Optical transfer functions of the three types of variable-spacing diffraction gratings for use with a monochromator.

Details Optical transfer functions of the three types of variable-spacing diffraction gratings for use with a monochromator. Optical transfer functions of the three types of variable-spacing diffraction gratings for use with a monochromator.

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jmo....36...67t&link_type=abstract

Journal of Modern Optics, Vol. 36, No. 1, p. 67 - 78

Physics

Optics

Gratings

Scientific paper

The diffraction-based and geometrical optics-based optical transfer functions (DOTF and GOTF) are calculated for three types of variable-spacing diffraction gratings. The three types are: 1. a conventional grating, 2. a holographically produced grating and 3. a mechanically ruled variable-spacing grating. They are mounted on a Seya-Namioka monochromator. The DOTF is obtained in terms of the autocorrelation integral of the pupil function, and the GOTF is given as the Fourier transform of the spot diagram of the spectral line image. The performance of these gratings is evaluated by spot diagrams, geometrical line profiles and the OTFs. The coma-corrected, mechanically ruled, variable-spacing grating provides better response and higher resolution than the other two types of grating.

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