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:
Mar. 17, 1998
Filed:
Apr. 02, 1996
Takahisa Jitsuno, Mino, JP;
Nobuaki Nakashima, Suita, JP;
Masahiro Nakatsuka, Ikoma, JP;
Keiu Tokumura, Osaka, JP;
Nippon Aspherical Lens Co., Ltd., Osaka, JP;
Abstract
The invention counterbalances the defects of optical glass and optical plastic so as to realize a high precision aspherical processing. The optical lens 1 includes a matrix 2 of optical glass and a coating of optical resin material applied to the surface of the matrix 2. A reflective wavefront of a lens plane 4 of the optical lens 1 is measured by means of a interferometer 5. The wavefront from the interferometer 5 is monitored by a computer system 7 to provide monitoring information. The lens plane 4 is irradiated or scanned with a short wavelength, ultraviolet laser beam L in accordance with the monitoring information, whereby the lens plane 4 is processed with the ultraviolet laser beam in non-contact manner into a shape to provide a most appropriate reflective wavefront.