The first aluminum coating of the 3700mm primary mirror of the Devasthal Optical Telescope

2016 ◽  
Author(s):  
Krishna Reddy Bheemireddy ◽  
Maheswar Gopinathan ◽  
Jayshreekar Pant ◽  
Amitesh Omar ◽  
Brijesh Kumar ◽  
...  
Keyword(s):  
Aluminum Coating ◽  
Optical Telescope ◽  
Primary Mirror

Perspectives on primary mirror figure control for a space-based optical telescope

2000 ◽  
Author(s):  
Douglas C. Neam ◽  
Paul A. Lightsey ◽  
James H. Crocker
Keyword(s):  
Optical Telescope ◽  
Primary Mirror

Recent Progress of Active Support System for Large Optical Telescope Primary Mirror

2018 ◽  
Vol 55 (10) ◽  
pp. 100002
Author(s):  
徐宏 Xu Hong ◽  
杨利伟 Yang Liwei ◽  
杨会生 Yang Huisheng
Keyword(s):  
Support System ◽  
Recent Progress ◽  
Optical Telescope ◽  
Primary Mirror

scholarly journals Optical telescope with Cassegrain metasurfaces

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3263-3269 ◽  
Author(s):  
Xuan Liu ◽  
Junhong Deng ◽  
King Fai Li ◽  
Mingke Jin ◽  
Yutao Tang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Incident Light ◽  
Astronomical Observation ◽  
Optical Telescope ◽  
Circularly Polarized ◽  
Primary Mirror ◽  
Secondary Mirror ◽  
Infrared Wavelengths ◽  
Cassegrain Telescope ◽  
Imaging Properties

AbstractThe Cassegrain telescope, made of a concave primary mirror and a convex secondary mirror, is widely utilized for modern astronomical observation. However, the existence of curved mirrors inevitably results in bulky configurations. Here, we propose a new design of the miniaturized Cassegrain telescope by replacing the curved mirrors with planar reflective metasurfaces. The focusing and imaging properties of the Cassegrain metasurface telescopes are experimentally verified for circularly polarized incident light at near infrared wavelengths. The concept of the metasurface telescopes can be employed for applications in telescopes working at infrared, Terahertz, and microwave and even radio frequencies.

Thermal control of primary mirror of Space Solar Telescope

Optik ◽  
2021 ◽  
Vol 229 ◽  
pp. 166290
Author(s):  
Shuang Yang ◽  
Changshuai Du ◽  
Xianwei Yang ◽  
Chunlong Liu ◽  
Yan Xiong ◽  
...  
Keyword(s):  
Thermal Control ◽  
Solar Telescope ◽  
Primary Mirror ◽  
Space Solar Telescope

scholarly journals The Swift Ultra-Violet/Optical Telescope

2005 ◽  
Vol 120 (3-4) ◽  
pp. 95-142 ◽  
Author(s):  
Peter W. A. Roming ◽  
Thomas E. Kennedy ◽  
Keith O. Mason ◽  
John A. Nousek ◽  
Lindy Ahr ◽  
...  
Keyword(s):  
Ultra Violet ◽  
Optical Telescope

scholarly journals ESA’s X-Ray Astronomy Mission, XMM

1990 ◽  
Vol 123 ◽  
pp. 129-140
Author(s):  
B.G. Taylor ◽  
A. Peacock
Keyword(s):  
Resolving Power ◽  
Science Program ◽  
Eccentric Orbit ◽  
Ccd Cameras ◽  
Optical Telescope ◽  
X Ray ◽  
Medium Resolution ◽  
Reflection Gratings ◽  
Better Than

AbstractESA’s X-ray Astronomy Mission, XMM, scheduled for launch in 1998, is the second of four cornerstones of ESA’s long term science program Horizon 2000. Covering the range from about 0.1 to 10 keV, it will provide a high throughput of 5000 cm2 at 7 keV with three independant telescopes, and have a spatial resolution better than 30 arcsec. Broadband spectrophotometry is provided by CCD cameras while reflection gratings provide medium resolution spectroscopy (resolving power of about 400) in the range 0.3–3 keV. Long uninterrupted observations will be made from the 24 hr period, highly eccentric orbit, reaching a sensitivity approaching 10−15 erg cm−2 s−1 in one orbit. A 30 cm UV/optical telescope is bore-sighted with the x-ray telescopes to provide simultaneous optical counterparts to the numerous serendipitous X-ray sources which will be detected during every observation.

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