A helium-neon laser treatment device and its preparation method

Abstract

The invention discloses a helium-neon laser treatment device and a manufacturing method thereof. In the device, 2-6 flat helium-neon laser tubes are arranged in parallel; after being emitted by the laser tubes, laser light is reflected by a group of 45-degree plane mirrors; reflected light beams get close in parallel, and enter an optical fiber coupler consisting of a coupler body, a lens, an optical fiber positioning socket and an optical fiber plug inserted into the optical fiber positioning socket; one end of the optical fiber plug is connected with an optical fiber; and a main discharging circuit in a laser power supply consists of a voltage doubling circuit and a high-voltage current regulating circuit. In the helium-neon laser treatment device, multiple beams of laser light are coupled to a quartz optical fiber of which the core diameter is less than 0.6 millimeter for outputting and irradiating on a focus of infection. The helium-neon laser treatment device has the advantages of convenience for using, working stability and reliability, high output power and high coupling efficiency.

Description

Technical field [0001] The invention involves a laser medical device, especially the laser medical device with a flat discharge tube laser as a light source. Background technique [0002] With the development of laser medicine, especially the development of laser physiotherapy and light power therapy, laser laser with a higher power and wavelength of 632.8nm requires the output power of the laser therapy device about 20-30 mile.In order to solve the laser therapy instrument that can output hundreds of millwatts, the invention patent "Focus high -power 氦氖 laser therapy instrument" (Chinese invention patent number: 92103733.3) proposed a plan, which will be 7 ~ 13 (even more even more (even more more than even more.Multi -) generally combination of laser tube, sticking a light -fiber coupling on the laser output reflex of each laser tube, giving the laser output laser energy (also known as coupling) into a very thin fineFiber (about a few millimeters of direct scripture), which com...

AI Technical Summary

Problems solved by technology

[0005] 1. Commercially available 1-meter-long, 30-40 mW He-Ne laser tubes output mostly multi-mode outputs, and they need to be coupled to optical fibers with a core diameter of 0.08-0.3 mW, and the coupling efficiency is low, that is, the loss is large

[0006] 2. The coupler is fixed on the output reflector of the laser tube with adhesive. The former is metal and the latter is glass. The expansion coefficients of the two are very different. It is easy to fall off after long-term use, especially the high temperature inside the machine will affect the work. reliability

[0008] 4. The multi-strand optical fiber output is coupled to the single-strand optical fiber output through the "recoupler", the coupling efficiency is lower, and the thick single-strand optical fiber is hard, which is very inconvenient for users to use

[0009] 5. The output end of the multi-strand optical fiber is optically cold-processed. When the optical fiber enters the body, due to the pollution of body fluids under the action of high power density, the laser output is severely attenuated, and the user cannot reprocess it.

[0010] 6. The multi-strand optical fiber with a coupling head has a high probability of damage. As long as one of the dozens of optical fibers is damaged, the entire optical fiber transmission system needs to be replaced, and the cost of this special optical fiber transmission system is very high.

[0011] 7. There are a lot of laser tubes in the machine (10~20, including spare laser tubes), and the life of the laser tube is limited, so the probability of failure of the whole machine is very high

The high-voltage step-up transformer in this circuit is often damaged due to the influence of factors such as climate, environment, and interlayer insulation strength, and the high-voltage step-up transformer has a large working noise

When the voltage of the mains power grid changes by 10% in this circuit, the working current of the laser tube will change by about 30%. This is because the voltage drop of the laser tube changes very little when the current changes. Generally speaking, the voltage on the current limiting resistor The drop is about half of the voltage drop of the laser tube, so the output power of the laser tube is easy to change significantly with the change of the mains grid voltage

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