15 December 1978 Interferometric Measurement Of Large Aperture Infrared Windows
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A versatile interferometer has been designed and built to evaluate infrared windows as large as 51 cm in diameter. Transmitted wavefront measurements may be made with an accuracy of 0.05λ peak-to-valley at 10.6 µm. Variations in refractive index of transmitting materials as small as 5 x 10-6 may be measured and mapped. Through the use of an auxiliary mirror, systems or components requiring a spherical wavefront at f/6 or slower may also be tested.
© (1978) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Albert F. Slomba, "Interferometric Measurement Of Large Aperture Infrared Windows", Proc. SPIE 0153, Advances in Optical Metrology I, (15 December 1978); doi: 10.1117/12.938217; https://doi.org/10.1117/12.938217

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