30 November 2009 CCD based digital optical transfer function testing instrument
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As the development of image processing and area array detectors, CCD has been used widely in optical transfer function (OTF) measurement for it can realize fast measurement and avoid scanning operation. An OTF testing instrument using CCD camera is introduced in this paper. This instrument works in visible wavelength with 200mm entrance pupil diameter. The highest spatial frequency this instrument can measure is up to 200lp/mm. This instrument is composed of four parts, that is, object generator, image analyzer, control system and software. A 50mm plano-convex lens is used to calibrate this OTF testing instrument. According to the calibration results, measurement error of this testing instrument is less than 0.04, while its repeatability is less than 0.03.
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Xinhua Chen, Xinhua Chen, Yuheng Chen, Yuheng Chen, Liangjun Zhang, Liangjun Zhang, Weimin Shen, Weimin Shen, } "CCD based digital optical transfer function testing instrument", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 75062J (30 November 2009); doi: 10.1117/12.837889; https://doi.org/10.1117/12.837889

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