Optical head

Details Optical head Optical head

1984-11-16

1987-02-03

Wan, Gene

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350255, H01J 314, G02B 702

Patent

active

046410236

ABSTRACT:
In an optical head, a semiconductor laser is supported on a base and the base is secured to a hollow frame. A lens-barrel for supporting collimator lens system is disposed in the hollow frame so that the collimator lens system is faced to the semiconductor laser. The frame and lens-barrel are secured in point contact securement to each other by studs screwed in dies provided on the frame. The base, lens-barrel and frame are made of materials having linear expansion coefficients satisfying either one of inequalities .alpha..gtoreq..gamma..gtoreq..beta. and .beta.>.gamma.>.alpha., where .alpha., .beta. and .gamma. are linear expansion coefficients of the base, frame and lens-barrel respectively.

REFERENCES:
patent: 2533478 (1950-12-01), Lee et al.
patent: 4236790 (1980-12-01), Smith
patent: 4431267 (1984-02-01), Finck et al.

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