Optical design of image stabilizing Cassegrain-like balloon-borne telescope

被引：0

作者：

Kataza, Hirokazu ^{[1
]}

Kamizuka, Takafumi ^{[1
]}

Watanabe, Kentaroh ^{[1
]}

Murakami, Hiroshi ^{[1
]}

Wada, Takehiko ^{[1
]}

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

来源：

GROUND-BASED AND AIRBORNE TELESCOPES II, PTS 1-3 | 2008年 / 7012卷

关键词：

Balloon-borne telescope; optical design; image stabilizer; Tera-GATE;

D O I：

10.1117/12.788730

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe the optical design of balloon-borne telescope with an image stabilizing secondary mirror which correct the pointing error of the attitude control system and enable a long-time exposure. We adopted a Cassegrain-like two-mirror system, and investigated the best mirror surface figure by surveying Conic constant (K) of the primary mirror from -1 to 0, where the secondary mirror is a high order aspheric surface to cancel spherical aberration at each K. In the small pointing error region, the classical Cassegrain system (K=-1) provides a wide field of view. However, in the large pointing error region, systems with large K provide a wide FOV. For lambda t (target wavelength) =50 mu m and 69cm aperture, a spherical primary system has acceptable optical performances when we assume the pointing error around 0.3 degree.

引用

页数：8