Optical scanning apparatus
    1.
    发明公开
    Optical scanning apparatus 失效
    光学扫描仪

    公开(公告)号:EP0286066A3

    公开(公告)日:1990-12-05

    申请号:EP88105474.6

    申请日:1988-04-06

    IPC分类号: G02B27/00 G02B26/10

    摘要: In an optical scanning apparatus, a scanning lens (1) is composed of three lens elements. The centrally located lens element of the scanning lens (1) has a refractive power in the direction (y) for correcting the surface tilt, that is an inverted number of a focal length that is changed in accordance with the scanning view angle, whereby curvature of field is well corrected and RMS spot diameters on the scanning surface (17) may be small. In addition, even if the view angle is increased, imaging characteristics may be kept at a high resolving power.

    Light-beam scanning apparatus
    4.
    发明公开
    Light-beam scanning apparatus 失效
    光束扫描装置

    公开(公告)号:EP0120240A2

    公开(公告)日:1984-10-03

    申请号:EP84101223.0

    申请日:1984-02-07

    IPC分类号: G02B1/10

    CPC分类号: G02B5/09

    摘要: A light-beam scanning apparatus is disclosed in which a mirror surface of a metal having a characteristic that the reflectance of the mirror surface increases as the incident angle of light incident on the mirror surface is larger, is used as a reflecting surface (4), the optical thickness nd of a transparent protective film (5) formed on the reflecting surface is made substantially equal to mλ/2 (where n, d, m, and λ indicate the refractive index ofthe protective film, the thickness of the protective film, an integer, and the wavelength of the incident light, respectively), the incident light is linearly-polarized light, and the direction of vibration of the linearly-polarized light is inclined atan angle of about +45°to -45°to a direction perpendicular to the plane of incidence of the linearly-polarized light.

    摘要翻译: 公开了一种光束扫描装置,其中具有随着入射在镜面上的光的入射角度更大而使镜面的反射率增加的特性的金属的镜面被用作反射面(4) ,使在反射面上形成的透明保护膜(5)的光学厚度nd基本上等于mλ/ 2(其中n,d,m和λ表示保护膜的折射率,保护膜的厚度 ,整数和入射光的波长),入射光是线性偏振光,并且线性偏振光的振动方向相对于光轴倾斜大约+ 45°到-45°的角度 垂直于线偏振光的入射面的方向。

    Light-beam scanning apparatus
    6.
    发明公开
    Light-beam scanning apparatus 失效
    光束扫描装置

    公开(公告)号:EP0120240A3

    公开(公告)日:1985-10-30

    申请号:EP84101223

    申请日:1984-02-07

    IPC分类号: G02B01/10

    CPC分类号: G02B5/09

    摘要: A light-beam scanning apparatus is disclosed in which a mirror surface of a metal having a characteristic that the reflectance of the mirror surface increases as the incident angle of light incident on the mirror surface is larger, is used as a reflecting surface (4), the optical thickness nd of a transparent protective film (5) formed on the reflecting surface is made substantially equal to mλ/2 (where n, d, m, and λ indicate the refractive index ofthe protective film, the thickness of the protective film, an integer, and the wavelength of the incident light, respectively), the incident light is linearly-polarized light, and the direction of vibration of the linearly-polarized light is inclined atan angle of about +45°to -45°to a direction perpendicular to the plane of incidence of the linearly-polarized light.