COUPLE OF OPTICAL LENS AND OPTICAL LENS FOR COUPLING LIGHT FROM ONE FIBER INTO ANOTHER FIBER IN TRANSMISSIVE AND REFLECTIVE OPTICAL SYSTEM

摘要

PURPOSE: A couple of optical lenses and an optical lens for coupling light from one fiber into another fiber in a transmissive and reflective optical system and an optical lens thereof are provided to obtain the high coupling efficiency by improving a structure of the optical lens even when a optical fiber deviates from a optical axis. CONSTITUTION: A pair of optical lenses includes a first biconvex optical lens and a second biconvex optical lens. The first biconvex optical lens(170) includes two equivalent aspheric optical surfaces. The second biconvex optical lens(172) includes two equivalent aspheric optical surfaces apart from the first biconvex optical lens. The first optical lens is used for forming the light emitted from a source optical fiber as one of a converging beam, a diverging beam, and a collimated beam. The second optical lens is used for focusing the beam into a receiving optical fiber in order to couple the light emitted from the source optical fiber to the receiving optical fiber.