专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3977766A Projection screen and apparatus for the fabrication thereof 失效
标题翻译：投影屏幕及其制造装置
公开(公告)号：US3977766A
公开(公告)日：1976-08-31
申请号：US571124
申请日：1975-04-24
申请人： Harold F. Langworthy , Robert N. Wolfe
发明人： Harold F. Langworthy , Robert N. Wolfe
IPC分类号： G03B21/56 , G03B21/60 , B21D3/06
CPC分类号： G03B21/602 , Y10T83/0304 , Y10T83/178 , Y10T83/7145
摘要： A projection screen of improved aesthetic quality. The screen comprises a plurality of rectilinear rows of precisely contoured optical microelements each adapted to redistribute substantially all of the incident image flux through a predefined audience angle with uniform luminance. The microelements are formed in a surface of a work piece by applying an electrical signal of predefined waveform but of random frequency to the input of the cutting stylus of a sound recording head which moves relative to the work piece in a series of parallel traverses. The electrical signal is recorded on a memory element which moves with the work piece past a stationary pickup head as each row is cut. Because the same signal from the memory element is used to cut each row, an identical phase relationship is maintained between the microelements in adjacent rows.
摘要翻译：具有改善美学质量的投影屏幕。屏幕包括多个直线行精确轮廓的光学微元件，每一行适于基本上将所有入射的图像通量重新分布在具有均匀亮度的预定的观众角度。微量元件通过将预定波形的电信号以随机频率施加到以一系列平行的移动相对于工件移动的声音记录头的切割笔的输入端而形成在工件的表面中。电信号被记录在随着每一行被切割而随着工件移动通过固定拾取头的存储元件上。因为来自存储元件的相同信号用于切割每行，所以在相邻行中的微元件之间保持相同的相位关系。

2. 发明授权

US4901252A Method for producing planar geometric projection images 失效
标题翻译：平面几何投影图像的制作方法
公开(公告)号：US4901252A
公开(公告)日：1990-02-13
申请号：US100686
申请日：1987-09-24
申请人： William J. Fitzgerald , Franklin Gracer , Robert N. Wolfe
发明人： William J. Fitzgerald , Franklin Gracer , Robert N. Wolfe
IPC分类号： G06T15/40
CPC分类号： G06T15/40
摘要： The lines representing each edge of each face of each object of a model for producing a multiple object image are segmented at line of sight intersections with other lines representing contour edges of visible faces. Each resulting edge line segment is checked against all visible faces to determine which are visible and which are invisible, and information on visibility is stored together with detailed information on each edge line segment for each object. The model is modified by changing the number of component objects and after each change checking the edge line segments for visibility only with respect to the changes associated with the changed component objects. This results in a substantial reduction in the required number of comparisons between segments and faces as compared to prior methods.
摘要翻译：表示用于产生多个物体图像的模型的每个物体的每个面的每个边缘的每条边线的线在与可见面的轮廓边缘的其它线的视线相交线处被分割。针对所有可见面检查每个产生的边缘线段，以确定哪些是可见的，哪些是不可见的，并且关于可见性的信息与每个对象的每个边缘线段上的详细信息一起存储。通过更改组件对象的数量并在每次更改之后，根据与更改的组件对象相关联的更改来检查边缘线段以便可见性来修改模型。与以前的方法相比，这导致了段和面之间所需的比较数量的显着减少。

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