-
公开(公告)号：US06364487B1
公开(公告)日：2002-04-02
申请号：US09240198
申请日：1999-01-29
IPC分类号： G03B2126
CPC分类号： H04N5/74 , G03B21/2033 , G03B21/2073
摘要： An illumination source for use in projectors and the like. The illumination source includes a light source that generates a two-dimensional emission pattern having a light intensity that varies as a function of position in the emission pattern. A collector collects the light from the light source and illuminates an exit aperture therewith. The illuminated exit aperture has a two-dimensional emission pattern with a light intensity that varies as a function of position in a manner that is more uniform as a function of position than the emission pattern of the light source. An imaging optical element images the exit aperture onto a surface. The collector is preferably a compound parabolic concentrator or a compound elliptical concentrator. In one embodiment of the invention, a partially reflecting film is placed between the exit aperture and the imaging optical element. The partially reflecting film reflects light of a first polarization state back into the collector and transmits light of the orthogonal polarization state. In another embodiment of the invention, a quarter wave plate is introduced between the exit aperture and the partially reflecting film to further increase the radiance of the source.
摘要翻译： 用于投影仪等的照明源。 照明源包括产生具有作为发射图案中的位置的函数而变化的光强度的二维发射图案的光源。 收集器收集来自光源的光并照射出口孔。 照射的出射孔具有二维发射图案，其具有以与光源的发射图案相比作为位置的函数更均匀的方式作为位置的函数而变化的光强度。 成像光学元件将出射孔图像到表面上。 收集器优选为复合抛物面浓缩器或复合椭圆形浓缩器。 在本发明的一个实施例中，部分反射膜被放置在出射孔和成像光学元件之间。 部分反射膜将第一偏振态的光反射回集光体，透射正交偏振态的光。 在本发明的另一个实施例中，在出口孔和部分反射膜之间引入四分之一波片，以进一步增加源的辐射度。
-
公开(公告)号：US06325524B1
公开(公告)日：2001-12-04
申请号：US09239571
申请日：1999-01-29
IPC分类号： F21V1304
CPC分类号： G03B21/2033 , F21K9/68 , G03B21/2066 , G03B27/545 , H01L25/0753 , H01L33/60 , H01L2924/0002 , H01L2933/0091 , Y10S362/80 , H01L2924/00
摘要： A light source for generating light that is collected by an optical system that collects light leaving the light source within a predetermined acceptance angle relative to an axis defined in relation to the optical system. The light source includes a plurality of LEDs mounted on a reflecting base. Each of the LEDs generates light that leaves that LED via a top surface, a bottom surface, and one or more side surfaces of the LED. The reflecting base has a reflective surface in contact with the bottom surface of each of the LEDs. Light leaving the side surfaces of the LEDs is reflected into the acceptance angle of the optical system by a plurality of reflectors. In one embodiment of the invention, the reflectors include a plurality of reflecting facets for reflecting light leaving the side surfaces of the LEDs. The facets may be part of the reflective base or separate objects located between the LEDs. In another embodiment of the invention, the reflectors include scattering centers located between the LEDs.
摘要翻译： 一种用于产生由光学系统收集的光的光源，所述光学系统将离开所述光源的光相对于关于所述光学系统限定的轴收集在预定的接收角内。 光源包括安装在反射底座上的多个LED。 每个LED产生通过LED的顶表面，底表面和一个或多个侧表面离开该LED的光。 反射底座具有与每个LED的底表面接触的反射表面。 离开LED的侧表面的光被多个反射器反射到光学系统的接受角度。 在本发明的一个实施例中，反射器包括用于反射离开LED的侧表面的光的多个反射面。 小面可以是位于LED之间的反射基底或分开的物体的一部分。 在本发明的另一个实施例中，反射器包括位于LED之间的散射中心。
-
公开(公告)号：US07338216B2
公开(公告)日：2008-03-04
申请号：US10814327
申请日：2004-03-31
CPC分类号： H05K1/0218 , H05K1/0231 , H05K1/0393 , H05K1/147 , H05K2201/0715 , H05K2201/10121
摘要： A transmitter subassembly ground return path comprises a coupling member having a plurality of layers. At least one of the layers includes a signal trace layer that has one or more signal traces coupling components of a transceiver substrate to components of the transmitter subassembly. At least one of the one or more signal traces can be coupled to a signal coupling capacitor. At least one of the ground plane layers can connect the body of the transmitter subassembly to one or more common mode grounding capacitors. The ground plane layers of the coupling member also shield at least some of the electromagnetic radiation that can emanate from the signal trace layer in high frequency data transmissions.
