摘要
介绍为日本冈山天文台１．８８ｍ镜红外相机（ＯＡＳＩＳ）研制的红外偏振器．该偏振器与ＯＡＳＩＳ配备可实现～４．１′视场的近红外成像偏振观测．偏振器包括可旋转的消色差半波片和固定的致冷偏振片，通过旋转半波片对入射光的调制取得线偏振测量．实际观测给出ＪＨＫ波段的偏振效率分别为８６．３％、９７．０％和９７．５％．
A near infrared polarimeter developed for the infrared camera OASIS of Okayama Observatory, Japan, is introduced in this paper. The polarimetric imaging can be formed in a field of view of ～4.1′ by attaching the polarimeter to the OASIS. The polarimeter consists of a rotatable achromatic half wave plate and a fixed cooled polarizer. Linear polarization measurements can be carried out via the modulation of the half wave plate. Test observations show that the polarization efficiencies in the J, H and K wavebands are 86.3%, 97.0% and 97.5%, respectively. Comparisons of OASIS polarimetry with previous observations are also presented.
出处
《天文学报》
CSCD
北大核心
1999年第2期213-222,共10页
Acta Astronomica Sinica
基金
国家自然科学基金
中国科学院"九五"基础性研究重点项目
