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公开(公告)号：US06827450B1
公开(公告)日：2004-12-07
申请号：US10262539
申请日：2002-10-01
IPC分类号： G03B2100
CPC分类号： H04N9/3117 , G02B5/201 , G02B5/3058 , G02B26/10 , G02B27/286 , G02F1/13362
摘要： A integrating light pipe re-circulates color to improve efficiency. A number of color filters, such as blue, green, and red filters, on the end of the light pipe transmit a selected color and reflect the remaining light back into the light pipe, where it is spatially homogenized and re-circulated back to the output of the light pipe. The re-circulated homogenized light illuminates the filters, and the process repeats. Thus, most of the light from the light source eventually is transmitted through one of the color filters. The filters can provide straight boundaries between the resultant color beams, which are provided to a scrolling element, such as a rotating prism, rotating mirror drum, or linear oscillating optical element, and hence to a light valve. The combination of the re-circulating light pipe and scrolling element provide continuous color scrolling and efficient use of the broad-spectrum light from the light source.
摘要翻译： 集成光管重新循环颜色以提高效率。 在光管末端上的多个滤色器（例如蓝色，绿色和红色滤色器）传输选定的颜色并将剩余的光反射回光管中，在那里空间上均匀化并再循环回到 输出光管。 重新循环均匀的光照射过滤器，重复该过程。 因此，来自光源的大部分光最终通过一个滤色器透射。 滤波器可以在所得到的彩色光束之间提供直线边界，其被提供给诸如旋转棱镜，旋转镜鼓或线性振荡光学元件的滚动元件，并且因此提供给光阀。 再循环光管和滚动元件的组合提供了连续的彩色滚动和有效利用来自光源的广谱光。
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公开(公告)号：US11269123B2
公开(公告)日：2022-03-08
申请号：US16260903
申请日：2019-01-29
摘要： Hollow optical elements that derive optical power from compound-curved reflective surfaces to produce a desired composite optical power. The reflective surfaces in combination with polarization control, can produce a triple-pass arrangement that determines the optical power. Two functional films, one or both of which are formed (e.g., thermoformed), can be joined at the perimeter to form units that are mechanically robust and therefore preserve optical performance under mechanical load. The air-spaced cavity formed between the two layers is free of birefringence concerns, where polarization control is crucial to contrast. These optical elements can be installed in frames or headsets to form lightweight wearable magnifiers, wide-angle collimators, tele-photo lenses, or for any application requiring optical power. They may be most appropriate for applications where light efficiency is not critical, such as well-lit environments, where the insertion-loss of 1 to 2 stops is not problematic.
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公开(公告)号：US10895675B2
公开(公告)日：2021-01-19
申请号：US15952336
申请日：2018-04-13
摘要： Optical filters that enhance image quality by exploiting differences in the wavelength dependence of the spectral power distribution (SPD) and the degree of polarization between elements in a scene in order to preserve, and more preferably enhance, color-contrast between one or more salient objects in the scene and/or a salient object and a background. The higher degree of polarization may be associated with the background or the one or more salient objects. Color contrast is associated with one or more of a difference in saturation, a difference in hue, and a difference in lightness.
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公开(公告)号：US20180259692A1
公开(公告)日：2018-09-13
申请号：US15916115
申请日：2018-03-08
CPC分类号： G02B5/205 , G02B5/3041 , G02B27/281 , H04N5/2254
摘要： A three (or more) polarizer arrangement is used to demonstrate a wide-angle variable-neutral-density (VND) filter that has both contrast uniformity and color uniformity. According to one embodiment, the outer polarizers effectively counter-rotate with respect to a fixed center polarizer as a means of compensating for transmission non-uniformity associated with geometrical polarization distortions experienced by off-normal rays. In particular, the achromatic compensation arrangement enables angle uniformity relative to normal-incidence transmission when the number of stops of attenuation grows large (e.g. 10-stops, or OD3). The filters are useful for cameras or instrumentation allowing mechanical or electromechanical tuning.
