Patent ID: 6483982
Filing Date: 2002-11-19
Classification: G02B

Abstract:
A reflecting-mirror-type variable optical attenuator comprising:a mount being a housing member having a stepped cylindrical hole having a smaller cylindrical hole section and a larger cylindrical hole section, the larger cylindrical hole section having an end face; a rod lens being supported by the smaller cylindrical hole section and having an optical axis; a pair of optical fibers, each having at least one end face and an optical axis; connecting means for the optical fiber pair connecting the end faces of said pair of optical fibers to one end face of said rod lens so that the optical axis of each optical fiber is arranged symmetrically about the optical axis of said rod lens and parallel to each other; a reflecting mirror; supporting and guiding means for supporting said reflecting mirror in the larger cylindrical hole section to be linearly movable with a pin-grove connection; and driving means for driving said supporting and guiding means so as to adjust the quantity of light from one of said pair of optical fibers, which is reflected by said reflecting mirror via said rod lens to impinge on the other of said pair of optical fibers via said rod lens, said driving means including a motor being fixed to the end face of the larger cylindrical hole section.