Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1991-12-10
1993-06-15
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
356373, 356343, G01B 1100, G01J 102
Patent
active
052204081
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.
REFERENCES:
patent: 4624564 (1986-11-01), Dahlgren
patent: 4674882 (1987-06-01), Dorman et al.
patent: 4681451 (1987-07-01), Guerra et al.
patent: 4826322 (1989-05-01), Philips
patent: 4988194 (1991-01-01), Hara et al.
Guzik Technical Enterprises, Inc.
Pham Hoa G.
Pressman David
Rosenberger Richard A.
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