Optical apparatus for inspecting laser texture

Details Optical apparatus for inspecting laser texture Optical apparatus for inspecting laser texture

1996-09-23

1997-12-16

Font, Frank G.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356351, G01B 902

Patent

active

056991606

ABSTRACT:
Inspection apparatus for determining the profile of textured spots extending in a pattern along a surface of a magnetic disk includes an interferometer which illuminates first and second, adjacently disposed test spots on the surface. The disk and the interferometer are moved, relative to one another, so that one of the test spots traverses the textured spots in the pattern while the other test spot is moved along a flat portion of the disk surface. In one embodiment, the inspection apparatus is built into the device forming the textured spots, providing feedback controlling the texturing process.

REFERENCES:
patent: 4650330 (1987-03-01), Fujita
patent: 5392116 (1995-02-01), Makosch
patent: 5469259 (1995-11-01), Golby et al.
patent: 5598265 (1997-01-01), De Groot

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