Presentation

The Eurofeedback joulemeter is surprising in its simplicity: it is composed of a light-absorbing plate, coupled with a liquid-crystal thermometer. The unit is protected by a small metal cover.
The joulemeter allows users to obtain an objective measurement of the actual light intensity of the pulses emitted by the various machines on the market.
This intensity – or fluence – represents the energy per cm² delivered by the flash lamp.
The joulemeter will allow users to check the level of energy as well as the stability of the light energy emitted by the flash lamps. In this way, users will be able to distinguish between the excellent stability of the energy delivered by Eurofeedback machines and those of other manufacturers.
It is worth noting that the light energy emitted by a machine is a necessary (but, on its own, insufficient) condition for good treatments.
Indeed, other parameters – such as pulse duration – are very important; the duration must in fact be close to the Thermal Relaxation Time (TRT) of the target area being treated.
In EUROFEEDBACK machines, all treatment parameters have been optimised, tested and pre-programmed, so as to guarantee excellent effectiveness in all treatments:
photodepilation, photorejuvenation, treatments for veins and pigmentation, collagen remodelling.

The principle of photodepilation by flash lamp was patented in the United States in 1972. Pulsed light depilation has become more widely available over the last fifteen years.
The photodepilation and photorejuvenation mechanisms were initially developed by laser experts, then improved upon by manufacturers and doctors using flash lamps.
Lasers and flash lamps actually employ the same principle of pulsed light emission.
That light is absorbed and then transformed into heat by a target – this is what is called selective photothermolysis for short-pulse lasers, and selective photocoagulation for flash lamps.
Compared with lasers, professional flash lamps carry with them a number of advantages, indeed, lasers can only emit monochromatic light (i.e. light of a single colour) and are therefore only intended for a single purpose. A different laser is therefore required for each of the photodepilation, photorejuvenation, reduction of uneven pigmentation patches or vascular treatment applications, as well as for collagen remodelling.
All of those applications are available with the flash lamp on Eurofeedback machines because, unlike monochromatic lasers, the spectrum of the light emitted is broad and sufficiently configurable as to be adapted to different applications.
A specific light spectrum corresponds to each application.
The principle usually employed pulsed-light depilation consists in sending a penetrating red light through the skin, which will be absorbed by the dark melanin in the hair bulb, then transformed into heat.
The temperature attained at the base of the hair is such that the coagulation of the germinative tissues (papilla and sheath) is brought about, leading to the death of the hairs that are in the anagenous stage (100% eliminated).
The other hairs being at the catagenous or telogenous stage will continue their growth cycle; this is why several sessions are essential to achieving an exceptionally good result.
Note that the use of poor-quality flash lamps can have the opposite effect to that sought. Indeed, some machines can provoke paradoxical regrowth, i.e. transform downy hair into coarse hair.
That is why it is important to turn to professionals recognised for choosing powerful, high-performance and high-quality machines.

(1) on 90% of hairs after 5 treatment sessions