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    • 6. 发明申请
    • Beam Shaping Optical System And Optical System Of Laser Beam Printer
    • 激光束打印机光束成像光学系统和光学系统
    • US20070285781A1
    • 2007-12-13
    • US11579043
    • 2005-04-28
    • Daisuke SekiKouei Hatade
    • Daisuke SekiKouei Hatade
    • G02B27/09
    • B41J2/471G02B19/0014G02B19/0052G02B27/0944
    • There is provided an axially asymmetric beam shaping optical system causing no astigmatism for variation in refractive index incident to an external cause, e.g. variation in wavelength of a light source or variation in ambient temperature. The system has a diffraction grating plane as follows. Assuming the optical axis is the z-axis and a plane perpendicular to the optical axis is the xy plane, the phase function in the x-axis direction and the y-axis direction of the diffraction grating plane is determined to minimize astigmatism by equalizing variation in distance from the light source to an image forming point or a virtual image point on the xz plane and variation in that distance on the yz plane. Furthermore, the system has a diffraction grating plane as follows. The phase function in the x-axis direction and the y-axis direction of the diffraction grating plane is determined to minimize astigmatism by equalizing variation in distance from the light source to the image forming point or the virtual image point on the xz plane and variation in that distance on the yz plane for temperature variation.
    • 提供了一种轴向不对称的光束整形光学系统,其不会引起入射到外部原因的折射率变化的散光,例如, 光源的波长变化或环境温度的变化。 该系统具有如下的衍射光栅平面。 假设光轴是z轴,垂直于光轴的平面是xy平面,则确定衍射光栅平面的x轴方向和y轴方向的相位函数,以通过均衡变化使散光最小化 距离光源到xz平面上的图像形成点或虚拟图像点的距离以及yz平面上该距离的变化。 此外,该系统具有如下的衍射光栅平面。 确定衍射光栅平面的x轴方向和y轴方向的相位函数,以通过均衡从光源到图像形成点或xz平面上的虚拟图像点的距离的变化以及变化而使像散最小化 在yz平面上的距离用于温度变化。