Optical module, method of manufacturing the same, and sleeve
AssigneeSumitomo Electric Industries, Ltd.
InventorHiromi Kurashima
Life of this patent
Estimating the term…
Abstract
An optical module comprises a plastic package constituted by a package main body and a cover, sleeves formed integrally with the package main body, a circuit board held in the package main body, light-activated elements fixed at predetermined positions of the circuit board, three projections formed integrally with an inner surface of the package main body and brought into contact with a periphery of the circuit board to position the circuit board, springs formed integrally with an inner surface of the package to press the periphery of the circuit board against the projections. Since the sleeve and the package main body are integrally formed by plastic molding, the number of components is reduced, thereby simplifying the assembling steps.
Claims17
An optical module comprising:
- a plastic package for receiving and holding a connector plug connected to an optical fiber, said package including a package main body and a cover for closing an open portion of said package main body;
- a sleeve formed integrally with said package main body by plastic molding to receive an end portion of said optical fiber when said connector plug is held in said package main body;
- a circuit board held in said open portion of said package main body;
- a light-activated element fixed at a predetermined position of said circuit board;
- three projections formed integrally with an inner surface of said package main body and brought into contact with a periphery of said circuit board to position said circuit board;
- spring means formed integrally with an inner surface of said package to press said periphery of said circuit board against said projections;
- and
- a condenser lens coaxially arranged in said sleeve.
A method of manufacturing an optical module comprising a plastic package for receiving and holding a connector plug connected to an optical fiber, said package including a package main body and a cover for closing an open portion of said package main body, a sleeve formed integrally with said package main body to receive an end portion of said optical fiber when said connector plug is held in said package main body, a circuit board held in said open portion of said package main body, a light-activated element fixed at a predetermined position of said circuit board, three projections formed integrally with an inner surface of said package main body and brought into contact with a periphery of said circuit board to position said circuit board, and spring means formed integrally with an inner surface of said package to press said periphery of said circuit board against said projections, comprising the steps of:
- providing a board supporting table having three positioning pins mounted on a surface in substantially the same arrangement as that of said three projections;
- resting said circuit board on said surface of said board supporting table;
- pressing said circuit board such that said periphery of said circuit board is brought into contact with all said pins;
- defining contact points of said pins as reference points;
- and
- fixing said light-activated element at position predetermined with respect to said reference points.
Dependencies are inferred from the claim text.