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:
Jun. 15, 1993
Filed:
Dec. 10, 1991
Michael Mager, San Jose, CA (US);
Guzik Technical Enterprises, Inc., San Jose, CA (US);
Abstract
An apparatus for calibration of optical flying-height testers includes a calibrated micropositioner (100), having a base surface (102) which is permanently attached to a flat horizontal platform (106) and a top surface (104). A transducing head (108) is rigidly, but removably, mounted onto the top surface of the micropositioner. A convex bottom surface (114) of a transparent lens (112), supported on screws (116, 118, and 120), is positioned directly above the transducing head. The lens is preloaded against the tips of the screws by springs (124, 126, and 128). A prism (132) is centrally positioned onto a flat top surface (130) of the lens. The prism contains working planes (136 and 138) which serve as light-energy entrance and exit surfaces and a planar bottom surface (142) which maintains optical contact with the flat top surface of the lens.