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:
Apr. 07, 1998
Filed:
Jul. 17, 1996
James H Burge, Tucson, AZ (US);
David S Anderson, Tucson, AZ (US);
Rayleigh Optical Corporation, Tucson, AZ (US);
Abstract
An interferometer including a test plate member having a computer-generated hologram (CGH) written on the reference surface. In a preferred testing configuration, the interferometer setup includes a laser light source, diverger lens, beamsplitters, collimators, and other auxiliary optics arranged in a common-path (Fizeau-type) configuration to minimize measurement errors for testing an optical test piece with the test plate member having the computer-generated hologram. By having the computer-generated hologram written directly on the reference surface of the test plate member, the measurement of aspheric optical surfaces is made with greater precision, more efficient, and with less cost than prior art interferometers and associated methods.