System and method for safe introduction of laser external indicator light

Abstract

The invention relates to a system and method for safe introduction of external indicating light of a laser. The system comprises an indicating light source, a first reflector, a lens group, a second reflector, a light path switching assembly and a light path switching alarm. Indicating light emitted by the indicating light source sequentially passes through the first reflector, the lens group andthe second reflector. The indicating light reflected by the second reflector and the main laser of the laser are coaxial and have the same divergence angle. The second reflector can be connected to ordisconnected from a main laser light path under the action of the light path switching assembly; and the light path switching alarm is arranged in the indicating light path reflected by the first reflector and is located behind the second reflector. The indicating light is introduced into the main laser light path through the lens group and the total reflection mirror, and the indicating light switching alarm device is configured. The output power of the indicating light is adjustable and is coaxial with the main laser light, and the divergence angle of the indicating light is the same as that of the main laser light, thereby improving the positioning effect of the indicating light, reducing the maintenance difficulty and cost, and eliminating the potential safety hazards caused by systemfaults.

Description

technical field [0001] The invention belongs to the field of laser safety protection, and relates to a safety introduction system and method for an external indicator light of a laser. Background technique [0002] Lasers have been widely used in industrial processing and high-tech fields due to their high orientation and high brightness. However, the thermal effects, biological hazards, and secondary radiation hazards of lasers cannot be ignored. The International Electrotechnical Commission (I EC60825-1) divides lasers into several safety levels according to laser wavelength, output power / energy, pulse width, etc., to distinguish the degree of hazard and the matters that users need to pay attention to. [0003] The direct hazards of lasers to the human body and the working environment mainly include direct light, reflected light, and diffuse scattered light. For invisible lasers, especially medium and high-power invisible lasers, the role of indicator light is particularly...

AI Technical Summary

Problems solved by technology

The indicator light is generally coupled to the main laser optical path by combining beams. Due to the limitation of the internal space of the laser, the output power of the indicator light source is usually not too high. When encountering a complex optical path, the indicator light can be seen after being reflected and transmitted by a large number of optical elements. The effect becomes worse, which is not conducive to auxiliary positioning and safety protection

In addition, due to the high integration of the laser package, the indicator light source often needs to be returned to the factory for inspection after the failure of the light source, which increases the difficulty and cost of maintenance.

[0005] The existing external indicator light source is mainly introduced through beam combining, and the beam combining mirror or coupler is in the main laser light path, which puts forward requirements on the wavelength transmission / reflection characteristics and anti-laser damage performance of the beam combining device. It is not conducive to the safe implementation of laser experiments, especially strong laser experiments

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