Proceedings PaperAn Instrument For Production Testing Of Telescopes, Binoculars And Sights Using MTF, Glare And Transmission Criteria
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The choice of suitable criteria for production testing of binoculars and similar afocal systems is discussed and the conclusion is arrived at that the measurement of MTF at a single spatial frequency in all azimuths, on-axis and for one field point, in conjunction with measurements of "scatter index" (glare) and axial transmission factor forms the basis of an adequate production test. An instrument is described embodying this test philosophy. The instrument is designed so that it can be used by relatively unskilled workshop personnel and acceptance or rejection of a system under test is indicated by means of lights. The results of preliminary field trials of the instrument are described.