3 November 1983 Segmented Mirror Edge Alignment Sensor
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Developments are reported which establish a basis for the precision alignment of the segmented optical elements of a large, multipanel telescope. The apparatus described in this paper employs a form of Young's double slit interferometer and a CCD photodetector array to obtain a measure of the step as well as the gap between adjacent mirror segments. A simple adjunct to this arrangement can also provide a means for measuring the relative angle between the normals at the edges of adjoining mirror segments. Despite the preliminary nature of the developments reported herein, the sensor is based on well-known principles and the critical criteria for establishing a viable sensor system have been established experimentally. The parameters of adjacent mirror segment step, gap, and relative angle can all be measured with but a single sensor.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. W. Gillard, C. W. Gillard, N. E. Buholz, N. E. Buholz, L. Davis, L. Davis, P. E. Perkins, P. E. Perkins, } "Segmented Mirror Edge Alignment Sensor", Proc. SPIE 0444, Advanced Technology Optical Telescopes II, (3 November 1983); doi: 10.1117/12.937990; https://doi.org/10.1117/12.937990


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