Accession Number : ADD009315

Title :   Analog Correction of Quartz Resonator Angle of Cut.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,Arthur

Report Date : 25 Mar 1982

Pagination or Media Count : 9

Abstract : The angle of cut of a quartz resonator blank is corrected by a photolytic etching technique whereby an intensity gradient of photon energy is developed across the surface crystal blank which is to be corrected. The intensity gradient is generated by means of a lens system located intermediate a photon source and the crystal blank the surface of which has been treated with a photolytic etchant. The lens system includes at least one lens having a region of variable transmissivity of photon energy so that the amount of photon energy impinging on the crystal determines the depth of surface erosion. Additionally, the etching operation is controlled by means of a programmed digital computer which controls the contour of the face being etched upon receiving feedback information from X-ray apparatus which examines and monitors the etching for providing closed-loop control. (Author)

Descriptors :   *Patent applications, *Quartz resonators, *Analog systems, *Corrections, Angles, Cutting, Closed loop systems, Control, Lenses, Gradients, Inventions, Intensity, Photolysis, Photons, Etching, Digital computers, Computer programming

Subject Categories : Electrical and Electronic Equipment
      Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE