Automated X-ray sorting machine for round quartz blanks

Author

Bradaczek, Hans

Author_Institution

Inst. fur Kristallographie, Freie Univ. Berlin, Germany

fYear

1991

fDate

29-31 May 1991

Firstpage

114

Lastpage

116

Abstract

An X-ray machine which allows the sorting of quartz blanks at the beginning of the manufacturing process is presented. The cycle time is about 5 s, with an X-ray exposure time of 2 s. The standard deviation of this instrument is about 6" of arc. Blanks can be sorted into 25 boxes, each of typically 15" of arc. The range of the cutting angle is about ±5° around the AT-cut. A PC-AT 386-25 computer controls measurements. Movements are controlled by a CNC (computer numerical control) device. Sophisticated statistical programs allow a permanent observation of the sorting process

Keywords

X-ray crystallography apparatus; X-ray diffraction examination of materials; X-ray diffractometers; computerised instrumentation; crystal resonators; inspection; microcomputer applications; quartz; 2 s; 5 s; AT-cut; PC-AT 386-25; X-ray sorting machine; computer controlled measurement; computer numerical control; quartz blanks sorting; round quartz blanks; Collimators; Face detection; Instruments; Lattices; Optical reflection; Oscillators; Sorting; X-ray detection; X-ray detectors; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control, 1991., Proceedings of the 45th Annual Symposium on

Conference_Location

Los Angeles, CA

Print_ISBN

0-87942-658-6

Type

conf

DOI

10.1109/FREQ.1991.145891

Filename

145891