Laser bar code scanner with window-reflection prevention structure

一种具有防止视窗反射结构的激光条码扫描仪

Abstract

The utility model provides a laser bar code scanner with a window-reflection prevention structure, which comprises an upper side cover, a lower side cover, a circuit board, a light source, a window, a scanning mirror, a photoelectric converter and a condenser. A rid plate is arranged on the upper side cover and arranged on a propagation path of reflected light thereof according to an angle between the window and light emitted by the light source so as to block a path of the reflected light propagated to the scanning mirror, so that noise caused by decoding of reflected light of the window to the photoelectric converter can be avoided. By the laser bar code scanner with the window-reflection prevention structure, light reflected by the window can be prevented from being received by the photoelectric converter effectively, noise interference during decoding is avoided, and decoding performance of a bar code scanner is improved.
本实用新型提出一种具有防止视窗反射结构的激光条码扫描仪,其包括上侧盖、下侧盖、电路板、光源、视窗、摆镜、光电转换器以及聚光镜,在所述上侧盖上设置有筋板。所述筋板根据视窗与光源射出光之间的角度设置在其反射光传播路径上,阻断反射光向摆镜传播的途径从而避免视窗反射光对光电转换器的解码造成的噪声。本实用新型的激光条码扫描仪,可以有效地阻止从视窗反射回的光被光电转换器接受,避免了解码时的噪声干扰,提高了条码扫描仪的解码性能。

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