Accession Number : ADP002488

Title :   An Instrument for Automated Measurement of the Angles of Cut of Doubly Rotated Quartz Crystals,


Personal Author(s) : Chambers,J. L.

Report Date : 1983

Pagination or Media Count : 9

Abstract : An automated x-ray orientation system for accurate measurement of the angles of cut of both singly and doubly rotated quartz crystal plates is described. The instrument is capable of determining the conventional phi and theta angles-of-cut to a one-standard-deviation precision of 3 - 4 seconds of arc and is capable of measuring the general orientation of any cut on the bulk-wave zero-temperature-coefficient locus. Blanks are assumed to be pre-cut to within 15 minutes of the desired angles-of-cut. The instrument, a laser-assisted Laue diffractometer, has been in operation for approximately one year. Thousands of measurements have been made on both singly and doubly rotated cuts of quartz, as well as other crystalline materials, with excellent results. Automatic handling equipment is currently being added, which will permit the instrument to run unattended for up to 16 hours.

Descriptors :   *Quartz, *Angles, *Measuring instruments, Cutting, Crystals, Lasers, Diffractometers, Automation, Measurement, X ray spectra

Distribution Statement : APPROVED FOR PUBLIC RELEASE