Instrumentation, Techniques, and Measurement

Enhanced roll-angle measurement interferometer

[+] Author Affiliations
Aisong Ju, Wenmei Hou, Yanfen Le

University of Shanghai for Science and Technology, School of Optical-Electrical and Computer Engineering, No. 516, Jungong Road, Yangpu District, Shanghai 200093, China

Opt. Eng. 54(3), 034101 (Mar 02, 2015). doi:10.1117/1.OE.54.3.034101
History: Received December 9, 2014; Accepted February 4, 2015
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Abstract.  A roll-angle measurement interferometer with good stability and high sensitivity is presented. In the system, two sets of spatial parallel beams with different frequencies are formed with the help of a Koster prism, a corner cube, a quarter-wave plate, a wedge prism, and a wedge mirror. The wedge prism is used for the roll-angle sensing component, the roll of which will cause the changes of the optical path of the two beams with different frequencies. This interferometer complies with the principle of common path which minimizes the dead path; the cross talk of straightness, pitch, and yaw errors are avoided in this specific structure which enhances the stability and precision of the measurement. The experimental result fits well with the theoretical analysis and a measurement resolution of 2μrad is achieved with an electronic interpolation of 2π/512.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Aisong Ju ; Wenmei Hou and Yanfen Le
"Enhanced roll-angle measurement interferometer", Opt. Eng. 54(3), 034101 (Mar 02, 2015). ; http://dx.doi.org/10.1117/1.OE.54.3.034101


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