Patent ID: 7215853

Claim:
An optical module comprising: a common substrate, a collimator for an input light on said substrate, which collimates a light input from an outside location, a collimator for an output light on said substrate, which collects an incident light to be output to the outside location and transmits the light to the outside location, an interference filter provided on an optical path from the collimator for an input light to the collimator for an output light, and a mirror or prism on said substrate for correcting an optical path which is provided between the interference filter and each of the collimators, wherein each of the collimators is provided on a V groove formed on the common substrate in parallel, wherein each of the V grooves is in parallel and orthogonal to a linear side edge of said substrate, and wherein each of the collimators is constituted by an optical fiber and a collimate lens provided on an emitting or incident end of the optical fiber, and for at least one collimator, both the optical fiber and the collimate lens are provided on the same V groove.