摘要翻译： 发射器子组件接地返回路径包括具有多个层的耦合构件。 层中的至少一个包括具有将收发器基板的部件耦合到发射器子组件的组件的一个或多个信号迹线的信号迹线层。 一个或多个信号迹线中的至少一个可以耦合到信号耦合电容器。 至少一个接地层可以将发射器子组件的主体连接到一个或多个共模接地电容器。 耦合构件的接地平面层还屏蔽在高频数据传输中可能从信号迹线层发出的至少一些电磁辐射。
-
公开(公告)号：US07515620B2
公开(公告)日：2009-04-07
申请号：US10426472
申请日：2003-04-29
IPC分类号： H01S3/00
CPC分类号： H01S5/06213 , H01S5/06812 , H01S5/4025
摘要： A method for optimizing a dc operating drive current of a laser diode is presented. Lasers of a particular type are characterized in terms of the dependency of certain parameters on temperature and of the minimum bias current required for adequate laser speed. The minimum bias current is determined using the operating bias current minus the threshold current all normalized by the threshold current. For individual laser diodes, the threshold current and slope efficiency are obtained at various temperatures to allow calculation at operating temperatures of interest. The minimum laser bias current for speed can then be determined over the operating temperature range. This may be done by setting the optical power to the highest value calculated using this minimum acceptable bias criterion over the operating temperature range. The ac and dc laser driver current sourcing requirements may be computed to ensure laser and module compatibility.
摘要翻译： 提出了一种用于优化激光二极管的直流工作驱动电流的方法。 特定类型的激光器的特征在于某些参数对温度和足够的激光速度所需的最小偏置电流的依赖性。 使用工作偏置电流减去所有由阈值电流归一化的阈值电流来确定最小偏置电流。 对于单独的激光二极管，可以在各种温度下获得阈值电流和斜率效率，以便在感兴趣的工作温度下进行计算。 然后可以在工作温度范围内确定用于速度的最小激光偏置电流。 这可以通过将光功率设置为在工作温度范围内使用该最小可接受偏置标准计算的最高值来完成。 可以计算交流和直流激光驱动器电流源的要求，以确保激光和模块的兼容性。
-
公开(公告)号：US06682207B2
公开(公告)日：2004-01-27
申请号：US09887954
申请日：2001-06-22
申请人： Andreas G. Weber , Gregory M. Cutler , William R. Trutna, Jr. , Gerd O. Muller , Regina B. Muller-Mach
发明人： Andreas G. Weber , Gregory M. Cutler , William R. Trutna, Jr. , Gerd O. Muller , Regina B. Muller-Mach
IPC分类号： F21V900
CPC分类号： H01S5/423 , H01L25/0753 , H01L33/50 , H01L2924/0002 , H01S5/4025 , H01S5/4087 , H01L2924/00
摘要： A light emitting device comprises a light emitting diode that emits primary light and a SrGa2S4:Eu2+ phosphor material capable of absorbing at least a portion of the primary light and emitting secondary light. The secondary light includes a wavelength longer than a wavelength of the primary light.
