Patent ID: 6973235
Filing Date: 2005-12-06
Classification: G02B

Abstract:
1. An optical filter device adapted to collimate optical signals coming from at least one optical fiber, and to select signals in a predetermined wavelength band from said optical signals to output, comprising: at least one fiber pigtail for receiving and fixing the at least one optical fiber; a molded lens fixed in series with the fiber pigtail for collimating the optical signals coming from the at least one optical fiber; and a filter opposed to the molded lens and adapted to select signals of a predetermined wavelength; wherein the molded lens is located between the fiber pigtail and the filter and has a single index, and collimates dispersed-light beams coming from the at least one optical fiber to parallel-light beams, and converges parallel-light beams of the predetermined wavelength which are reflected by the filter to pass into the at least one optical fiber.