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.:

US 7440191 B1

PDF
Full Text
Expired
Date of Patent:
Oct. 21, 2008

Filed:

Apr. 15, 2005
Applicants:

Takashi Sekiguchi, Tochigi, JP;

Kazuo Endo, Tochigi, JP;

Katsumi Endo, Tochigi, JP;

Shigeru Kato, Tochigi, JP;

Inventors:

Takashi Sekiguchi, Tochigi, JP;

Kazuo Endo, Tochigi, JP;

Katsumi Endo, Tochigi, JP;

Shigeru Kato, Tochigi, JP;

Assignee:

Fujinon Sano Corporation, Sano-shi, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/12 (2006.01); G02B 27/14 (2006.01);
U.S. Cl.
CPC ...
Abstract

For the purpose of depositing deviation-free dichroic coatings of high plane rectitude, there is disclosed a method starting with preparation of glass assembly units each composed of first and second glass members of different lengths. A first dichroic coatingA is deposited on a lateral side of one glass member, and the other glass member is joined on the first dichroic coatingA on the one glass member to obtain a glass assembly unitA lateral side of the glass assembly unitis ground to one and same plane at an angle of 90 degrees, and then two edge lines on the opposite side are ground at an angle of 45 degrees to obtain a prism member. A second dichroic coating is deposited on the prism member, and joined with another prism member without a second dichroic coating to obtain a parental cross prism material to be cut into cubes for use as cross prisms.


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Sekiguchi, Takashi. (2008). Method for manufacturing cross prism (U.S. Patent No. 7440191). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7440191

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