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    • 7. 发明申请
    • Fresnel lens combination
    • 菲涅尔透镜组合
    • US20070153402A1
    • 2007-07-05
    • US11322981
    • 2005-12-30
    • Patrick Destain
    • Patrick Destain
    • G02B3/08
    • G02B3/08G03B21/208
    • A focusing unit includes a Fresnel lens combination, where the Fresnel lenses are oriented to reduce shadowing losses. Shadowing is a scattering of light from reflection at the facet walls that separate adjacent Fresnel zones on a given Fresnel lens. Two substantially adjacent Fresnel lenses make up the focusing unit, which can be used as a condenser that collects light from a source in a projection system. Both Fresnel lenses have non-faceted sides that face the light source. The first Fresnel lens collimates the light from the source. The second Fresnel lens receives the collimated beam, with a range of incident angles determined by the spatial extent of the source. Components such as reflective polarizers and anti-reflection coatings can be used between the Fresnel lenses and can be applied to the non-faceted side of the second Fresnel lens.
    • 聚焦单元包括菲涅尔透镜组合,其中菲涅耳透镜被定向以减少遮蔽损失。 阴影是在分形壁处的反射的光的散射,其分隔给定菲涅尔透镜上的相邻菲涅耳带。 两个基本上相邻的菲涅尔透镜构成聚焦单元,其可以用作在投影系统中从源收集光的冷凝器。 菲涅耳透镜都具有面向光源的非面侧。 第一个菲涅尔透镜准直来自光源的光。 第二菲涅尔透镜接收准直光束,其中入射角的范围由光源的空间范围确定。 可以在菲涅尔透镜之间使用诸如反射偏振器和抗反射涂层的组件,并且可以将其应用于第二菲涅尔透镜的非平面侧。
    • 10. 发明申请
    • Projection system with beam homogenizer
    • 光束均化器投影系统
    • US20070153397A1
    • 2007-07-05
    • US11322958
    • 2005-12-30
    • Patrick Destain
    • Patrick Destain
    • G02B3/00
    • G02B19/0066G02B19/0014
    • A projection system having a prescribed relationship between the condenser and the projection lens is disclosed, where an imager gate normally coinciding with a projection object plane is between and spaced away from a condenser back focal plane and a condenser image plane. The condenser images an extended source onto the condenser image plane. A pixilated panel or film defining a graphic image is located at the imager gate. The magnification of the condenser is chosen so the image of the source is essentially the same size as the pixilated panel. Positioning the imager gate away from the condenser image plane provides blurring of any brightness non-uniformities across the area of the source, providing a relatively uniform illumination pattern whose outer shape matches the shape of the imager gate.
    • 公开了一种具有与电容器和投影透镜之间的规定关系的投影系统,其中通常与投影物平面重合的成像器栅极位于并与间隔开的聚光镜后焦平面和聚光镜图像平面之间。 聚光器将扩展源图像到聚光镜图像平面上。 定影图形图像的像素化面板或胶片位于成像器门。 选择冷凝器的放大率,使得源的图像与像素化面板基本上相同。 将成像器门定位成离开聚光镜图像平面,在源的区域上提供任何亮度不均匀性的模糊,从而提供相对均匀的照明图案,其外形与成像器门的形状相匹配。