专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明授权

US4789977A Optical data recording device 失效
标题翻译：光学数据记录装置
公开(公告)号：US4789977A
公开(公告)日：1988-12-06
申请号：US927924
申请日：1986-11-06
申请人： Adrianus H. Oudenhuysen , Wai-Hon Lee
发明人： Adrianus H. Oudenhuysen , Wai-Hon Lee
IPC分类号： G11B7/135 , G02B5/32
CPC分类号： G11B7/1353
摘要： An optical data recording device for focusing a laser beam on a recording medium for storing and reading out information therefrom. The device is characterized by using a high efficiency holographic grating as a polarization beam splitter. In a forward collimated light path the holographic grating diffracts a light beam from a laser on an objective lens. The beam is reflected from the surface towards the recording medium and transmitted through the grating onto a light detector. The grating further provides for correcting a typical elliptical light beam shape from the laser to a circular beam shape as well as for correcting the astigmatism typically found in the wave fronts emitting from a laser diode.

42. 发明授权

US4731772A Optical head using hologram lens for both beam splitting and focus error detection functions 失效
标题翻译：光头使用全息透镜进行分光和聚焦误差检测功能
公开(公告)号：US4731772A
公开(公告)日：1988-03-15
申请号：US860154
申请日：1986-05-06
申请人： Wai-Hon Lee
发明人： Wai-Hon Lee
IPC分类号： G11B7/09 , G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B7/1353 , G11B11/10532 , G11B7/123
摘要： An improved optical head which eliminates the need for a biprism or cylindrical lens for focus detection and allows the placement of a photodetector immediately adjacent to the semiconductor laser to reduce alignment problems and vibrational errors. A semiconductor laser is provided which produces a laser beam which impinges upon a movable objective lens. The objective lens focuses the laser beam onto an information medium. A diffraction grating, which may be holographic, is placed between the laser and the objective lens. The diffracted beams on the forward path from the laser to the objective lens are not used, but on the return path, one of the diffracted beams is focused onto a photodetector which is in the same plane as the semiconductor laser.
摘要翻译：一种改进的光学头，其不需要用于焦点检测的双棱镜或柱面透镜，并且允许将光电检测器放置在紧邻半导体激光器的位置以减少对准问题和振动误差。提供半导体激光器，其产生撞击可移动物镜的激光束。物镜将激光束聚焦到信息介质上。可以是全息的衍射光栅放置在激光和物镜之间。不使用从激光器到物镜的前向路径上的衍射光束，但是在返回路径上，衍射光束之一被聚焦到与半导体激光器处于同一平面中的光电检测器。

43. 发明授权

US4106844A Laser scanning system utilizing computer generated holograms 失效
标题翻译：激光扫描系统利用计算机生成的全息图
公开(公告)号：US4106844A
公开(公告)日：1978-08-15
申请号：US772603
申请日：1977-02-28
申请人： Olof Bryngdahl , Wai-Hon Lee
发明人： Olof Bryngdahl , Wai-Hon Lee
IPC分类号： H04N3/02 , G02B26/10 , G03H1/00 , G03H1/08 , G02B27/17
CPC分类号： G03H1/08 , G02B26/106 , G03H1/0005
摘要： A laser scanning system wherein the scanning line is produced by interposing a computer generated hologram and lens between an illuminating laser beam and the plane of the scan line. Three types of scan patterns (one, two and three dimensional), continuous as well as discontinuous, can be realized by utilizing the principles of the invention.
摘要翻译：一种激光扫描系统，其中扫描线通过在计算机产生的全息图和透镜之间插入照明激光束和扫描线的平面而产生。可以通过利用本发明的原理实现三种类型的扫描图案（一个，两个和三维），连续的和不连续的。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式