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- W2023972425 abstract "Modern missile domes are up to 7 inches in diameter, subtending an angular aperture of 180 degrees. Quantifying the transmitted wavefront of these domes is critical for quality control, but such optics are diffcult or impossible to measure using conventional interferometric techniques. To address this issue, we have developed a non-contact measurement process that uses a technology similar to optical coherence tomography (OCT) to map the optical thickness of the dome over its full aperture. The technique has been termed Scanning Low Coherence Dual Interferometry (SLCDI), and has the unique ability to measure the optical thickness of component layers within multilayer domes to an accuracy of 0.1 micron. In this paper we demonstrate the capability of SLCDI by measuring the optical thickness of a seven inch diameter BK7 dome at a sampling resolution of 0.2 mm. SLCDI yields results comparable to those from a Zygo interferometer, and the two methods agree to within 0.2 micron. From this we conclude that SLCDI is an effective tool for measuring the optical quality of hemispheric domes." @default.
- W2023972425 created "2016-06-24" @default.
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- W2023972425 date "2007-04-27" @default.
- W2023972425 modified "2023-09-23" @default.
- W2023972425 title "Transmitted wavefront metrology of hemispheric domes using scanning low-coherence dual-interferometry (SLCDI)" @default.
- W2023972425 doi "https://doi.org/10.1117/12.718737" @default.
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