1. Technique for measuring very small angle changes
- Author
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Jeremiah Kloepfer, Robert Gibb, and Robert Yuen
- Subjects
Materials science ,business.industry ,Test fixture ,Optical testing ,Flight control surfaces ,Atomic and Molecular Physics, and Optics ,Interferometry ,Autocollimation ,Optics ,Angular stability ,Electrical and Electronic Engineering ,business ,Engineering (miscellaneous) ,Optomechanics - Abstract
A method for making accurate and precise measurements of small angles is described using an interferometer and a test fixture with reference control surfaces. The test is relatively insensitive to test fixture alignment. Typical measurement uncertainties are better than 0.2 arcsec ( 1 σ ). This technique is applicable for verifying the angular stability of opto-mechanical systems that must undergo rigorous environmental testing.
- Published
- 2020