Accession Number : AD0607577

Title :   CALIBRATION OF DIVIDED CIRCLES,

Corporate Author : TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF

Personal Author(s) : Popelka,M. F. ,Jr. ; Smith,M.

Report Date : 27 MAY 1960

Pagination or Media Count : 37

Abstract : Calibration of angular devices, such as rotary tables, optical dividing heads, and gyro turntables, requires the utmost care and precision. Since these devices often serve as fundamental measurement standards in testing and evaluating precision gyros and accelerometers, their calibration is of basic importance. A study was therefore undertaken to investigate the techniques and limitations associated with precision angular measurements. The results of and the procedures used in the calibration of a Leitz optical dividing head and a Fecker multimode turntable are described in this report to acquaint the reader with the calibration techniques presently used in the Space Technology Laboratories, Inc., Inertial Equipment Laboratory and to discuss their advantages and accuracy limitations. Brief descriptions of the equipment which was calibrated and the operating principles of the standards employed are included. (Author)

Descriptors :   (*CALIBRATION, THEODOLITES), (*INERTIAL GUIDANCE, INSTRUMENTATION), OPTICAL INSTRUMENTS, COLLIMATORS, ERRORS, RINGS

Distribution Statement : APPROVED FOR PUBLIC RELEASE