Controlled depth penetrant apparatus and method

Details Controlled depth penetrant apparatus and method Controlled depth penetrant apparatus and method

1981-03-05

1987-06-23

Thaler, Michael H.

Surgery

Truss

Pad

83881, A61B 1732

Patent

active

046745033

ABSTRACT:
A penetrant apparatus for controlling the depth that a penetrant device penetrates a material relative to its outer surface, where the cross-sectional thickness of the material is not susceptible to caliper-type measurement because its inner surface is inaccessible except by intrusive means, and a method for penetrating the material utilizing the apparatus. The apparatus comprises a penetrant device connected to and driven by driving apparatus, depth sensing apparatus, thickness sensing apparatus, and comparator apparatus. The depth sensing apparatus determines the depth of penetration of the penetrant device into the material while the thickness sensing apparatus determines the thickness of the material between its inner and outer surfaces. The comparator apparatus is connected to the depth sensing apparatus, the thickness sensing apparatus, and the driving apparatus and compares the depth of penetration of the penetrant device to the thickness of the material and control the driving apparatus so that the depth of penetration of the penetrant device relative to the material's outer surface so as to leave unpenetrated a portion of the material adjacent the inner surface.

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Schachar et al, "Radial Keratotomy", Chapter XXIII, pp. 201-212 (1980).

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