PROJECTOR
COMPUTER
STELLARIUM360
COMPENDIUM
SOFTWARE
DOME
VIDEOS
LIFE WITH
Contacts:
Yves LHOUMEAU
(Optics-Linux)

Lionel RUIZ
(Software-Videos)

Olivier NIVOIX
(Software-Linux)
More than 150
LSS-planetariums
worldwide!

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Lhoumeau Sky System
BEAMER
LSS-BLOC
CONDENSOR
ADJUSTMENT
TRUNCATED
Lhoumeau Sky System - The project  
PROJECTION

To project an image into a dome, you'll need :

  • a computer to broadcast/generate pictures (realtime sky simulator)
  • a videoprojector to project these pictures
  • an additionnal optical lens to perform the correct display onto the surface
We can add a sound system to complete the immersive projection.

Optical system

The principle of LSS is similar to digiscoping. the additionnal optical aims to:

1°) focus the picture in a small area (typically the size of a postage stamp). A simple camera lens in front of a beamer can get an image like this:






2°) Bend the beam and re-project the picture using a fisheye lens on the dome. 

Note: the projector is absolutly unchanged. This design allows great flexibillity in the choice of many elements and developements

example of bloc with 2 objectives

Notes: Choice and meticulous optical alignment is essential for the quality of the resulting picture. The projection angle can reach between 140 to 180 deg. The use of argentic photographics lens can give also good results.

Yves LHOUMEAU
© 2016 LSS Group - Yves LHOUMEAU & Lionel RUIZ