India now has Asia's biggest liquid mirror telescope & reflecting telescope скачать в хорошем качестве

India now has Asia's biggest liquid mirror telescope & reflecting telescope

#johnnysdesk #indiamegaprojects #telescope "Scott Buckley - Age of Wonder" is free to use on YouTube with credits.    / musicbyscottb   Music powered by BreakingCopyright:    • 🌁 Cinematic & Epic (Free Music For YouTube...   The 3.6m Devasthal Optical Telescope is a custom-built instrument of great complexity. This telescope has the distinction of being largest telescope in India for study of celestial objects at optical wavelengths. It is a national facility installed at Devasthal in the district of Nainital, India. It was commissioned in the year 2016 and is being maintained and operated by ARIES. The 3.6m DOT facility consists of a modern 3.6 meter optical new technology telescope, a suite of instruments, an Aluminium coating plant, a control room and a data center. The back-end instruments of telescope provide spectral and imaging capabilities at visible and near-infrared bands. The ​technology ​of ​liquid ​mirror ​(LM) ​telescope ​is ​relatively ​simple. ​Three ​components ​are required: ​A ​dish ​containing ​a ​reflecting ​liquid ​metal ​(essentially ​mercury), ​An ​air ​bearing ​on which ​the ​LM ​sits, and ​A ​drive ​system. To ​operate ​the ​air ​bearing ​an ​air ​compressor ​is ​needed. ​However, ​in ​order ​to ​avoid ​any interruption ​of ​the ​mirror ​rotation ​(cf. ​during ​the ​maintenance ​of ​the ​compressed ​air ​system), ​it is ​best ​to ​have ​two ​parallel ​air ​systems. ​Therefore, ​we ​have ​installed ​two ​Air compressors, ​both of ​which ​are ​of ‘High ​quality ​rotary ​screw ​air ​compressor’ ​with ​full ​PLC ​controller ​and ​can deliver ​free ​air ​at ​pressure ​as ​high ​as ​10-13 ​bar, ​needed ​to ​operate ​our ​air ​bearing ​systems. The ​mercury ​mirror ​of ​the ​ILMT ​has ​a ​4 ​meter ​diameter ​with ​an ​aperture ​of ​f/2 ​defined ​by ​the speed ​of ​rotation. ​A ​4Kx4K ​CCD ​camera ​manufactured ​by ​'Spectral ​Instruments' ​and ​which ​can operate ​over ​the ​4000 ​to ​11000 ​Å ​spectral ​range ​(SDSS ​filters ​g', ​r', ​i' ​are ​available), ​will be ​positioned ​at ​the ​prime ​focus ​of ​the ​ILMT ​at ​about ​8m ​above ​the ​mirror. ​The ​mirror ​being parabolic ​in ​shape ​requires ​an ​optical ​corrector ​to ​get ​a ​flat ​focal ​surface ​of ​about ​27 ​arcminute in ​diameter. ​All ​these ​elements ​are ​mechanically ​coupled ​by ​an ​external ​structure ​and ​a ​spider.