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. 03, 1978
Filed:
Nov. 23, 1976
Kiyofumi Matsuda, Musashi-Murayama, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Abstract
The sheared interference fringe of a wavefront from an object under test is obtained by recording on a first hologram the interference fringe formed between a first reference light beam and two light beams having slightly different angles of incidence with respect to the first hologram, recording on a second hologram the interference fringe formed between a second reference light beam and the two light beams reconstructed by an illuminating light beam incident on the first hologram from the same direction as the first reference light beam, placing the first and second holograms thus obtained at a prescribed distance from each other, causing a light beam from the object under test to impinge upon the first hologram from the same direction as the first reference light beam to produce light beams and projecting the produced light beams upon the second hologram for thereby causing the second hologram to produce light beams in the same direction as the second reference light beam.