用于光学触控定位的光学装置

Optical device for optical touch positioning

Abstract

The utility model provides an optical device for optical touch positioning. The optical device comprises an infrared linear light source assembly which is arranged at the bottom and two sides of a touch area and actively emits light; the infrared linear light source assembly comprises a luminous source and an optical oscillating cavity which is provided with only one light emergent port; the luminous source is arranged in the optical oscillating cavity; and the infrared linear light source assembly also comprises a light diffusion plate and a secondary light distribution lens, wherein the light diffusion plate is arranged at the light emergent port of the optical oscillating cavity, and the secondary light distribution lens is arranged between the luminous source and the light diffusion plate. According to the optical device, infrared light emitted by the luminous source is secondarily distributed through the secondary light distribution lens, so that the optical device emits light uniformly; and the light diffusion plate is added at a position where the light emergent port is located, so that the light field is further homogenized, a really uniformly luminous infrared linear light source is provided for touch equipment, the stability and the accuracy of touch positioning are improved, and error triggering is reduced.
本实用新型提供一种用于光学触控定位的光学装置,包括设置在触控区域的底边及两侧边的主动发光的红外线状光源组件,该红外线状光源组件包括发光光源、只有一个出光口的光学振荡腔,所述发光光源安装在所述光学振荡腔内,所述红外线状光源组件还包括光扩散板、二次配光透镜,所述光扩散板设置于所述光学振荡腔的出光口处,所述二次配光透镜设置于所述发光光源以及光扩散板之间。本实用新型的光学装置,通过二次配光透镜对发光光源所发出的红外光进行二次配光,使其发光更加均匀;并且在出光口处加入光扩散板,进一步的匀化光场,为触控设备提供一个真正意义上的均匀发光的红外线状光源,从而提高了触控定位的稳定性及准确性,减少了误触发。

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