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公开(公告)号：US20100165306A1
公开(公告)日：2010-07-01
申请号：US12650643
申请日：2009-12-31
CPC分类号： G03B21/2026 , G02B19/0028 , G02B19/0047 , G03B21/208
摘要： Throughput efficiency of an optical system is enhanced by using a directional light source coupled to a non-imaging optical element matched to a size and acceptance angle of an imaging lens. In various embodiments, a beam projection system and accompanying method are described that include a lamp body formed from a dielectric material. A bulb, placed adjacent to the lamp body, has a fill that forms a plasma when RF power is coupled to the fill from the lamp body. An optical train is optically coupled to the bulb to transform light generated by the plasma. The optical train includes a non-imaging optical element, an aperture, and at least one imaging lens element.
摘要翻译： 通过使用耦合到与成像透镜的尺寸和接受角相匹配的非成像光学元件的定向光源来增强光学系统的吞吐效率。 在各种实施例中，描述了包括由电介质材料形成的灯体的光束投影系统和伴随方法。 放置在灯体附近的灯泡具有填充物，当RF功率与灯体耦合到填充物时形成等离子体。 光学系列光学耦合到灯泡以转换由等离子体产生的光。 光学系列包括非成像光学元件，孔径和至少一个成像透镜元件。
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公开(公告)号：US20090009087A1
公开(公告)日：2009-01-08
申请号：US11553856
申请日：2006-10-27
申请人： Frederick M. Espiau , Marc DeVincentis , Yian Chang , Frederick M. Espiau , Anthony D. McGettigan
发明人： Frederick M. Espiau , Marc DeVincentis , Yian Chang , Frederick M. Espiau , Anthony D. McGettigan
CPC分类号： H01J65/044 , Y02B20/22
摘要： A plasma lamp for an electrodeless plasma lamp having a waveguide body. The non-radiative thermal losses from the bulb are controlled to prevent the bulb from melting while providing a high level of radiation from the bulb. The thermal conductivity of the waveguide, configuration of the heat sink and size and placement of the bulb may be selected to provide a brightness of more than 80 lumens per watt and a total brightness of more than 12,000 lumens at a power level of 150 watts.
摘要翻译： 一种具有波导体的无电极等离子体灯的等离子体灯。 控制来自灯泡的非辐射热损失以防止灯泡熔化，同时提供来自灯泡的高水平辐射。 可以选择波导的热导率，散热器的结构以及灯泡的尺寸和布置，以提供大于80流明/瓦特的亮度和在150瓦的功率水平下的总亮度大于12000流明。
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公开(公告)号：US07347562B2
公开(公告)日：2008-03-25
申请号：US11131635
申请日：2005-05-18
IPC分类号： G03B21/00
CPC分类号： G03B21/2026 , G02B26/008 , G02B27/1026 , G02B27/141 , G02B27/283 , G03B21/2073 , H04N9/3111 , H04N9/3117
摘要： A two-panel projection display system includes a color wheel having color filter segments that transmit light having a secondary color, namely cyan, magenta, and yellow, made up of two primary colors. A primary color separator, such as a second color wheel, a transflective dichroic beamsplitter, or a color-sensitive polarizing switch separates the secondary color beam into a first polarized primary color beam and a second polarized primary color beam, which are directed to first and second imager panels. A beam combiner combines the first polarized primary color beam from the first imager and the second polarized primary color beam from the second imager to form a projection beam. Accordingly, any two primary colors can be imaged at the same time enabling the system to be white point balanced.
