Non-ghost-image laser device

Abstract

The invention discloses a non-ghost-image laser device including a front shell, a rear shell, a laser lens and a laser emitter assembly. The front shell is connected with the rear shell fixedly and an airtight inner cavity is formed between the front shell and the rear shell. The laser lens and the laser emitter assembly are arranged in the airtight inner cavity. The laser lens includes a fixed structure and a boss structure comprising an incident face and an exit face that are parallel to each other and both forming an included angle with a fixed face. Laser emitted by the laser emitter assembly leaves from the incident face and the exit face of the boss structure. According to the invention, by arranging the boss structure on the laser lens, ghost images generated by the laser is reflected to other parts in the inner cavity of the laser device, so that secondary or multiple reflection is not formed and light exit ghost images are eliminated. Besides, a laser lens does not need to be placed in a tilt manner, so that space occupancy can also be saved in the meantime of eliminating ghost images.

Description

technical field [0001] The invention relates to a laser device, in particular to a ghost-free laser device. Background technique [0002] Ghost image refers to the additional image generated near the focal plane of the optical system due to surface reflection. Its brightness is generally dark and staggered from the original image. Ghost images often appear in laser products and affect the use effect. Most laser products in the prior art eliminate ghost images by placing the plane lens obliquely, but placing the plane lens obliquely will take up more product space and cause space. Waste is also not conducive to making the product smaller and thinner. Moreover, the existing laser products generally fix the laser lens on the laser transmitter assembly. The protection level of such laser products is generally IP54, and they cannot work normally or cannot work in places where the use environment is relatively harsh, so they are not very good. to meet customer needs. Contents ...

AI Technical Summary

Problems solved by technology

Ghost images often appear in laser products and affect the use effect. Most laser products in the prior art eliminate ghost images by placing the plane lens obliquely, but placing the plane lens obliquely will take up more product space and cause space. Waste is not conducive to making the product smaller and thinner

Moreover, the existing laser products generally fix the laser lens on the laser transmitter assembly. The protection level of such laser products is generally IP54, and they cannot work normally or cannot work in places where the use environment is relatively harsh, so they are not very good. to meet customer needs

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