RU1801362C - Device for laser therapy - Google Patents

Abstract

The invention relates to medical equipment. The purpose of the invention is to provide operational control of the dosage of the therapeutic effect. The device contains a laser 1, a polarization filter 2, a light guide (C) 3, two photosensors 5 and 6 (Ф). A beam splitter plate 4 is placed between C 3 and F 5. 2 ill.

Description

The invention relates to laser physiotherapeutic devices and can be used for individually draining laser irradiation of tissue and organ surfaces, as well as for diagnosing their condition.

The aim of the invention is to provide operational control of the dosage of the therapeutic effect.

Figure 1 presents a block diagram of a device; figure 2 - photosensor.

The laser therapy device comprises a laser radiation source 1, a filter polarizer 2, a fiber optic light guide 3, a beam splitter plate 4, photosensors 5 and 6, and in addition a comparison unit 7 connected to the first outputs of the photosensors 5 and 6, as well as a stabilizer a grounded power supply 8 connected to the second outputs of the photosensors.

The output of the comparison unit 7 is connected to the registration unit 9, which can be connected to the processor 10. In front of the bioobject 11, an adjustment screen 12 is placed. The photosensor 5 (6) (Fig. 2) contains a housing 13 inside which a photodiode 14 with an electrical connector 15 is installed. Adjustable a diaphragm 16. a diffuser plate 17 and a narrow-band filter 18.

The laser beam from the source 1 passes through the filter-polarizer 2, the fiber-optic fiber 3 enters the beam splitter plate 4, which divides the beam I into two beams: the reference II and the working III. The reference beam II, having an intensity of 5-8% of the beam I, enters sequentially on the light filter 16. the light scattering plate 15, the diaphragm 14 and the photodiode 12 of the photosensor 5 of the reference channel. The working beam III enters the irradiation surface 11, and the laser radiation scattered and reflected from the irradiated surface partially enters the photosensor 6 and passes through the narrow-band filter, the diaphragm that diffuses the plate, and enters its photodiode.

It should be noted that the optimal light spot sizes after switching on the laser radiation source are achieved by changing the distance from the distal end of the optical fiber 3 to the irradiated surface 11, covered by a screen 12. The optimal radiation power density is established using a filter polarizer 2 and standalone power meter. Optimal sensitivity of photo recording

The system is installed as follows. With the closed controlled diaphragms of the photosensors 5 and 6 and the stabilized power supply 8 turned on

the electric zero of the photodiodes is set to the dark current using the elements of the comparison circuit (the characteristics of the photodiodes should be as identical as possible). Then, the controlled diagram of the photosensor 5 is opened so that the intensity of the part of the reference beam II incident on the photodiode is sufficient for its output to the linear portion of the nameplate characteristic. Setting on

5 of the irradiation surface 11 of the successively black and white fields of the screen 12, the light-scattering characteristics of which are accepted as reference, and by changing the degree of opening of the controlled apertures of the photosensors 5 and 6 using the registration unit 9, the necessary difference in the electrical signals of the black and white levels is achieved. It is known that the power of laser radiation due to various physical

The 5 processes in the radiation source 1 do not remain constant even during the procedure, with power fluctuations reaching 15% or more. In the proposed device, a change in the intensity of the laser radiation source for this reason, as well as any other occurring in the optical circuit to the beam splitter plate 4, cause synchronous changes in the intensity of the reference III and the working And rays, and

5 - consequently, a synchronous change in antiphase photocurrents in the photodiodes of the photosensors 5 and 6, does not lead to a change in the difference signal at the output of the comparison unit 7 (under the condition that the photodiodes work

0 on linear sections of characteristics). A change in the electrical signal at the output of the comparison unit 7 appears only in case of a change in the light intensity of the reflected and scattered surface 11

5 exposures. The use of such a scheme makes it possible to significantly increase the sensitivity of the photo-recording system of the device while improving the signal-to-noise ratio and introduce automatic compensation for all changes in the parameters of the lighting part of the device. Device for laser therapy, real-time monitoring of the state of the irradiated tissue by coefficient

5 reflection of light from the irradiated surface. This allows, on the basis of an individual dosage, to significantly increase the therapeutic effect of the irradiation procedure and to avoid the negative effects associated with overdose.

Claims (1)

SUMMARY OF THE INVENTION A laser therapy device comprising a laser radiation source, a dividing plate, a light guide and two photosensors that are connected to a comparison unit connected to a recording unit, characterized in that, in order to ensure operational monitoring of the dosage of the therapeutic effect, it is provided with a quotation screen, filter-polarizer, installed between is0 a laser radiation point and a fiber optic fiber and a stabilized power source, wherein a beam splitter plate is placed between the output end of the fiber and the first photosensor, and each of the photosensors is made in the form of a narrow-band filter coaxially mounted in the cylindrical body, a light scattering plate, an adjustable diaphragm and photodiode //// 7 /////////////////////////////// // // 7 Editor A. Behr Compiled by N. Washkovsk Tehred M. Morgenthal Corrector M. Demchik K & I0KGM 7 8