摘要翻译： 双面投影显示系统包括具有彩色滤光片段的色轮，该彩色滤光片段透射由二原色构成的二次色，即青色，品红色和黄色的光。 原色分离器，例如第二色轮，半透反射二分色分束器或色敏偏振开关将次色光束分离成第一偏振原色光束和第二偏振原色光束，其被定向到第一和第 第二个成像面板。 光束组合器将来自第一成像器的第一偏振原色光束和来自第二成像器的第二极化原色光束组合以形成投影光束。 因此，可以同时成像任何两种原色，使得系统能够被白点平衡。
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公开(公告)号：US10739651B2
公开(公告)日：2020-08-11
申请号：US16195618
申请日：2018-11-19
IPC分类号： G02F1/1347 , G02F1/13363 , G02F1/139
摘要： Used herein are two or more switchable variable birefringence liquid crystal devices, in combination with a passive retarder, to produce a device that switches between two retardation values. The device preserves the normal-incidence retardation in each of two voltage states over a broad range of incidence angles using a novel self-compensation scheme. According to one embodiment of this design, the retardation in the thickness direction remains zero in both the unenergized and fully energized states.
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公开(公告)号：US08319439B2
公开(公告)日：2012-11-27
申请号：US12562630
申请日：2009-09-18
申请人： Gregg Hollingsworth , Marc DeVincentis , Anthony D. McGettigan , Sandeep Mudunuri , Naresh Murthy , Dan O'Hare
发明人： Gregg Hollingsworth , Marc DeVincentis , Anthony D. McGettigan , Sandeep Mudunuri , Naresh Murthy , Dan O'Hare
CPC分类号： H01J65/042 , H05B41/2806 , Y02B20/22
摘要： An electrodeless plasma lamp and a method of controlling operation of a plasma lamp are provided. The plasma lamp may a power source to provide radio frequency (RF) power and a lamp body to receive the RF power from a feed. The lamp body may comprise a dielectric material having a dielectric constant greater than 2 and bulb is provided that contains a fill that forms a plasma that emits light when at least a portion of the RF power is coupled to the fill. A light guide directs light from the bulb to a photosensor that is shielded from light output from a front side of the lamp body. The lamp includes a drive circuit to control operation of the lamp based on a level of light detected by the photosensor.
摘要翻译： 提供无电极等离子体灯和控制等离子体灯的操作的方法。 等离子灯可以是提供射频（RF）功率的电源和灯体以从馈电接收RF功率。 灯体可以包括具有大于2的介电常数的介电材料，并且提供灯泡，其中包含形成当至少一部分RF功率耦合到填充物时发光的等离子体的填充物。 导光体将来自灯泡的光导向光电传感器，该光电传感器屏蔽了从灯体正面输出的光。 该灯包括驱动电路，用于基于由光电传感器检测到的光的水平来控制灯的操作。
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公开(公告)号：US20100156301A1
公开(公告)日：2010-06-24
申请号：US12562630
申请日：2009-09-18
申请人： Gregg Hollingsworth , Marc DeVincentis , Anthony D. McGettigan , Sandeep Mudunuri , Naresh Murthy , Dan O'Hare
发明人： Gregg Hollingsworth , Marc DeVincentis , Anthony D. McGettigan , Sandeep Mudunuri , Naresh Murthy , Dan O'Hare
IPC分类号： H05B37/02
CPC分类号： H01J65/042 , H05B41/2806 , Y02B20/22
摘要： An electrodeless plasma lamp and a method of controlling operation of a plasma lamp are provided. The plasma lamp may a power source to provide radio frequency (RF) power and a lamp body to receive the RF power from a feed. The lamp body may comprise a dielectric material having a dielectric constant greater than 2 and bulb is provided that contains a fill that forms a plasma that emits light when at least a portion of the RF power is coupled to the fill. A light guide directs light from the bulb to a photosensor that is shielded from light output from a front side of the lamp body. The lamp includes a drive circuit to control operation of the lamp based on a level of light detected by the photosensor.
摘要翻译： 提供无电极等离子体灯和控制等离子体灯的操作的方法。 等离子灯可以是提供射频（RF）功率的电源和灯体以从馈电接收RF功率。 灯体可以包括具有大于2的介电常数的介电材料，并且提供灯泡，其中包含形成当至少一部分RF功率耦合到填充物时发光的等离子体的填充物。 导光体将来自灯泡的光导向光电传感器，该光电传感器屏蔽了从灯体正面输出的光。 该灯包括驱动电路，用于基于由光电传感器检测到的光的水平来控制灯的操作。
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