Differential high accuracy refraction measuring apparatus: DHARMA – a new source of cryogenic refractive index measurements

Douglas B. Leviton

doi:10.1117/12.3028394

1 October 2024 Differential high accuracy refraction measuring apparatus: DHARMA – a new source of cryogenic refractive index measurements

Douglas B. Leviton

Author Affiliations +

Proceedings Volume 13131, Current Developments in Lens Design and Optical Engineering XXV; 1313102 (2024) https://doi.org/10.1117/12.3028394
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

This paper announces the development of a new, cryogenic refractometer at Leviton Metrology Solutions in Boulder, CO known as the Differential High Accuracy Refraction Measuring Apparatus, or DHARMA, which is nearing completion. DHARMA has been developed in part to provide a commercially-available source of cryogenic, refractive index measurements of similar or better quality to those provided by the CHARMS facility at NASA’s Goddard Space Flight Center. It was also conceived to provide the same the state-of-the art capabilities as CHARMS but extending into the long wave infrared (LWIR) where there is a growing need for such measurements. DHARMA’s basic design is presented along with preliminary data for measurements of cryogenic, absolute, refractive index for several prisms previously measured using CHARMS.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Douglas B. Leviton "Differential high accuracy refraction measuring apparatus: DHARMA – a new source of cryogenic refractive index measurements", Proc. SPIE 13131, Current Developments in Lens Design and Optical Engineering XXV, 1313102 (1 October 2024); https://doi.org/10.1117/12.3028394

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