The influence of scattering light on optical systems’ quality characteristics

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Леонов М.Б., Шульга А.А. Влияние рассеянного излучения на характеристики качества оптических систем // Оптический журнал. 2023. Т. 90. № 7. С. 68–75. http://doi.org/10.17586/1023-5086-2023-90-07-68-75

Leonov M.B., Shul'ga A.A. The influence of scattering light on optical systems’ quality characteristics [in Russian] // Opticheskii Zhurnal. 2023. V. 90. № 7. P. 68–75. http://doi.org/10.17586/1023-5086-2023-90-07-68-75

For citation (Journal of Optical Technology):

Mikhail B. Leonov and Anna A. Shul’ga, "Influence of scattering light on optical systems’ quality characteristics," Journal of Optical Technology. 90(7), 395-398 (2023). https://doi.org/10.1364/JOT.90.000395

Abstract:

Subject of study. The correlation of the modulation transfer function related to optical systems quality and the veiling glare index related to optical systems scattering light quantity was researched. Aim of study is determination of correlation between the modulation transfer function and the veiling glare index to derive lowness of the modulation transfer function via the veiling glare index and vice versa, that allow optical system developers set tolerance to the veiling glare index via the modulation transfer function decrease. Method. Theoretical computation method of the modulation transfer function decrease via the veiling glare index. Practical method of the veiling glare index computation using measurement result of the modulation transfer function acquired by Fourier transform of the line spread function. Main results. Standards documentation and research regarding to scattering light in optical system was analyzed. The veiling glare index and glare spread function are one of measureable characteristics of scattering light in optical systems. Theoretical and practical research were made, which finally could help to derive formulas of optical systems the modulation transfer function decrease via the veiling glare index and vice versa. To proof validity of formulas the veiling glare index was calculated using the modulation transfer function decrease by Fourier transform of the line spread function for lens with high the veiling glare index and lens with low the veiling glare index. Lenses were tested on collimator test bench according to standard the modulation transfer function test method. The veiling glare index calculation results via the modulation transfer function measurements proofed validity of formulas. Recommendations for optical systems the veiling glare index measurement without a photometric sphere via the modulation transfer function with the lack of spherical aberrations were given. Practical significance. Acquired results allowing optical system developers set tolerance to the veiling glare index via the modulation transfer function decrease. Results can be used as background for new the veiling glare index measurement method without a photometric sphere via the modulation transfer function with the lack of spherical aberrations.

Keywords:

photometric measurements, scattering light, veiling glare index, optical measurements, line spread function, modulation transfer function

OCIS codes: 120.4630,120.4800, 120.5240, 110.4850

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