摘要翻译： 发光器件包括发射一次光的发光二极管和能够吸收至少一部分初级光并发射次级光的SrGa2S4：Eu 2+荧光体材料。 次级光包括比初级光的波长长的波长。
-
公开(公告)号：US06273589B1
公开(公告)日：2001-08-14
申请号：US09239572
申请日：1999-01-29
IPC分类号： F21V900
CPC分类号： H01S5/423 , H01L25/0753 , H01L33/50 , H01L2924/0002 , H01S5/4025 , H01S5/4087 , H01L2924/00
摘要： A light source having emissions in a plurality of spectral bands. The simplest light source according to the present invention is constructed from first and second light sources and a dichroic beam splitter. The first and second solid state light sources emit light in first and second bands of non or only partially-overlapping wavelengths. The dichroic beam splitter combines light from the first and second solid state light sources by passing light in the first band while reflecting light in the second band to generate light having a spectral content in the first and second bands. The solid state light sources are preferably arrays of LEDs, VCSELs, or edge emitting semiconductor lasers. A light source having improved radiance in the green region of the spectrum can be constructed by utilizing first and second solid state light sources that emit in different bands in the green portion of the spectrum. A white light source can be constructed by utilizing a third solid state light source and a second dichroic beam splitter and by choosing the emission bands of the light sources such that light leaving the second dichroic beam splitter is perceived as white by an observer when all three solid state light sources are emitting light. This light source has a radiance that is higher than the radiance of each individual solid state light source.
摘要翻译： 具有多个光谱带中的发射的光源。 根据本发明的最简单的光源由第一和第二光源和二向色分束器构成。 第一和第二固态光源在非或仅部分重叠的波长的第一和第二波段中发光。 二向色分束器通过使第一频带中的光通过，同时反射第二频带中的光而组合来自第一和第二固态光源的光，以产生具有第一和第二频带中的频谱含量的光。 固态光源优选地是LED，VCSEL或边缘发射半导体激光器的阵列。 可以通过利用在光谱的绿色部分中以不同频带发射的第一和第二固态光源来构造具有在光谱的绿色区域中具有改善的辐射度的光源。 可以通过利用第三固态光源和第二二向色分束器来构造白光源，并且通过选择光源的发射带使得离开第二二向色分束器的光被观察者视为白色，当三个 固态光源正在发光。 该光源的辐射度高于每个固体光源的辐射度。
-
公开(公告)号：US06212213B1
公开(公告)日：2001-04-03
申请号：US09240284
申请日：1999-01-29
IPC分类号： H01S319
CPC分类号： G03B21/2033 , G03B21/204 , G03B27/545 , H04N9/3108 , H04N9/315
摘要： A light source constructed from a two dimensional array of light emitting devices. The light emitting devices include first, second and third types of light emitter. The first type of light emitting device covers a first area in the two dimensional array and emits light in a first region of the optical spectrum. The second type of light emitting device covers a second area in the two dimensional array and emits light in a second region of the optical spectrum, and the third type of light emitting device covers a third area in the two dimensional array and emits light in a third region of the optical spectrum. The first, second, and third areas are chosen such that the simultaneous output from all emitters generates white light. At least one of the emitter types covers an area larger than that covered by the others. In the preferred embodiment of the present invention, the first type of light emitting device includes a light emitting device that emits light at a wavelength less than the wavelength of a green region of the optical spectrum; a color conversion compound absorbs this light and re-emits it in the green region of the optical spectrum.
摘要翻译： 由二维发光器件阵列构成的光源。 发光器件包括第一，第二和第三类型的发光器。 第一类型的发光器件覆盖二维阵列中的第一区域并且在光谱的第一区域中发光。 第二类型的发光器件覆盖二维阵列中的第二区域并且在光谱的第二区域中发光，并且第三类型的发光器件覆盖二维阵列中的第三区域并发射光 光谱的第三区域。 选择第一，第二和第三区域使得来自所有发射器的同时输出产生白光。 发射器类型中的至少一种覆盖的面积大于其他发射器类型的面积。 在本发明的优选实施例中，第一类型的发光器件包括发射波长小于光谱的绿色区域的波长的光的发光器件; 颜色转换化合物吸收该光并将其再次发射在光谱的绿色区域中。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.013 秒)
