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:
Jun. 19, 1990
Filed:
Apr. 24, 1989
Yukihiro Ageishi, Kawasaki, JP;
Kaihei Isshiki, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method and an apparatus by use of three-dimensional photo-lithographic exposure employed for transferring an image to a recording medium among a series of processing works of practicing groove-processing, etc., corresponding to the image by utilization of photo-etching technology or the like, the apparatus for performing three-dimensional exposure comprising an optical unit, a work gripping assembly, a work moving mechanism, a control unit, and a main body frame, and the optical unit comprising a light source portion, a lens portion, and a reflection mirror, wherein the ultraviolet rays focused by the reflection mirror through a slit of a photo-mask onto a photo-sensitive coating film formed on an outer surface of a work loosely inserted into the through-hole of the reflection mirror together with a photo-mask surrounding an outer circumference of the work.