16 August 2010 Beam shaping optical system and optical system of laser printer
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We report on an axially asymmetric beam shaping optical system including a diffraction grating. This optical system compensates the astigmatism introduced by change in wavelength of a light source or change in ambient temperature. The phase function of the diffraction grating is determined to minimize the astigmatism by equalizing variation in distance from a light source to an image point on xz plane and variation in that distance on yz plane. This beam shaping optical system relates to a laser printer having an axially asymmetric profile.
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Michihisa Onishi, John Rauseo, Daisuke Seki, Kouei Hatade, "Beam shaping optical system and optical system of laser printer", Proc. SPIE 7789, Laser Beam Shaping XI, 77890K (16 August 2010); doi: 10.1117/12.863010; https://doi.org/10.1117/12.863010

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