Measurement and analysis of the absorptance of cryogenic radiometer cavity

Hongbo Liu; Xueshun Shi M.D.; Xingang Zhuang; Pengju Zhang M.D.; Changming Liu; Hengfei Wang; Hongyuan Liu M.D.

doi:10.1117/12.2541416

18 December 2019 Measurement and analysis of the absorptance of cryogenic radiometer cavity

Hongbo Liu, Xueshun Shi M.D., Xingang Zhuang, Pengju Zhang M.D., Changming Liu, Hengfei Wang, Hongyuan Liu M.D.

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113380E (2019) https://doi.org/10.1117/12.2541416
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Cryogenic radiometer is considered as the international benchmark for optical power measurement, which requires the core light radiation receiving device (cavity) has high absorption coefficient over 0.9999 at presented. In this paper, we have developed a new cavity are made of oxygen-free high-conductivity copper (OFHC) cylinder and coated with nickel-phosphorus (NiP) black paint. The cavity absorptance has been experimentally evaluated at different black paints and different structures. The result shows that the inclined bottom cylindrical cavity blackened with nickel-phosphorus black paint achieves an absorptance up to 0.9999964±0.000005; The most significant improvements in uncertainty arise from the enhanced characteristics of the cryogenic radiometer including its higher cavity absorptance and reduced non-equivalence effects.

Citation Download Citation

Hongbo Liu, Xueshun Shi M.D., Xingang Zhuang, Pengju Zhang M.D., Changming Liu, Hengfei Wang, and Hongyuan Liu M.D. "Measurement and analysis of the absorptance of cryogenic radiometer cavity", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113380E (18 December 2019); https://doi.org/10.1117/12.2541416

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available