Apparatus to measure conical thickness

Details Apparatus to measure conical thickness Apparatus to measure conical thickness

1984-05-07

1985-10-15

Howell, Kyle L.

Surgery

Truss

Pad

A61B 1000

Patent

active

045467730

ABSTRACT:
An apparatus is disclosed for measuring the thickness of the cornea and for regulating the depth of a surgical blade in relation to the local corneal thickness. Corneal thickness is measured by first directing ultrasonic pulses towards the cornea and timing the interval between reflected pulses. The apparatus also includes a pulse stretcher for enlarging the width of the pulse representing the interval between pulses reflected from the inner and the outer surfaces of the cornea, so that the time between pulses can be accurately measured by a conventional, low-frequency electronic clock. The invention further comprises electronic gating means for rejecting spurious pulses.

REFERENCES:
patent: 2708847 (1951-05-01), Esterman
patent: 3232099 (1966-02-01), Motchenbacher
patent: 3827287 (1974-08-01), Boggs et al.
patent: 4108165 (1978-08-01), Kopp et al.
patent: 4205682 (1980-06-01), Crock et al.
patent: 4213464 (1980-07-01), Katz et al.
patent: 4261367 (1981-04-01), Freese
Wells, P. N. T., "Ultrasonics in Clinical Diagnosis", Churchill Livingstone, N.Y. 1977, pp. 87-96.
Giglio, E. J. et al., "A Hand-Held Probe for Acoustic Coupling in UTS Intraocular Distance Measurement in Children", Ame. Jrnl of Optom. V48(1971), pp. 1025-1030.

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