14 October 2005 Enhanced optical design by distortion control
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Abstract
The control of optical distortion is useful for the design of a variety of optical system. The most popular is the F-theta lens used in laser scanning system to produce a constant scan velocity across the image plane. Many authors have designed during the last 20 years distortion control corrector. Today, many challenging digital imaging system can use distortion the enhanced their imaging capability. A well know example is a reversed telephoto type, if the barrel distortion is increased instead of being corrected; the result is a so-called Fish-eye lens. However, if we control the barrel distortion instead of only increasing it, the resulting system can have enhanced imaging capability. This paper will present some lens design and real system examples that clearly demonstrate how the distortion control can improve the system performances such as resolution. We present innovative optical system which increases the resolution in the field of view of interest to meet the needs of specific applications. One critical issue when we designed using distortion is the optimization management. Like most challenging lens design, the automatic optimization is less reliable. Proper management keeps the lens design within the correct range, which is critical for optimal performance (size, cost, manufacturability). Many lens design presented tailor a custom merit function and approach.
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Simon Thibault, Simon Thibault, Jonny Gauvin, Jonny Gauvin, Michel Doucet, Michel Doucet, Min Wang, Min Wang, "Enhanced optical design by distortion control", Proc. SPIE 5962, Optical Design and Engineering II, 596211 (14 October 2005); doi: 10.1117/12.625151; https://doi.org/10.1117/12.625151
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