360-degree transmission type free-form surface shaping laser module and design method of free-form surface transmitting mirror in 360-degree transmission type free-form surface shaping laser module

Abstract

The invention relates to a 360-degree transmission type free-form surface shaping laser module and a design method of a free-form surface transmitting mirror in the 360-degree transmission type free-form surface shaping laser module. The 360-degree transmission type free-form surface shaping laser module includes a lens cone, a semiconductor laser positioned at one end of the lens cone, a transmission mirror mounting seat positioned in the middle of the lens cone and a reflector mounting seat positioned at the other end of the lens cone. A conical surface reflecting mirror with the taper of 45degrees is mounted on the reflecting mirror mounting seat, a quartz tube is embedded in the side surface of the lens cone, and the quartz tube and the conical surface reflecting mirror are arranged at a same horizontal position. A free-form surface transmission mirror is arranged on the transmission mirror mounting base and is cylindrical, a first free-form surface and a second free-form surfaceare arranged at the two ends of the free-form surface transmitting mirror and are formed by combining various curved surfaces, and the curved surfaces forming the first free-form surface and the second free-form surface comprise but are not limited to an off-axis aspheric surface and a hyperboloid. According to the invention, the effect of reducing the energy loss in the beam shaping process, is realized.

Description

technical field [0001] The invention relates to the field of laser shaping, in particular to a 360-degree transmission free-form surface shaping laser module and a design method of the free-form surface transmission mirror. Background technique [0002] Laser line meter, also known as laser line marking instrument or laser level, is a type of measuring instrument made by installing and fixing a laser module on the telescope of an ordinary level instrument. During use, The laser line projector emits a laser beam, so that the laser beam passes through the laser module to form a laser surface to project a horizontal laser line, so as to achieve the purpose of measurement and calibration, and is widely used in construction operations. [0003] In the prior art, the Chinese utility model patent with the notification number CN202485678U discloses a laser marking module suitable for generating 360-degree surround lines, which includes: a laser module, located in front of the laser ...

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: in the process of actual use, the laser is generally provided by a semiconductor laser. Due to the characteristics of its own light emitting principle, the light spot produced by the laser is generally elliptical, and the elliptical light spot passes through the conical reflector. After reflection, it is easy to cause a large difference in the laser light at each position after reflection, resulting in too large a difference in brightness at each point

However, after the elliptical spot passes through the aperture, about 60% of the energy is blocked by the aperture and cannot reach the mirror, which often requires a laser with a higher power to achieve the same brightness, but the power is too high The laser often leads to increased heat generation, and also increases possible safety hazards during use

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