Optical zooming and focusing lens, mechanical structure and optical structure thereof and using method of optical structure

Abstract

The invention discloses an optical zooming and focusing lens, a mechanical structure and an optical structure thereof and a using method of the optical structure. According to the optical structure of the zooming and focusing laser lens, a collimating lens composed of two lenses and a focusing lens composed of two lenses are creatively used to carry out zooming and focusing independently, the design flexibility is greatly improved, and the design process is simplified. According to the mechanical structure of the zooming and focusing laser lens, a sleeve type mechanical structure of a lens frame sleeve cam made of a self-lubricating material is creatively used for replacing a traditional mechanical structure, and the mechanical structure is simple and small in size; and a sliding block and a sleeve are in surface contact, the thermal conductivity of self-lubricating materials such as graphite is extremely good, the thermal conductivity of the structure is greatly improved, water cooling can be conveniently performed in the sleeve in the heat conduction structure, the cooling problem of the system is thoroughly solved, and the limitation of the thermal problem on the maximum service power of the system is eliminated.

Description

technical field [0001] The invention belongs to the field of laser processing, and in particular relates to an optical zoom focusing lens and its mechanical structure, optical structure and usage method. Background technique [0002] In the process of laser processing, in order to meet the processing requirements of different materials and materials with different thicknesses, it is often necessary to adjust the size of the laser spot and the height of the laser spot relative to the processing surface according to the process requirements. The former is called zooming, which is realized by changing the focal length of the optical system in the device, only changing the spot size, not changing the spot position; the latter is called focusing, not changing the spot size, only changing the spot position. In the laser processing system, the laser optical lens system usually adopts a combination structure of collimating lens and focusing lens, that is, the collimating lens conver...

AI Technical Summary

Problems solved by technology

[0007] 3. Due to the imperfection of optical lens coating technology, the scattered light level of the current high-power film is not less than 0.2%, which means that the stray light produced by each individual glass lens is not less than 0.4%. Obviously, in the optical system , the increase in the number of glass lenses means the increase in heat-generating stray light

[0010] In the laser optical system, due to the light scattering caused by the absorption and scattering of the lens itself and the imperfect coating on the lens surface, the temperature of the lens and the lens frame sealed inside the cam will rise, and the thermal conductivity of the linear bearing is poor, the lens and the lens The heat on the frame can only be transferred to the cam through the air, and the cam will also generate heat under the action of light. Part of the heat on the cam is transferred to the base through the bearing, and part of the heat is transferred through the air. Because the cooling usually acts directly on the base Yes, rolling bearings are also poor heat conductors, which makes cooling design very difficult

Due to the poor heat dissipation effect of this traditional structure, the power used by the zoom head is limited, or the reliability of the optical system is deteriorated when the power is used, and in severe cases, the performance will be reduced, such as the thermal lens effect.

In addition, this structure will lead to complex structure of the mechanical system, difficult installation, large size

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