Design and analysis of miniature high-resolution omnidirectional gaze optical imaging system |
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Authors: | Shuai Liu Yan-xiong Niu |
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Institution: | 1.School of Instrumentation Science and Opto-electroncis Engineering,Beijing University of Aeronautics and Astronautics,Beijing,China;2.Precision Opto-mechatronics Technology Key Laboratory of Education Ministry,Beijing,China |
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Abstract: | A miniature high-resolution omnidirectional gaze optical imaging system comprising one optical low-pass filter and 5 lens elements with just one aspheric surface was successfully designed. The total tracking length of the system is 14.7 mm and fit on a 5MPx 2/3in CCD with 2448?×?2050 pixel of 3.45 μm for the full 360°?×?200° imaging. We introduced the difficulties in the design of ultrawide field of view system and proposed specific computations to overcome them by aberration theories, furthermore making a simulated analysis and performance evaluation using ZEMAX optical design software. The result shows that an admirable corrected field curvature along with a low F-theta distortion, and a perfect lateral and longitudinal color aberration correction were achieved; relative illumination of all field is over 68%; when the ambient temperature changes from ?40 to 70 ℃, the modulation transfer function performs in a steady range at 75 lp/mm; all of these will promote the wide-field lens application in medical, automotive, and stereo vision. |
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