Optical design of wide-angle large-relative-aperture f-θ lens
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摘要: 激光扫描系统中f-透镜是必不可少的部件，针对目前国内激光扫描系统工作面小、测量速度慢、测量精度低等缺点，设计出一种大视场大相对孔径f-透镜以改善以往系统的不足，提高工作效率。设计中透镜是一种负畸变透镜，属于像方远心光路，预期参数为2=60，D=120 mm，f=500 mm。经过计算后，利用Zemax软件对f-透镜模型进行了优化设计，得到艾里斑直径3.514 m，扫描范围为500 mm500 mm，相对孔径为6/25的大工作面大相对孔径的f-透镜，成像清晰，优化结果达到了预期的设计指标。Abstract: The f- lens is an important essential component in laser scanning systems. For the shortcomings of current domestic laser scanning systems such as small working surface , slow measuring speed , low measurement accuracy, a large field of view(FOV) f- lens was designed with large relative aperture to improve the working efficiency. The designed lens is a negative distortion lens with the image space telecentric optical path. Expected parameters are as follows: 2=60，D=120 mm，f=500 mm. After calculation, the Zemax software was used to optimize the design for f- lens model. Finally ,a large-working-area large-relative-aperture f- lens was obtainde with an Airy disk diameter of 3.514m, a scanning range of 500 mm500 mm and an aperture of 6/25. The image is clear, the optimization results achieve the expected design target.
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Keywords:
- optical design /
- large relative aperture /
- large FOV /
- laser scanning /
- f-θ lens
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