The advantages of Fluid Optics are many and very significant. One can quote among them:

• focusing and colinearisation of wide sources or several sources

• addition of the powers and the mixture of luminous spectra coming from several sources

• the drastic filtering of the infra-red

The studies are simpler to realize and then, traditional curves such as parabolas and ellipses are used.

These curves remarkably function with point sources.

Simulation 2D of an ellipse focusing the light coming from a point source

Unfortunately, the sources of light are never point sources and results expected with traditional curves and wide sources of light are rarely obtained.

Simulation 2D of elliptic reflector functioning with a source wide and highlighted of focusing by sensor of enumeration

MEGALUX never regards the sources as being point sources and uses neither of paraboloids nor of ellipsoids.

The state of the art cannot add the powers or mix the luminous spectra coming from several sources (that amounts to the same thing) only by crossing distinct beams with a given distance.

Thanks to Fluid Optics, MEGALUX can conceive optics which add the powers of several sources of light.

It is, according to our knowledge, the most powerful projector in the world!!!

Laboratory model of a projector

" PHARE DOUX "

of a total power of 50 000 Watts

Presented to the 23rd Geneva International Exhibition of Inventions, this projector received three distinctions of which the gold medal of the international jury with congratulations of the jury.

The emission of heat limits the luminous power of the traditional systems, especially whenever the illuminated subject is sensitive to the temperature.

However, this emission of heat is mainly due to the infra-red emitted by the sources of light usually used.

Diagrammatic representation of a Xenon source spectrum

The state of the art tries to solve the thermal problem generated by the infra-red by several processes:

• lthe defocusing of the source, which causes to send less light but which decreases the output,

• the use of heat absorbing glasses, but they do not tolerate nevertheless very high temperatures,

• the use of dichroic deposits whose principal defect is to function in an optimal way only for a given incidence.

The infra-red filters designed by MEGALUX make it possible to be freed from these disadvantages.

Infra-red energy will break up in the selected fluid which will warm up. It is advisable to renew it and to cool it using a pump and of one or more ventilators, even a system with cryogenics for very strong powers.

The effect of filtering by the fluids which we use is particularly effective:

B: Flange of the reflector

C: Face of the filter

D: Fluid

E: Beam (output of the system)

Representation of the change of the temperature along an optical path using a bulb with tungsten filament of 2 500W and a dynamic fluid optics.

It is noted that, in this case, fluid optics cause a drop in the temperature from 1015°C to 40°C.

The fluid is selected according to parameters such as luminous bandwidth or conditions of use. This fluid is not dangerous and prohibits any development of micro-organisms.

This document is the property of MEGALUX and cannot be reproduced without its authorization.