with the central passage, the sleeve forming reference hole communicating with the tubular member forming groove to form a flow way; and a bypass member made of plastic material by means of insert injection to connect with the cylindrical member, the cylindrical member and the bypass member together forming a T-shaped structure, the bypass member having a connection tube positioned in the tubular member forming groove, a filter holder positioned in the central passage of the cylindrical member and connected with the connection tube for precisely connecting the filter with the filter holder, and a sleeve for accommodating the optical receiving unit, the sleeve outward extending along the sleeve forming reference hole and being connected with the filter holder.