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:
Dec. 11, 1990
Filed:
Jan. 10, 1989
Yoshinari Kozuka, Nagoya, JP;
Shogo Kawaguchi, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
An optical unit including a first electrooptical crystal element having a pyroelectric effect and first polarized faces, and a second electrooptical crystal element having a pyroelectric effect and having second polarized faces corresponding to the first polarized faces. The first and second polarized faces are electrically connected to each other such that a polarity of an electrical charge on each of the first polarized faces is opposite to that of an electrical charge on a corresponding one of the second polarized faces. The first electrooptical crystal element is positioned such that a light beam is propagated through the first electrooptical crystal element.