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:
Nov. 17, 1998
Filed:
Apr. 17, 1997
Applicant:
Inventors:
Atsushi Katsunuma, Saitama-ken, JP;
Kazuaki Sato, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359426 ; 359383 ; 359407 ;
Abstract
An optical system which is telecentric to an image, having an objective optical system for forming a model image based on rays from the model magnified by a predetermined ratio to an actual object. An eyepiece lens is included for observing the model image formed through the objective optical system. The distance between the objective optical system and the eyepiece lens is varied so that a visual impression obtained by observing the model image through the eyepiece lens becomes substantially equal to a visual impression obtained by observing the actual object directly with the eyes.