-
公开(公告)号：US5479018A
公开(公告)日：1995-12-26
申请号：US348939
申请日：1989-05-08
IPC分类号： G01J5/20 , H01L27/144 , H01L31/0216 , H01L31/0232 , H01L27/14
CPC分类号： H01L27/1446 , G01J5/20 , H01L27/1462 , H01L31/02161 , H01L31/0232
摘要： An infrared detector, having improved infrared absorptance and operating performance at or near ambient as well as the cryogenic temperature ranges. The infrared detector, in one embodiment includes a multi-filament HgCdTe detector region mounted upon a CdTe substrate, a metallic reflective region placed in front of, or behind, the HgCdTe detection region forming a resonant layer between the reflective region and HgCdTe. Electrical contacts operable to detect the change in resistance of the HgCdTe detector filaments are connected to the detector region. Embodiment for a back surface illuminated detector device is described for use in the 8 micron to 12 micron, longwave infrared (LWIR) range. Improved operation in the LWIR range at higher temperatures results in detector arrays having decreased cooling needs and infrared detector systems produced with a significant decrease in overall system weight.
摘要翻译： 一种红外检测器，在环境温度或接近环境温度范围内具有改进的红外吸收率和操作性能。 在一个实施例中，红外检测器包括安装在CdTe衬底上的复丝HgCdTe检测器区域，放置在形成反射区域和HgCdTe之间的谐振层的HgCdTe检测区域的前面或后面的金属反射区域。 可操作以检测HgCdTe检测器丝的电阻变化的电触点连接到检测器区域。 描述了用于8微米至12微米长波红外（LWIR）范围的后表面照明检测器装置的实施例。 在较高温度下改进的LWIR范围内的操作导致检测器阵列具有降低的冷却需求，并且红外检测器系统产生的总体系统重量显着降低。
-
公开(公告)号：US5737075A
公开(公告)日：1998-04-07
申请号：US354669
申请日：1994-12-13
申请人： Mark E. Koch , William E. Case
发明人： Mark E. Koch , William E. Case
CPC分类号： G01S17/89 , G01S7/4816 , H04N5/217 , H04N5/30
摘要： A new system for millimeter wave electronic imaging is described. This system utilizes a spatial light modulator in the focal plane of the collection optics. Each pixel of the modulator is driven by a specific high duty cycle modulation function provided by a modulation function generation circuit. Thus the throughput radiation at each pixel is uniquely labeled(encoded). A post modulation detector sums the signal from all the pixels. Subsequent to detection, the appropriate transform of the sum signal yields specific pixel throughput radiation intensity levels. Several configurations are described including one transmittance configuration and two reflectance configurations. Three specific millimeter wave transmittance embodiments and one reflectance embodiment are also described.
摘要翻译： 描述了一种用于毫米波电子成像的新系统。 该系统在收集光学器件的焦平面中利用空间光调制器。 调制器的每个像素由调制函数生成电路提供的特定高占空比调制功能驱动。 因此，每个像素处的吞吐量辐射被唯一地标记（编码）。 后调制检测器将来自所有像素的信号相加。 在检测之后，和信号的适当变换产生特定像素吞吐量辐射强度水平。 描述了一些配置，包括一个透射率配置和两个反射配置。 还描述了三个具体的毫米波透射率实施例和一个反射率实施例。
-
公开(公告)号：US4477906A
公开(公告)日：1984-10-16
申请号：US370174
申请日：1982-04-20
申请人： William E. Case
发明人： William E. Case
摘要： Stimulated emission at the approximate wave length of 4.5 microns, 2.25 microns and 1.6 microns is obtained from pumping on an excited energy level. The phenomenon of photon avalanching is utilized to create a population inversion within three lower level states that have a substantially equal energy spacing to provide resonance between neighboring ions. This resonance feeds the photon avalanching process when pump having sufficient power in excess of the critical pump power irradiates a LaCl.sub.3 :Pr.sup.+3 crystal at an excited energy level to maintain a population inversion in an optical cavity.
