| Summary: | 碩士 === 逢甲大學 === 電機工程所 === 99 === This paper studies to design of shortwave infrared zoom lens, analyzes radiant intensity of image and the resolution of image by Non Sequential Ray Tracing. So, it could reduce the cost of development and also decrease the time of research. This research uses the U.S patent No.4854681 for the initial structure. The final design result is zoom lens with four groups where are positive, negative, positive, and positive power. The system is constituted with eleven lenses, it include three aspheric lenses. It focal length is from 24.619mm to 146.588mm, respond the wide-angle mode to the telephoto mode. On the axis, the modulation transfer function (MTF) at 20lp/mm is greater than 0.3. Off the axis, the MTF is greater than 0.2. The relative illumination is over 90%. The distortion is below 5%. And through the tolerance analysis, we verify the system’s production.
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