Share Email Print
cover

Proceedings Paper

Unbalanced nulling interferometer with four-quadrant phase mask
Author(s): Takuji Kobayashi; Jun Nishikawa; Yosuke Tanaka; Takashi Kurokawa; Ken Kashiwagi; Naoshi Murakami; Naoshi Baba; Nobuyuki Hashimoto
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

One of the problems for direct observation of extrasolar planets is the speckle noise due to a wave-front error. Therefore, high-accuracy adaptive optics is required for realizing a wavefront quality of λ/10000 rms. An unbalanced nulling interferometer has a possibility to assist high-accuracy correction. In this paper, we propose the interferometer with a four-quadrant phase mask in which an optical path is common. By using the mask, we succeed in stabilizing the interference and taking measurements of wavefront errors with 10-times higher sensitivity. In this way, we expect to construct high-accuracy adaptive optics which is more stable.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213D (17 October 2012); doi: 10.1117/12.975179
Show Author Affiliations
Takuji Kobayashi, Tokyo Univ. of Agriculture and Technology (Japan)
National Astronomical Observatory of Japan (Japan)
Jun Nishikawa, National Astronomical Observatory of Japan (Japan)
Yosuke Tanaka, Tokyo Univ. of Agriculture and Technology (Japan)
Takashi Kurokawa, Tokyo Univ. of Agriculture and Technology (Japan)
Ken Kashiwagi, Tokyo Univ. of Agriculture and Technology (Japan)
Naoshi Murakami, Hokkaido Univ. (Japan)
Naoshi Baba, Hokkaido Univ. (Japan)
Nobuyuki Hashimoto, Citizen Holdings Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

© SPIE. Terms of Use
Back to Top