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- W2022387743 abstract "A novel means of focal length measurement is proposed based upon Hartmann–Shack principle of wavefront detection. Mathematical approaches of focal length measurement are deduced without the necessity of knowing the position of lens principle plane. In experiment, laser sources with wavelength of 633 nm and 780 nm are separately used and focal length of three pieces of doublets is measured under two wavelengths mentioned above. As were shown by the results, this method of focal length measurement could not only accurately measure lens focal length, but also evaluate chromatic aberration of them. Since the intensity of light is detected by CCD, optical characteristics of lens beyond the range of visible light are also measurable when response range of CCD allows. This new means of focal length measurement is characterized by high accuracy, fast measuring and easy to setup, thereby, it is applicable in wide fields of area." @default.
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- W2022387743 date "2012-03-01" @default.
- W2022387743 modified "2023-10-17" @default.
- W2022387743 title "Focal length measurement based on Hartmann–Shack principle" @default.
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- W2022387743 doi "https://doi.org/10.1016/j.ijleo.2011.05.011" @default.
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