Surface relief measuring equipment

Details Surface relief measuring equipment Surface relief measuring equipment

1980-12-08

1984-02-21

Chin, Gary

Boots, shoes, and leggings

73105, G01B 706

Patent

active

044333862

ABSTRACT:
Surface relief analyzing equipment comprises a turntable and an audio frequency pick-up including a stylus. A substrate bearing the surface relief is rotated on the turntable at a fixed frequency and and analogue electrical signal produced at a pick-up transducer is passed through an a-d converter. Digital data is processed to produce an input to a display for registering a pictorial representation of the surface relief.

REFERENCES:
patent: 3670153 (1972-06-01), Rempert et al.
patent: 3683273 (1972-08-01), Behr et al.
patent: 3720818 (1973-03-01), Spragg et al.
patent: 3968681 (1976-07-01), Cornforth et al.
patent: 4126036 (1978-11-01), Nilan et al.
patent: 4133204 (1979-01-01), Mittleman
patent: 4154530 (1979-05-01), Connolly, Jr. et al.
patent: 4162528 (1979-07-01), Maldonado et al.
patent: 4328553 (1982-05-01), Fredriksen et al.
"A Comparison of Methods for Accurate Film Thickness Measurement" by King et al., Published in Journal of Physics E. Scientific Instruments 1972, vol. 5, pp. 445-449.

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