其它/Others
【Shelyak】Lhires III光谱仪
发表时间:2016-04-08  浏览次数:

Lhires III

Lhires III+Lhires III is a very high resolution spectrograph designed for amateur and educational astronomy. Numerous projects are within reach thanks to the technology involved in this instrument. Professional/amateur collaborations have been done with Lhires III spectrographs.

* power of resolution R ~18000
* resolution of 0.035nm near Halpha
* wavelength selected by micrometer
* mirror slit 15-35µm, reflective for guiding
(other slits available in option)
* Schmidt-Cassegrain telescope adapter delivered in standard (two inch available)
* NEW: internal argon-neon or neon lamp for calibration
* NEW: internal tungsten for flat
* NEW: motorised calibration for remote operations
* NEW: improved C-mount guiding port (focal ratio: 0.8x)

The guiding camera backfocus range is 15.5mm to 21mm with a C-thread (1inch diameter, 32 threads per inch).
* switchable grating modules (2400 gr/mm in standard; 1800 gr/mm, 1200 gr/mm, 600 gr/mm, 300 gr/mm and 150 gr/mm in option)
* possibility to put an eyepiece
* photo tripod adapter available for public outreach (visual solar spectrum)


See those videos showing the new Lhires III improvements:
https://www.flickr.com/photos/shelyak/15749051516/
https://www.flickr.com/photos/shelyak/15587255898/


The Lhires III upgrade kit manual shows how to perform the upgrade on an existing Lhires III specrograph; click here to download it.


See otherwise our detailed page on Lhires III


Our manual and some other documents are on our documentation page.

Look at the thesis done with a Lhires III by Benjamin G. Jenkins, Georgia State University:
A Study of the Lhires III Spectrograph on the Hard Labor Creek Observatory 20 inch Telescope
URL: http://scholarworks.gsu.edu/phy_astr_theses/12/

Lot of users are showing their results on Spectro-L Yahoo discussion group or ARAS forum so you may want to start from there:
Spectro-L : http://tech.groups.yahoo.com/group/spectro-l/
ARAS forum: http://www.spectro-aras.com/forum/

Of course, Christian Buil - original designer with us of the Lhires III - has an intensive web site full of informations and provide a free ISIS software to reduce your spectral data, see also ISIS tutorial:
http://www.astrosurf.com/buil/
http://www.astrosurf.com/buil/isis/isis_en.htm
http://www.astrosurf.com/buil/isis/guide_lhires/tuto1_en.htm

There is an Exposure Time Calculator for Lhires III (ETCL) which should help you finding the best exposure time based on your equipment, location, target and of course grating used - this tool has been developped and correlated with actuall performance measurement with Lhires III spectrographs:
http://www.astrosurf.com/buil/etcl2/etcl_en.htm