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在视频喉镜的设计过程中,会遇到显示屏上有杂散光等杂质的问题。针对此问题,利用Trace Pro光学仿真软件模拟光路状态,设计了一种光学结构。该结构采用尺寸为4.5 mm×18 mm CMOS传感器采集图像,像元尺寸为1.75μm×1.75μm。传感器放置在尺寸为9 mm×10 mm的喉镜弯头中,实现了视频喉镜要求的大视角(80°)、短焦距(2.8 mm)、长工作距离(10 cm)、无杂质的光学特性。该结构设计合理,通过测试,其成像图像清晰,在照度符合规定的情况下,视角内无反射光斑和杂质,达到了消除杂散光、提高图像质量的目的。
In the video laryngoscope design process, you will encounter the display of stray light and other impurities. In response to this problem, an optical structure was designed using the optical path simulation software Trace Pro. The structure uses a 4.5 mm × 18 mm CMOS sensor to capture images with a pixel size of 1.75 μm × 1.75 μm. The sensor was placed in a laryngoscope elbow measuring 9 mm × 10 mm and achieved the wide angle of view (80 °), short focal length (2.8 mm), long working distance (10 cm), no-impurity optics characteristic. The structure is designed reasonably and passed the test. The imaging image is clear. Under the condition of illuminance compliance, there is no reflection spot and impurity in the view angle, so as to eliminate the stray light and improve the image quality.