親子觀星會

雷射層析調適光學


==
APOD


http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap180518.html

(http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/image/1805/DJI_0058_1024px.jpg)

極大望遠鏡的上空。在這個天文台4座雷射導星設備測試時發射的雷射光束，終極的目標是要產生人造導星，來消除大氣湍流產生的散焦效應

https://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/4lgsf/

(https://www.eso.org/public/archives/static/teles-instr/vlt/images/eso1613a_pano.jpg)

http://mpbcommunications.com/en/site/news/news_releases/stories/innovationspreis.html
(http://mpbcommunications.com/images/news_images/16fkc16776-cc-2.jpg)
4 Laser Guide Star Facility on ESO's Very Large Telescope (VLT)

VLT Adaptive Optics Facility

http://slideplayer.com/slide/8024073/

自適應性光學系統  Keck
(https://www.photonics.com/images/Web/Articles/2018/3/28/Optics_IR.jpg)

https://www.photonics.com/a63271/Adaptive_Optics_Look_Farther_Than_Ever_Before


IR images of the planet Uranus without adaptive optics (left) and with adaptive optics (right). Observations at the W.M. Keck Observatory at two different wavelengths: 2.2 μm emphasizing the rings of Uranus (top row) and 1.6 μm emphasizing cloud features (bottom row). Courtesy of Heidi Hammel and Imke de Pater; W.M. Keck Observatory.

https://www.facebook.com/familystar.org.tw/photos/pcb.10152714610822185/10152714609742185/?type=3&theater

(https://scontent.ftpe7-2.fna.fbcdn.net/v/t1.0-9/11702746_10152714609742185_6575324023067396668_n.jpg?_nc_fx=ftpe7-3&_nc_cat=0&_nc_eui2=AeEb_B_jK7gkrbs5TvMcwu3n7aPPvtp6ngj7HMSTahOagrOLeobEK1yfdK2WuWqPc6ZiwVh8pdueoe3SG09BJcwnTA5MsITLfGIU1L_7uqr3OA&oh=631966ce9f90714bd260469fff6273c2&oe=5B8E3E7F)

VLT  使用是   4 Laser Guide Star Facility


WIKI

https://zh.wikipedia.org/wiki/%E8%87%AA%E9%80%82%E5%BA%94%E5%85%89%E5%AD%A6

雷射層析調適光學 A ground-layer adaptive optics system

由於人工導星的路徑和目標星的光線路徑並不重合，大氣湍動造成的相位扭曲並不完全相同。解決辦法是製造多顆人工導星，
這稱為雷射層析調適光學。計劃安裝在雙子望遠鏡上的多重共軛調適光學系統將製造5顆人工引導星。
同時為了得到矯正較大的視場，可以應用多塊變形鏡，共軛在不同的高度。

這被稱為多共軛調適光學系統 Multi-Conjugate Adaptive Optics (MCAO)  ，如三十米望遠鏡項目採用了兩個變形鏡，
分別共軛在地面和11公里高空，以及6束雷射導星。

http://www.ctio.noao.edu/~atokovin/tutorial/part5/mcao.html
Multi-Conjugate Adaptive Optics

(http://www.ctio.noao.edu/~atokovin/tutorial/part5/mcaoidea.gif)

ELT  LASER  
https://medium.com/starts-with-a-bang/a-new-record-nears-the-worlds-largest-telescope-prepares-for-completion-98708097af8b
 => http://familystar.org.tw/index.php?option=com_smf&Itemid=59&topic=13962.new#new