Paper 13131-1
Paper 13131-1
Differential High Accuracy Refraction Measuring Apparatus: DHARMA – a new source of cryogenic refractive index measurements
20 August 2024 • 8:00 AM - 8:20 AM PDT | Conv. Ctr. Room 16B
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.
Presenter
Leviton Metrology Solutions Inc (United States)
Mr. Leviton was a member of the NASA Goddard Optics Branch since 1983 before retiring from NASA in 2015 after working on missions like the Hubble Space Telescope and the recently commissioned James Webb Space Telescope. He is now President of Leviton Metrology Solutions in Boulder, CO and continues to support NASA missions while also consulting with companies on their metrology needs, developing new technologies for high accuracy angle and position measurement, and building a new cryogenic refractometer in Boulder for ultraviolet through long wave infrared refractive index measurements.