公开(公告)号：US20120170099A1

公开(公告)日：2012-07-05

申请号：US13413799

申请日：2012-03-07

申请人： Robert C. Hoffman ,  Timothy Pritchett

发明人： Robert C. Hoffman ,  Timothy Pritchett

IPC分类号： G02F1/03 ,  B29C53/02

CPC分类号： G02F1/0338 ,  G02F1/061 ,  G02F2203/48 ,  Y10S359/90

摘要： A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer. The electro-optic shutter device is then activated by incident light through the photoconducting semiconductor switch, rendering the Pockels cell to have an optical density of at least 3.0.

摘要翻译： 大孔径直视高速电光快门包括构成为形成普克尔斯（Pockels）单元和集成光导半导体开关的电光聚合物材料。 发色团掺杂的聚合物材料或发色团共聚物，其中发色团定向在聚合物材料内，当电场施加到该装置时呈现线性电光效应。 在一个实施方案中，聚合物主体材料包含聚碳酸酯，无定形聚碳酸酯或聚甲基丙烯酸甲酯聚合物主体中的一种或多种。 包含一种或多种香豆素和香豆素衍生物的光学活性发色团，二苯乙烯或甲苯衍生物掺入聚合物主体内，形成客体 - 聚合物。 在另一个实施方案中，发色团与形成聚合物的单体化学键合，得到光学活性共聚物。 然后通过入射光通过光电半导体开关激活电光快门装置，使得普克尔斯细胞具有至少3.0的光密度。

公开(公告)号：US20100111124A1

公开(公告)日：2010-05-06

申请号：US12261391

申请日：2008-10-30

申请人： Robert C. Hoffman

发明人： Robert C. Hoffman

IPC分类号： H01S3/0941 ,  H01S3/14

CPC分类号： H01S5/347 ,  B82Y20/00 ,  H01S5/021 ,  H01S5/0213 ,  H01S5/02248 ,  H01S5/024 ,  H01S5/02415 ,  H01S5/02476 ,  H01S5/041

摘要： A method for emitting laser radiation includes: emitting first laser radiation using a first laser, wherein said first laser is a laser diode; receiving the first laser radiation by a second laser comprising CdSe(1−x)Sx (cadmium selenium sulfide, cadmium selenium, or cadmium sulfide), wherein x is between 0 and 1, inclusively; and responsive to receiving the first laser radiation by the second laser, emitting second laser radiation by the second laser via the CdSe(1−x)Sx; wherein the second laser radiation has a wavelength between 487 nm and 690 nm; and wherein the wavelength of the second laser radiation is responsive to the value of x, which represents the relative concentration of selenium and/or sulfur.

摘要翻译： 一种用于发射激光辐射的方法包括：使用第一激光器发射第一激光辐射，其中所述第一激光器是激光二极管; 通过包含CdSe（1-x）Sx（硫化镉硒，镉硒或硫化镉）的第二激光器接收第一激光辐射，其中x在0和1之间，包括; 并且响应于由第二激光器接收第一激光辐射，经由CdSe（1-x）Sx由第二激光器发射第二激光辐射; 其中所述第二激光辐射具有在487nm和690nm之间的波长; 并且其中所述第二激光辐射的波长响应于表示硒和/或硫的相对浓度的x值。

公开(公告)号：US20100020836A1

公开(公告)日：2010-01-28

申请号：US12178028

申请日：2008-07-23

申请人： Robert C. Hoffman

发明人： Robert C. Hoffman

IPC分类号： H01S5/10

CPC分类号： H01S5/1228 ,  H01S5/0654 ,  H01S5/1234 ,  H01S5/168 ,  H01S5/32316 ,  H01S2301/173

摘要： Current channels, blocking areas, or strips in a semiconductor laser are used to channel injected current into the antinodal region of the optical standing wave present in the optical cavity, while restricting the current flow to the nodal regions. Previous devices injected current into both the nodal and antinodal regions of the wave, which is fed by the population inversion created in the active region by the injected electrons and holes, but inversion created in the nodal regions is lost to fluorescence or supports the creation of undesirable competing longitudinal modes, causing inefficiency. Directing current to the antinodal regions where the electric field is at its maximum causes a selected longitudinal mode to preferentially oscillate regardless of where the longitudinal mode lies with respect to the gain curve. In one embodiment, exacting fabrication of the Fabry-Perot cavity correlates the current channels to antinodal regions, vis-a vis current blocking areas, strips or segmented layers.

