version françaiseSearch
Home / Description - Lhires III
Description - Lhires III
Description - Lhires III
Following a pro-am meeting in Oleron in 2003, Christian Buil and us developped with Christian Buil the Lhires III within the AUDE association.This high resolution spectrograph allow to visually watch the solar spectra with lot of fine details. This is an ideal instrument for clubs and association who organize astronomy days for the public - always interested to better understand messages from the light.
Lhires III spectrograph has been designed for small telescope (typically 8" f/10 telescope) and is then perfectly adapted for backyard astronomy. It can be setup in numerous instruments and you can use several type of CCD camera, webcam, or SLR cameras to record your own spectra.
But Lhires III is also a perfect tool for studying the sky. Students from several universities are learning from this spectrograph. Its design is powerful but simple and one can easily open it to see inside. Assembling the spectrograph is also very educational. Easy to use, it allows practical astrophysic on small telescope.
An unique experience: solar spectra
Lhires III can be use visually, which makes it a great educational tool during astronomy days and public observing sessions. Without telescope, it allow to watch, safely, the solar spectra in very high resolution.
With a video camera or a webcam and a small instrument, Lhires III becomes a spectro-heliograph. One can then image the Sun in multiple wavelength (Ha, HeI, K...) using a scanning technic.
A very high resolution
Lhires III bring very high resolution spectrography to the amateurs at an affordable price. Lot of educational projects around Doppler effect can be done such as::
* Jupiter or Saturn rotation
* Radial velocity of stars
* Star rotation: v.sin(i)
* Spectroscopic binaries
* ...
Easy to use
With the mirror slit, the Lhires III is very easy to use and allow to center and maintain the target into the slit with great precision. A simple webcam allow to guide on bright star. You get the full control of the operation during the exposure and you do not need a state of the art mount to do spectrography!
A multi usage instrument
Almost all CCD cameras, SLR cameras, or simple webcam can be mounted on a Lhires III.
Very convenient: optional grating and support are available to adapt in few seconds your resolution to your project. Fainter objects are accessibles: novae, bright comets... See our performance page.
Go a step further with your Lhires III
Beyond the knowledge that your Lhires III could bring you in the field of astrophysic, this is also a powerfull collaboration tool between amaeurs and professional astronomers: Be stars monitoring, veriable stars...
Specifications
- Littrow design- Résolution (Dl/l) of 17000 around Ha
- 0.012nm dispersion (with 9µm pixels)
- Optimised for f/10 instruments
- Adaptable to all types of instruments
- Several detectors can be mounted: CCD camera, SLR camera, webcam...
- Mirror slit for precise guiding
- Light: 3.7lbs
- Compact: 9.8 x 7.9 x 3.3 inches
A very large user community
Lhires III is widely used all across the World. There is certainly a user near by you! Join the spectroscopist community and share projects and targets on Spectro-L discussion group: http://groups.yahoo.com/group/spectro-l/
Resources
* Le User Guide includes:
-Adjustment procedures
-First steps in spectroscopy
-Some theory
-Some projects
* Notice de montage: Lhires III was originally distributed in kit. The assembling procedure can be useful for you to better understand how Lhires III works inside.
* Some schematics to help you integrate the Lhires III with you own equipment.
* One-page Solar spectrum done by Olivier Garde with his own Lhires.
* Low resolution solar spectrum
* You can fin more information (technical guides...) on the following web sites:
- http://astrosurf.com/thizy/lhires3/
- http://www.astrosurf.org/buil/lhires3/project.htm