Impact of assembly error of cascade prism on beam scanning precision

Anhu Li; Wei Gong

doi:10.1117/12.2319557

19 September 2018 Impact of assembly error of cascade prism on beam scanning precision

Anhu Li, Wei Gong

Proceedings Volume 10747, Optical System Alignment, Tolerancing, and Verification XII; 107470M (2018) https://doi.org/10.1117/12.2319557
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

In this paper, the position error modeling of the three-element Risley-prism beam scan system is established and the exact expressions of the beam pointing errors are derived by ray tracing based on the Snell’s law. The impacts of the tilt error of three-element prisms and the tilt error of the bearing position on the beam pointing accuracy are graphically presented with analytical and numerical results. According to the given pointing accuracy requirements, the allowable limit values of assembly errors are calculated, which is of practical significance for improving the design level of threeelement prisms. The analysis method in this paper is universal for the analysis of the assembly error of other cascade prisms.

Citation Download Citation

Anhu Li and Wei Gong "Impact of assembly error of cascade prism on beam scanning precision", Proc. SPIE 10747, Optical System Alignment, Tolerancing, and Verification XII, 107470M (19 September 2018); https://doi.org/10.1117/12.2319557

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KEYWORDS

Prisms

Error analysis

Refractive index

Ray tracing

Assembly tolerances

Bismuth

Lithium

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