The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1987
Filed:
Nov. 16, 1984
Hideo Ando, Tokyo, JP;
Akihiko Doi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Toshiba Automation Equipment Engineering, Ltd., Kawasaki, JP;
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.