Optical module

Details Optical module Optical module

1998-12-01

2000-11-14

Epps, Georgia

Optical: systems and elements

Lens

With support

385 33, G02B 702

Patent

active

061478172

ABSTRACT:
An optical module has a housing of synthetic resin, a semiconductor device supported by the housing, and a spherical lens held in the housing. The housing has a plurality of teeth holding the spherical lens press-fitted between the teeth. Each of the teeth has a radially inner surface made up of at least three curved surfaces. The three curved surfaces include a first curved surface serving as a lens seat surface for positioning the spherical lens, the lens seat surface having a radius of curvature which is the same as the radius of the spherical lens, a second intermediate curved surface serving as a non-contact surface held out of contact with the spherical lens when the spherical lens is press-fitted between the teeth, the non-contact surface having a radius of curvature smaller than the radius of the spherical lens, and a third curved surface serving as a lens presser surface for smoothly introducing the spherical lens between the teeth. The third curved surface is curved in a direction opposite to the first and second curved surfaces. Each of the teeth has a radially outer surface inclined such that the proximal end thereof is spread radially outwardly from the distal end thereof. The housing has a portion which surrounds the teeth and is recessed to a large depth, and the radially outer surface of each of the teeth has a round surface at the proximal end thereof.

REFERENCES:
patent: 3904277 (1975-09-01), Phillips et al.
patent: 4707067 (1987-11-01), Haberland et al.
patent: 5333224 (1994-07-01), Kimihiro
patent: 5347604 (1994-09-01), Go et al.
patent: 5388171 (1995-02-01), Michikoshi et al.
patent: 5737465 (1998-04-01), Okochi
patent: 5757999 (1998-05-01), Tabuchi et al.
patent: 5973862 (1999-10-01), Hashizume

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