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:
Oct. 19, 1999
Filed:
Oct. 24, 1997
Applicant:
Inventors:
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
359599 ; 359601 ; 359614 ; 359831 ; 359836 ;
Abstract
A prism has a notch at a lower end of a third reflection plane of a pentagonal roof prism. The notch has a frosted wall, on which a transparent plate is adhered with adhesive. A miniature prism is adhered to the transparent plate with adhesive. The adhesive has photo-transmissibility, so that a transparent plane is formed between the pentagonal prism, the transparent plate and the miniature prism. Information displayed by an indication device is directed to an eyepiece optical system, via a mirror and the miniature prism.