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公开(公告)号：US09335524B2
公开(公告)日：2016-05-10
申请号：US14311516
申请日：2014-06-23
申请人： Young Optics Inc.
发明人： Yi-Hsueh Chen , Hsin-Hung Lin , Chun-Tung Wu , Kun-Yao Chen
摘要： A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group.
摘要翻译： 提供一种具有光阀的投影装置的投影透镜。 光阀提供图像光束。 投影透镜包括第一透镜组，第二透镜组和反射透镜组。 第二透镜组设置在第一透镜组和反射透镜组之间。 第一透镜组具有正屈光力。 第二透镜组具有正折光力并且包括位于透镜之间的多个透镜和孔径光阑。 第二透镜组的视野角小于100度。 反射透镜具有负反射能力并且具有弯曲的反射表面以反射通过第二透镜组的图像光束。
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公开(公告)号：US11426993B2
公开(公告)日：2022-08-30
申请号：US15249966
申请日：2016-08-29
申请人： Young Optics Inc.
发明人： Chao-Shun Chen , Kun-Yao Chen , Chien-Hsing Tsai
IPC分类号： B29C64/129 , B29C64/286 , B33Y30/00
摘要： A three-dimensional printing system includes a build device and an optical projection engine. The build device includes a curing tank, a photocurable material and a build platform, and the photocurable material and the build platform is disposed in the curing tank. The optical projection engine has a zoom lens for projecting image beams with at least a first pixel size and a second pixel size on the build platform to cure the photocurable material, and the first pixel size is different to the second pixel size.
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