Title :
Automated X-ray sorting machine for round quartz blanks
Author_Institution :
Inst. fur Kristallographie, Freie Univ. Berlin, Germany
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;
Conference_Titel :
Frequency Control, 1991., Proceedings of the 45th Annual Symposium on
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-87942-658-6
DOI :
10.1109/FREQ.1991.145891
