I think it is not necessary to use filters in Intense Pulse Light therepy.
Whether you need filters or not mainly depends on 2 topics;
If both spectrae match, there is no need for a filter. Otherwise (that is: the emitter spectrum contains wavelenghts not desired at the target) you'll need filters to adjust the spectrum. N.B.: a filter cannot add missing wavelengths - only bock unwanted parts of the spectrum.
Hope this helps...
Dear Dr. Ashock,
The colleague Dr. Dreher gave a satisfactory conceptual answer. In treatment one has to specify which light wavelength or the band of wavelengths required for therapy. In addition one has to determine the optimum intensity, and dose. These are determined on empirical basis and or theoretical models. here for example the skin and simulation.
It is so that the intense pulsed light sources may emit also light out of the required wavelengths, This may have side effects on the skin as the skin will be subjected to
unnecessary extra light. So, in this case it is better to filter the light incident on the skin.
For more information please refer to the link: http://www.dermnetnz.org/topics/intense-pulsed-light-therapy/
Wish you success
Intense pulsed light based devices can be used safely and effectively for the cosmetic treatment of many vascular lesions, unwanted hair, and pigmented lesions. Individual light pulses have a specific duration, intensity, and spectral distribution allowing for a controlled and confined energy delivery into tissue.
IPL devices have one or two cutoff filters.
These filters ranges are 515, 550, 560, 570, 590, 615, 645, 690, and 755nm and function by blocking emission of shorter wavelength light.
Advantages:-
Effective laser treatments for targeting blood vessels in the skin.
IPL minimizes post procedure downtime substantially. With IPL is to raise the blood vessel temperature high enough to cause its coagulation, leading to its destruction and replacement by fibrous granulation tissue.
I'd like to add one more aspect: If you are using a filter you can control better not only the spectrum at the target site but also the temperature. I guess you are not using LED or laser, that would make filters obsolete anyway. With any other light source, depending on the width of the spectrum you are applying you add extra heat to the target site.
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