Study On Light-Source Design And Control Technique Of Physiotherapy System Of Compound Light

Light therapy, as a sort of physiotherapy, has been used successfully in clinic. However current phototherapy apparatus, whose transmitted peak wavelength or luminescent mode can not be changed during therapy, have deficiencies in applicability and curative effect. The reason is that human body, as a sophisticated huge system, has different reflecting power and absorbency to different light wavelength. And there are also differences in optical character between different tissues. In order to resolve above problems, the idea of therapy using compound light is proposed. Meanwhile, a sort of physiotherapy system of compound light is developed based on this idea. Peak wavelength and luminescent mode of the physiotherapy system can be adjusted as required. Laser technology is also used in the units.At first, history and development of light therapy are introduced in this paper. After spectrum measurement of different phototherapy apparatus in different range, a conclusion be drawn that the light spectrum, ranges from 600nm to 6μm, has high medical value. So the compound light physiotherapy system would use just these lights. In this paper, biological effects of compound light are researched on cellular or molecule level in different range, including biological effects of low level laser. The application of far infrared ray in sub-therapy of cancer is also been introduced specially. In all, the study on biological effects of light have established theoretical foundation for development of compound light physiotherapy system.In order to duplicate the spectrum from 600nm to 6μm, tungsten-halogen lamp with wide spectral range is used as light source. We can module its power by switching flicker frequency, so to change the transmitted peak wavelength and stimulating frequency. Semiconductor laser, whose wavelength is 650nm in red light range, is also an important part of the physiotherapy system. It and...