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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
CPC分类号： B41J2/471 , G02B26/10 , G02B27/0031
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.
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公开(公告)号：EP0286066B1
公开(公告)日：1994-08-31
申请号：EP88105474.6
申请日：1988-04-06
CPC分类号： B41J2/471 , G02B26/10 , G02B27/0031
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公开(公告)号：EP0286066A2
公开(公告)日：1988-10-12
申请号：EP88105474.6
申请日：1988-04-06
CPC分类号： B41J2/471 , G02B26/10 , G02B27/0031
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.
摘要翻译： 在光学扫描装置中，扫描透镜（1）由三个透镜元件构成。 扫描透镜（1）的中心位置的透镜元件具有用于校正表面倾斜的方向（y）的折射力，即根据扫描视角改变的焦距的反转数，由此曲率 的场被良好校正，并且扫描表面（17）上的RMS光点直径可能很小。 此外，即使视角增加，也可以将成像特性保持在高分辨能力。
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