High-precision line scale, as the benchmark of the dissemination of quantity in length measurement, is being widely used in processing and calibration of precision instruments. The key for tracing measurement of line scale templates is to achieve high-precision alignment of the linear ruler. In order to perform the traceable measurement of 2-D Line Scale templates, we designed a kind of 2-D dynamic photoelectric microscope that can realize high resolution aim at the crosswire. When the templates moves unidirectionally with uniform speed, the corresponding crosswire will be imaged in the two slits successively. Then the light signal is converted into an identical electrical signal by the photomultiplier tube. Finally using laser interferometer ambient parameter monitor and laser wavelength compensation , the high-precision calibration of 2- D line scale templates can be realized. The measurement uncertainty can reach U=(0.1+0.1L)μm(k=3,L:m).
The Optical capability of visible light transmittance is studied on this paper. The system is based on the
principle of cross-correlation detection, and measure the transmittance of visible light Optical system
though the way of dual-channels, compare to the previous way, eliminate the error of measuring many
times, and restrain the noise signal more effectively. Moreover, the whole system can work on the
conditions of light field. And monitoring and dealing with the result in real-time. The testing accuracy
reaches 1%.
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