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公开(公告)号：EP1956409A3
公开(公告)日：2012-01-04
申请号：EP08101257.7
申请日：2008-02-04
发明人： Cho, Hee-sung
CPC分类号： G02B26/123 , G02B13/0005
摘要： A light scanning unit includes a light source (10) which emits light beam with a predetermined wavelength, a beam deflector (30) which deflects and scans the light beam emitted by the light source (10) toward a photosensitive body (50), and an f-θ lens (40) which has at least one plastic lens and forms an image for the light deflected by the beam deflector (30) on the photosensitive body (50), the light scanning unit satisfying a following formula0 max - L min ≤ [20×(cos θ) 5 + 10] × λ/(5×10-4) where L max and L min respectively represent a maximum value and a minimum value of a total light passing distance from a light axis of at least one plastic lens according to a deflection angle, θ is an angle formed between a polarization direction of the light beam emitted by the light source (10) and a sub-scanning direction, and λ is a wavelength of the light beam emitted by the light source (10).
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公开(公告)号：EP1956409B1
公开(公告)日：2015-04-22
申请号：EP08101257.7
申请日：2008-02-04
发明人： Cho, Hee-sung
CPC分类号： G02B26/123 , G02B13/0005
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3.发明公开Light scanning unit and image forming apparatus employing the same 有权Lichtabtasteinheit und damit aufgebaute Bilderzeugungsvorrichtung
公开(公告)号：EP1956409A2
公开(公告)日：2008-08-13
申请号：EP08101257.7
申请日：2008-02-04
发明人： Cho, Hee-sung
CPC分类号： G02B26/123 , G02B13/0005
摘要： A light scanning unit includes a light source (10) which emits light beam with a predetermined wavelength, a beam deflector (30) which deflects and scans the light beam emitted by the light source (10) toward a photosensitive body (50), and an f-θ lens (40) which has at least one plastic lens and forms an image for the light deflected by the beam deflector (30) on the photosensitive body (50), the light scanning unit satisfying a following formula0 max - L min ≤ [20×(cos θ) 5 + 10] × λ/(5×10-4) where L max and L min respectively represent a maximum value and a minimum value of a total light passing distance from a light axis of at least one plastic lens according to a deflection angle, θ is an angle formed between a polarization direction of the light beam emitted by the light source (10) and a sub-scanning direction, and λ is a wavelength of the light beam emitted by the light source (10).
摘要翻译： 光扫描单元包括发射具有预定波长的光束的光源（10），将由光源（10）发射的光束偏转并扫描到光敏体（50）的光束偏转器（30），以及 具有至少一个塑料透镜并且由光束偏转器（30）在感光体（50）上偏转的光形成图像的f-R透镜（40），所述光扫描单元满足以下公式0
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