03-17-2011, 02:13 AM
The International Liquid Mirror Telescope (ILMT)
is a 4m class telescope project, in which several institutions from different countries are actively involved.
The ILMT uses Liquid Mirror technology : the primary mirror of the telescope is a rotating container with highly-reflecting liquid in it (mercury). The surface of the spinning liquid takes the shape of a paraboloid.
![[عکس: LMT1.jpg]](http://www.aeos.ulg.ac.be/upload/LMT1.jpg)
The ILMT is a promising instrument which can be entirely dedicated to a specific scientific project. Indeed, its low cost makes it a unique survey instrument. As liquid mirror telescopes cannot be tilted, they cannot track like conventional telescopes do. The tracking is done artificially by using a technique called time delayed integration (TDI), which uses a CCD detector that tracks by electronically stepping its pixels. The ILMT will be equipped, at its prime focus, with a time-delay-integration (TDI) corrector capable of imaging a field of 30x30 arcminutes with a resolution better than one arcsecond. The ILMT will carry out direct imagery using a 4K x 4K thinned CCD as the detector working in the TDI mode.
It will be installed at Devasthal (India) where it will monitor a strip of sky of 0.5 degree of declination down to a limiting magnitude of about 23 in the I band in a single integration. This survey will last for about five years. The information will be stored on disks so that the night observations can be coadded with a computer to lead to long equivalent integration times.
منبع : http://www.aeos.ulg.ac.be/LMT
توضیحات بیشتر : http://www.aeos.ulg.ac.be/LMT/instruments.php
http://en.wikipedia.org/wiki/Liquid_mirror
http://science.howstuffworks.com/liquid ... escope.htm
و کلا با این کلید واژه جستجو کنید : Liquid mirror telescope
در کل مطلب بالا میگه یک سطح مایع جیوه رو حول مرکزش میچرخونن تا یه حالت مقطع مخروطی زیرش شکل بگیره ( در واقع مقعر بشه ) و بعد با استفاده از اون به عنوان آینه اصلی یه تلسکوپ می سازند ، البته من فکر می کنم در این حالت تلسکوپ فقط میتونه عمودی قرار بگیره و در کل شبانه روز فقط یک نوار با اندازه میدان دیدش رو میتونه رصد کنه
is a 4m class telescope project, in which several institutions from different countries are actively involved.
The ILMT uses Liquid Mirror technology : the primary mirror of the telescope is a rotating container with highly-reflecting liquid in it (mercury). The surface of the spinning liquid takes the shape of a paraboloid.
The ILMT is a promising instrument which can be entirely dedicated to a specific scientific project. Indeed, its low cost makes it a unique survey instrument. As liquid mirror telescopes cannot be tilted, they cannot track like conventional telescopes do. The tracking is done artificially by using a technique called time delayed integration (TDI), which uses a CCD detector that tracks by electronically stepping its pixels. The ILMT will be equipped, at its prime focus, with a time-delay-integration (TDI) corrector capable of imaging a field of 30x30 arcminutes with a resolution better than one arcsecond. The ILMT will carry out direct imagery using a 4K x 4K thinned CCD as the detector working in the TDI mode.
It will be installed at Devasthal (India) where it will monitor a strip of sky of 0.5 degree of declination down to a limiting magnitude of about 23 in the I band in a single integration. This survey will last for about five years. The information will be stored on disks so that the night observations can be coadded with a computer to lead to long equivalent integration times.
منبع : http://www.aeos.ulg.ac.be/LMT
توضیحات بیشتر : http://www.aeos.ulg.ac.be/LMT/instruments.php
http://en.wikipedia.org/wiki/Liquid_mirror
http://science.howstuffworks.com/liquid ... escope.htm
و کلا با این کلید واژه جستجو کنید : Liquid mirror telescope
در کل مطلب بالا میگه یک سطح مایع جیوه رو حول مرکزش میچرخونن تا یه حالت مقطع مخروطی زیرش شکل بگیره ( در واقع مقعر بشه ) و بعد با استفاده از اون به عنوان آینه اصلی یه تلسکوپ می سازند ، البته من فکر می کنم در این حالت تلسکوپ فقط میتونه عمودی قرار بگیره و در کل شبانه روز فقط یک نوار با اندازه میدان دیدش رو میتونه رصد کنه