摘要翻译： 在激发能级泵浦获得在4.5微米，2.25微米和1.6微米近似波长的受激发射。 利用光子雪崩的现象，在三个较低级别的状态下产生具有基本上相等的能量间隔以提供相邻离子之间共振的群体反演。 当泵具有超过临界泵浦功率的足够功率的泵以激发能级照射LaCl 3 :Pr + 3晶体以维持光腔中的群体反转时，该共振馈送光子雪崩过程。
-
公开(公告)号：US5274658A
公开(公告)日：1993-12-28
申请号：US943786
申请日：1992-09-11
申请人： William E. Case , Mark E. Koch
发明人： William E. Case , Mark E. Koch
CPC分类号： H01S3/16 , H01S3/094 , H01S3/094092
摘要： Devices and methods are taught by this invention of populating excited energy levels with fundamental particles. When these populated excited energy levels are further pumped, a population inversion used in quantum electronic applications can result. Each of the various methods involve pumping on an excited energy level of an elemental physical system to cause, by the absorption of energy, the transition of fundamental particles from the excited energy level to a higher energy level. Part of the energy is used for transition of fundamental particles residing in neighboring elemental physical systems from the lowest energy to the excited energy level.
摘要翻译： 本发明通过用基本粒子填充激发能级来教导装置和方法。 当这些填充的激发能级被进一步泵浦时，可以产生在量子电子应用中使用的群体反演。 各种方法中的每一种都涉及泵浦元素物理系统的激发能级，以通过吸收能量将基本粒子从激发能级转变到更高的能级。 能量的一部分用于将相邻元素物理系统中的基本粒子从最低能量转变为激发能级。
-
公开(公告)号：US5164953A
公开(公告)日：1992-11-17
申请号：US604614
申请日：1990-10-26
申请人： William E. Case , Mark E. Koch
发明人： William E. Case , Mark E. Koch
CPC分类号： H01S3/16 , H01S3/094 , H01S3/094092
摘要： Devices and methods are taught by this invention of populating excited energy levels with fundamental particles. When these populated excited energy levels are further pumped, a population inversion used in quantum electronic applications can result. Each of the various methods involve pumping on an excited energy level of an elemental physical system to cause, by the absorption of energy, the transition of fundamental particles from the excited energy level to a higher energy level. Part of the energy is used for transition of fundamental particles residing in neighboring elemental physical systems from the lowest energy to the excited energy level.
摘要翻译： 本发明通过用基本粒子填充激发能级来教导装置和方法。 当这些填充的激发能级被进一步泵浦时，可以产生在量子电子应用中使用的群体反演。 各种方法中的每一种都涉及泵浦元素物理系统的激发能级，以通过吸收能量将基本粒子从激发能级转变到更高的能级。 能量的一部分用于将相邻元素物理系统中的基本粒子从最低能量转变为激发能级。
-
公开(公告)号：US4528525A
公开(公告)日：1985-07-09
申请号：US296076
申请日：1981-08-25
申请人： Dayton D. Eden , William E. Case
发明人： Dayton D. Eden , William E. Case
CPC分类号： G02F2/002 , G01S17/42 , G01S7/4812 , G01S7/4911 , G01S7/4917 , H01S3/086 , H01S3/10
摘要： In an optical radar system a coherent signal is transmitted at a variable position and the return signal, that is, the reflected portion of the coherent signal is received and coherently detected. The transmitter utilizes a scanning laser having an electron beam that impinges upon a variable reflectance mirror that terminates one end of an optical cavity. An oscillating mode is generated within the resonant cavity when the electron beam locally heats the surface of the variable reflectance mirror to create a pixel that reflects light in a diffracted pattern. The receiver utilizes a stable single mode laser to illuminate a variable reflectance surface. A receiver electron beam generates a plurality of receiver pixels at various positions. The diffracted light from each pixel generates a plurality of variable angle local oscillator beams that are summed with the return signal at a beamsplitter. The output of the beamsplitter is applied to the surface of a detector array. One of the local oscillator beams is positioned such that the return signal and the local oscillator beam overlap at one of the detectors in the array to provide coherent detection. The frequency of the first coherent signal and the second coherent signal are sampled by a first and second partially reflecting mirror. A frequency detector detects the output of the first and second partially reflecting mirror to detect the frequency difference between the first and second coherent signal and generate a control signal that adjusts the frequency of the first coherent signal. For heterodyne operation a selected frequency difference is generated whereas for homodyne detection a zero frequency difference is generated. An electronic computer coordinates the position of the scanning laser of the transmitter and the position of the local oscillator beams of the receiver such that one of the local oscillator beams will overlap with each of the corresponding return signals at the detector array. A second electronic computer processes the output of the detector array to provide information about the return signal.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.019 秒)