摘要翻译： 半导体激光器中的电流通道，阻挡区域或条带用于将注入的电流引导到存在于光学腔中的光驻波的抗结块区域，同时限制电流到节点区域。 以前的装置将电流注入到波的节点和抗结点区域中，该区域由被注入的电子和空穴在有源区域中产生的群体反转馈送，但是在节点区域中产生的反转会失去荧光或支持产生 不良竞争的纵向模式，导致效率低下。 将电流引导到电场处于其最大值的抗结区，导致所选择的纵向模式优先振荡，而不管纵向模式相对于增益曲线位于何处。 在一个实施例中，法布里 - 珀罗腔的严格制造使得当前通道与抗结块区域相对于电流阻挡区域，条带或分段层相关。

公开(公告)号：US2114790A

公开(公告)日：1938-04-19

申请号：US14320537

申请日：1937-05-17

申请人： ROBERT C HOFFMAN

发明人： GORDON VENABLES JAMES

CPC分类号： A63B21/065 ,  A43B19/005 ,  A63B21/4001 ,  A63B21/4015

公开(公告)号：US08363300B2

公开(公告)日：2013-01-29

申请号：US13413799

申请日：2012-03-07

申请人： Robert C. Hoffman ,  Timothy Pritchett

发明人： Robert C. Hoffman ,  Timothy Pritchett

IPC分类号： G02F1/03

CPC分类号： G02F1/0338 ,  G02F1/061 ,  G02F2203/48 ,  Y10S359/90

摘要： A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer. The electro-optic shutter device is then activated by incident light through the photoconducting semiconductor switch, rendering the Pockels cell to have an optical density of at least 3.0.

摘要翻译： 大孔径直视高速电光快门包括构成为形成普克尔斯（Pockels）单元和集成光导半导体开关的电光聚合物材料。 发色团掺杂的聚合物材料或发色团共聚物，其中发色团定向在聚合物材料内，当电场施加到该装置时呈现线性电光效应。 在一个实施方案中，聚合物主体材料包含聚碳酸酯，无定形聚碳酸酯或聚甲基丙烯酸甲酯聚合物主体中的一种或多种。 包含一种或多种香豆素和香豆素衍生物的光学活性发色团，二苯乙烯或甲苯衍生物掺入聚合物主体内，形成客体 - 聚合物。 在另一个实施方案中，发色团与形成聚合物的单体化学键合，得到光学活性共聚物。 然后通过入射光通过光电半导体开关激活电光快门装置，使得普克尔斯细胞具有至少3.0的光密度。

公开(公告)号：US20100321756A1

公开(公告)日：2010-12-23

申请号：US12816417

申请日：2010-06-16

申请人： Robert C. Hoffman ,  Timothy Pritchett

发明人： Robert C. Hoffman ,  Timothy Pritchett

IPC分类号： G02F1/03 ,  B29C53/02 ,  B32B37/00

CPC分类号： G02F1/0338 ,  G02F1/061 ,  G02F2203/48 ,  Y10S359/90

摘要： A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer. The electro-optic shutter device is then activated by incident light through the photoconducting semiconductor switch, rendering the Pockels cell to have an optical density of at least 3.0.

摘要翻译： 大孔径直视高速电光快门包括构成为形成普克尔斯（Pockels）单元和集成光导半导体开关的电光聚合物材料。 发色团掺杂的聚合物材料或发色团共聚物，其中发色团定向在聚合物材料内，当电场施加到该装置时呈现线性电光效应。 在一个实施方案中，聚合物主体材料包含聚碳酸酯，无定形聚碳酸酯或聚甲基丙烯酸甲酯聚合物主体中的一种或多种。 包含一种或多种香豆素和香豆素衍生物的光学活性发色团，二苯乙烯或甲苯衍生物掺入聚合物主体内，形成客体 - 聚合物。 在另一个实施方案中，发色团与形成聚合物的单体化学键合，得到光学活性共聚物。 然后通过入射光通过光电半导体开关激活电光快门装置，使得普克尔斯细胞具有至少3.0的光密度。

公开(公告)号：US5409548A

公开(公告)日：1995-04-25

申请号：US234798

申请日：1994-04-28

申请人： Robert C. Hoffman

发明人： Robert C. Hoffman

IPC分类号： H01L37/02

CPC分类号： H01L37/025

摘要： A ferroelectric material, its fabrication technique, and use as a detectoraterial, in a ferroelectric detector array is disclosed. The material is an alloy of essential pure components of Pb.sub.2 (Fe, Nb)O.sub.2 and Pb.sub.2 (Fe, Ta)O.sub.2 each with respective Curie temperatures. An essentially linear relationship is made for mole fraction compositions versus Curie temperatures of each component in the alloy, between the pure mole fractions and respective Curie temperatures of the pure components. A Curie temperature for the composition of Pb.sub.2 (Fe, [Ta.sub.(1-x), Nb.sub.x ])O.sub.6 is determined, where x is the mole fraction of Pb.sub.2 (Fe,Nb)O.sub.2 and 1-x is the mole fraction of Pb.sub.2 (Fe, Ta)O.sub.2, with x having a value greater than zero and less than one.

