Optical branching and coupling device using an aspherical lens
AssigneeRohm Co., Ltd.
InventorsHaruo Tanaka, Naotaro Nakata
Life of this patent
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Abstract
Disclosed is an optical branching and coupling device of high quality which is prevented from malfunction, corrosion and deterioration due to condensation on optical components incorporated therein by virtue of perfect sealing. The optical branching and coupling device including a housing provided with an aperture, optical instruments, associated with the housing, for branching, coupling, transmitting and receiving optical information input to the device, and an aspherical lens inserted into the aperture and fixed thereto by hermetic sealing with a glass material, the aspherical lens being adapted to connect at an end face thereof with at least one optical fiber.
Claims9
An optical branching and coupling device comprising:
- a housing provided with an aperture;
- optical instruments, associated with the housing, for branching, coupling, transmitting and receiving optical information input to the device;
- an aspherical lens having a rear end formed with a collar portion which is formed continuously and integrally with a remaining portion of said aspherical lens, said collar portion being wider in width than said remaining portion of said aspherical lens, said aspherical lens is inserted into the aperture and said collar portion being fixed to a portion of said aperture by hermetic sealing with a glass material;
- at least one optical fiber placed on an end face of the collar portion;
- and
- a mirror block, provided within said housing, for switching a course of an optical signal input from said at least one optical fiber or for separating input light of different wavelengths into light having an individual wavelength.
Dependencies are inferred from the claim text.