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:
Jul. 06, 1993
Filed:
Jul. 17, 1991
Applicant:
Inventors:
Kayoko Taniguchi, Kanagawa, JP;
Hideki Tsuchiya, Kanagawa, JP;
Assignee:
Sony Magnescale, Inc., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G03H / ;
U.S. Cl.
CPC ...
359 12 ; 359 26 ; 359 30 ;
Abstract
An apparatus for making a hologram scale is comprised of a reference diffraction grating on which a light becomes incident and from or by which the incident light is emitted or reflected as a diffracted light, and a recording material, wherein at least two diffracted lights of the diffracted light are caused to interfere with each other as an object wave and a reference wave so as to form a hologram scale on the recording material. Further, an apparatus for making an assembled hologram scale, a hologram scale, an assembled hologram scale and a moving member having a hologram scale are also provided.