摘要翻译： 公开了一种铁电材料，其制造技术和用作铁电探测器阵列中的检测器材料。 该材料是Pb2（Fe，Nb）O2和Pb2（Fe，Ta）O2的必需纯组分的合金，各自具有居里温度。 对于摩尔分数组成与合金中每种组分的居里温度，纯摩尔分数和纯组分的相应居里温度之间基本上呈线性关系。 确定Pb2（Fe，[Ta（1-x），Nbx]）O6的组成的居里温度，其中x是Pb2（Fe，Nb）O2的摩尔分数，1-x是Pb2的摩尔分数 （Fe，Ta）O 2，x的值大于零且小于1。

公开(公告)号：US2244351A

公开(公告)日：1941-06-03

申请号：US32425840

申请日：1940-03-16

申请人： ROBERT C HOFFMAN

发明人： VENABLES JAMES G

IPC分类号： A63B21/072

CPC分类号： A63B21/0728 ,  Y10T403/69 ,  Y10T403/7041

公开(公告)号：US4300847A

公开(公告)日：1981-11-17

申请号：US38942

申请日：1979-05-14

申请人： Robert C. Hoffman ,  Richard H. Kruse ,  Donald P. Martin

发明人： Robert C. Hoffman ,  Richard H. Kruse ,  Donald P. Martin

IPC分类号： B41J19/20 ,  B41J31/16 ,  B41J33/10 ,  B41J33/26

CPC分类号： B41J31/16 ,  B41J19/20 ,  B41J33/10 ,  B41J33/26 ,  Y10S400/902 ,  Y10S400/903

摘要： A teleprinter includes a carriage for conveying a dot matrix-type print head along an operating path parallel to a print-receiving surface. The carriage is mounted on parallel-spaced support rods by means of spaced bearings slidably engaged to one of the support rods, and a pair of perpendicularly-aligned guide rollers which engage the other guide rod. The carriage is advanced by a drive belt which extends along the carriage operating path and is attached to the carriage at either end. A stepper motor coupled to one of the pulleys drives the belt to position the carriage. A removable cartridge on the carriage contains an inked ribbon which is advanced with movement of the carriage by a drive gear engaged to the drive belt. A unidirectional clutch prevents the inked ribbon from moving in a reverse direction during carriage return.

摘要翻译： 电传打印机包括用于沿平行于打印接收表面的操作路径传送点阵式打印头的托架。 滑架通过可滑动地接合到一个支撑杆的间隔开的轴承和与另一个导杆接合的一对垂直对齐的导辊安装在平行间隔的支撑杆上。 滑架由沿着滑架操作路径延伸的传动皮带推进，并在两端连接到滑架上。 耦合到一个滑轮的步进马达驱动皮带以定位滑架。 滑架上的一个可移除的墨盒包含一个着色的色带，该墨带通过与驱动带啮合的驱动齿轮的运动而前进。 单向离合器防止墨盒在回车时反向移动。

公开(公告)号：US08315283B2

公开(公告)日：2012-11-20

申请号：US12178251

申请日：2008-07-23

申请人： Robert C. Hoffman

发明人： Robert C. Hoffman

IPC分类号： H01S3/10

CPC分类号： H01S3/09415 ,  H01S3/109

摘要： Laser systems and related methods are provided. In this regard, a representative laser system includes: a laser diode array that generates light; a first crystal having a cavity; an optical element operative to focus the generated light onto the first crystal such that the light generates a high-power circulating beam within the cavity; a second crystal positioned with respect to the first crystal such that the frequency of the high-power circulating beam is doubled; and a first coating applied to the first crystal and second coating applied to the second crystal, the first coating and the second coating being operative to cause at least a portion of the beam to be emitted within a particular wavelength range of the generated light.

摘要翻译： 提供激光系统及相关方法。 在这方面，代表性的激光系统包括：产生光的激光二极管阵列; 具有空腔的第一晶体; 光学元件，用于将所产生的光聚焦到所述第一晶体上，使得所述光在所述空腔内产生高功率循环光束; 相对于第一晶体定位的第二晶体，使得大功率循环光束的频率加倍; 以及施加到所述第一晶体的第一涂层和施加到所述第二晶体的第二涂层，所述第一涂层和所述第二涂层可操作以使所述光束的至少一部分在所产生的光的特定波长范围内被发射。