АВТОМАТИЗОВАНИЙ ПАРАМЕТРИЧНИЙ СИНТЕЗ ФОТООБ’ЄКТИВА З ВИПРАВЛЕНОЮ ДИСТОРСІЄЮ
Journal Title: BULLETIN of Kyiv Polytechnic Institute. Series INSTRUMENT MAKING - Year 2018, Vol 56, Issue 56
Abstract
Almost complete correction of distortion is required in a variety of optoelectronic devices in which optical systems create real images. The star trackers containing matrix image sensors are an example of such devices. Since the star trackers are installed on satellites or spacecrafts, it is desirable to avoid extra energy assumption due to necessity of applying digital processing techniques for correction of the image distortion. For such devices, it is reasonable to use the lenses which have distortion reduced to a practically zero level by optical means. Since the aberration of distortion has a nonlinear dependence on field, it can be corrected mostly in multi-lens systems. Unfortunately, the approach to optical design based on the 3rd order aberration theory does not take into account highorder aberrations. Another widely-used method based on local optimization requires to apply initial optical systems with already satisfactory image quality. This paper describes the implementation of automated optical design of lenses with reduced distortion by using of one of modern global optimization algorithms, namely, the adaptive Cauchy differential evolution algorithm. By using specialized optical design software, an experimental verification of the feasibility of the proposed approach has been fulfilled in a completely automated mode. The computer simulation of a parametric synthesis process has been done on an example of the orthoscopic lens, similar to one already patented. The lens, which was selected for a comparison study, has the focal length of 100 mm, the angular field of view of 8.4°, the relative aperture of 1:1.8 and the working spectral range of 0.404 to 0.706 μm. The level of its residual relative distortion over the entire field does not exceed 0.02%. The obtained results indicate that the image quality of two found solutions exceeds the image quality of the prototype lens indicated in the patent
Authors and Affiliations
Viacheslav Sokurenko, Dmytro Bondarchuk
Keywords
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- EP ID EP568275
- DOI 10.20535/1970.56(2).2018.152205
- Views 187
- Downloads 0
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