Visual sensibility measuring apparatus of interferometer
专利汇可以提供Visual sensibility measuring apparatus of interferometer专利检索，专利查询，专利分析的服务。并且PURPOSE: To achieve the improvement in measurement accuracy and reliability by controlling interference fringe scanning speeds and making the output frequency of a photoelectric transducer corresponding to the brightness and darkness of interference fringe constant.
CONSTITUTION: Laser light from a light source 1 forms an interference fringe by becoming two sets of rays which go through a beam splitter 3, reflecting mirror 6, reflecting mirror 8 provided on a movable base 8, etc. This inteference fringe is scanned by a turning mirror 12 and is detected by a photoelectric transducer 15, from which it is passed through a zero crossing detecting differentiation circuit 16 and a pulse generator 17, which in turn generates pulses at the maximum and minimum of the detection signal. These pulses are applied together with the reference pulse of a reference pulse generating circuit 19 to a difference frequency detection circuit 20. Hence, the scanning speed of the mirror 12 through the circuit 21 is controlled to a constant value according to the frequency of the reference pulse of the circuit 19 and the detection signal of the transducer 15 becomes a constant frequency. As a result, the measurement of high accuracy and high reliability free from the inclination and optical path difference of the beam spliiter 3, reflecting mirrors 6, 8 and the decrease owing to the change in background light may be per formed
COPYRIGHT: (C)1979,JPO&Japio，下面是Visual sensibility measuring apparatus of interferometer专利的具体信息内容。
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