Rayleigh laser guide star systems: UnISIS bow-tie shutter and CCD39 wavefront camera

被引：5

作者：

Thompson, LA

Teare, SW

Crawford, SL

Leach, RW

机构：

[1] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[2] New Mexico Inst Min & Technol, Dept Elect Engn, Socorro, NM 87801 USA

[3] New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA

[4] San Diego State Univ, Dept Astron, San Diego, CA 92182 USA

[5] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[6] San Diego State Univ, Astron Res Cameras Inc, San Diego, CA 92182 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2002年 / 114卷 / 800期

关键词：

D O I：

10.1086/342764

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Laser guide star systems based on Rayleigh scattering require some means to deal with the flash of low-altitude laser light that follows immediately after each laser pulse. These systems also need a fast shutter to isolate the high-altitude portion of the focused laser beam to make it appear starlike to the wavefront sensor. We describe how these tasks are accomplished with UnISIS, the Rayleigh laser-guided adaptive optics system at the Mount Wilson Observatory 2.5 m telescope. We use several methods: a 10,000 revolution per minute rotating disk, dichroics, a fast sweep and clear mode of the CCD readout electronics on a 10 mus timescale, and a Pockel's cell shutter system. The Pockel's cell shutter would be conventional in design if the laser light were naturally polarized, but the UnISIS 351 nm laser is unpolarized. Therefore, we have designed and put into operation a dual Pockel's cell shutter in a unique bow-tie arrangement.

引用

页码：1143 / 1149

页数：7