Optical module for transmitting optical signal

Abstract

An optical module comprises: a housing; a first incident surface mounted on the housing for receiving an optical signal converted from an electrical signal; a first output surface mounted on the housing for exporting the optical signal from the first incident surface; a second incident surface mounted on the housing for receiving another optical signal to be converted to another electrical signal; and a second output surface mounted on the housing for exporting the another optical signal from the second incident surface. An aperture of the first incident surface is smaller than an aperture of the second incident surface.

What is claimed is: 
     
         1 . An optical module comprising:
 a housing;   a first incident surface mounted on the housing for receiving an optical signal converted from an electrical signal;   a first output surface mounted on the housing for exporting the optical signal from the first incident surface;   a second incident surface mounted on the housing for receiving another optical signal to be converted to another electrical signal; and   a second output surface mounted on the housing for exporting the another optical signal from the second incident surface; wherein   an aperture of the first incident surface is smaller than an aperture of the second incident surface.   
     
     
         2 . The optical module as recited in  claim 1 , wherein an approximately 45 degrees angle is formed between the first incident surface and the first output surface, and an approximately 45 degrees angle is formed between the second incident surface and the second output surface. 
     
     
         3 . The optical module as recited in  claim 1 , wherein the first incident surface and the first output surface constitute a first lens, and the second incident surface and the second output surface constitute a second lens. 
     
     
         4 . The optical module as recited in  claim 3 , wherein a plurality of first lenses are provided to form a first lens array arranged in a row, and a plurality of second lenses are provided to form a second lens array arranged in a row. 
     
     
         5 . The optical module as recited in  claim 4 , wherein the first incident surface of the first lens and the second output surface of the second lens are located on a first surface of the housing. 
     
     
         6 . The optical module as recited in  claim 5 , wherein the first output surface of the first lens and the second incident surface of the second lens are located on an opposite second surface of the housing. 
     
     
         7 . The optical module as recited in  claim 1 , wherein the first incident surface of the first lens collimate the optical signals. 
     
     
         8 . The optical module as recited in  claim 1 , wherein the second incident surface of the second lens collimate the optical signals. 
     
     
         9 . The optical module as recited in  claim 8 , wherein the first and second lenses are staggered. 
     
     
         10 . The optical module as recited in  claim 1 , wherein an aperture of the first output surface is smaller than an aperture of the second output surface. 
     
     
         11 . An optical module comprising:
 a housing defining a lengthwise direction and a transverse direction perpendicular to each other and both perpendicular to a vertical direction along which opposite first and second faces are opposite to each other;   a first lens array including a plurality of first lenses thereof and a second lens array including a plurality of second lenses thereof, both of which are associated with the housing and space from each other in said lengthwise direction while each arranged in said transverse direction;   the first lens defining a first light transmission path with a first incident surface around the second face for receiving a first optical signal which is converted from an electrical signal, and with a first output surface around the first face for transmitting the first optical signal to a corresponding waveguide around the first face; and   the second lens defining a second light transmission path with a second incident surface around the first face for receiving a second optical signal from a corresponding waveguide around the first face, and with a second output surface around the second face for transmitting the second optical signal toward a photodiode for converting the second optical signal to an electrical signal; wherein   the first lens is configured to be different from the second lens.   
     
     
         12 . The optical module as claimed in  claim 11 , wherein the first lens defines a first reflection curved area around the first output surface and the second lens defines a second reflection curved area around the second incident surface under condition that the first reflection curved area and the second reflection curved area are sized different from each other. 
     
     
         13 . The optical module as claimed in  claim 12 , wherein said first reflection curved area is smaller than the second reflection curved area. 
     
     
         14 . The optical module as claimed in  claim 11 , wherein the first lens is smaller than the second lens. 
     
     
         15 . The optical module as claimed in  claim 14 , wherein the first lens is configured to be a converging type while the second lens is configured to be a parallel type. 
     
     
         16 . The optical module as claimed in  claim 11 , wherein the first lens defines a first curved area around the first incident surface and the second lens defines a second curved area around the second incident surface under condition that the first reflection curved area and the second reflection curved area are sized different from each other. 
     
     
         17 . The optical module as claimed in  claim 16 , wherein the first curved area is smaller than the second curved area.