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    • 5. 发明授权
    • Electrically controlled multiple dispersion (zoom) device
    • 电控多分散(变焦)装置
    • US5264957A
    • 1993-11-23
    • US908111
    • 1992-07-02
    • Nathan T. MelamedMilton S. Gottlieb
    • Nathan T. MelamedMilton S. Gottlieb
    • G01J3/12G02B5/04G02F1/33
    • G02B5/04G01J3/1256G02F1/33G02F2203/22
    • The optical device can examine a spectrum at low resolution and subsequently choose a portion of that spectrum to be examined at higher resolution, using a single detector array for both spectra. The latter spectrum can be chosen to be arbitrarily anywhere within the low resolution spectrum. The device comprises a source of input light, a wedged shaped dispersive device, a first reflective mirror, a second reflective mirror, a RF generator connected to the dispersive device, and a detector array. In operation, the dispersive device provides a low dispersion spectrum in the zero order light when the source of light is impinged upon it. When the RF generator is turned on, a second spectrum which is diffracted is obtained. This will be the high resolution spectrum. By operating near 100% diffraction efficiency, it is possible to switch from one spectrum to the other. By adjusting the RF frequency the band center of the high resolution spectrum can be varied to fall anywhere within the low resolution spectrum. Since the two spectra will not normally physically fall in the same place, the zero order spectrum is reflected by a first mirror onto the detector array and the diffracted spectrum is reflected by a second mirror on to the detector array so that the two spectra overlay and fall in the same detector array.
    • 光学器件可以以低分辨率检查光谱,然后使用两个光谱的单个检测器阵列选择要以更高分辨率检查的该光谱的一部分。 后一种光谱可以选择为低分辨率光谱内的任意位置。 该装置包括输入光源,楔形分散装置,第一反射镜,第二反射镜,连接到分散装置的RF发生器和检测器阵列。 在操作中,当光源撞击它时,色散装置在零级光中提供低色散谱。 当RF发生器接通时,获得衍射的第二个光谱。 这将是高分辨率光谱。 通过操作近100%的衍射效率,可以从一个光谱切换到另一个光谱。 通过调整RF频率,高分辨率频谱的频带中心可以变化到低分辨率频谱内的任何地方。 由于两个光谱通常不会物理上落在相同的位置,所以零阶光谱被第一反射镜反射到检测器阵列上,并且衍射光谱被第二反射镜反射到检测器阵列上,使得两个光谱重叠和 落在相同的检测器阵列中。
    • 8. 发明授权
    • Acousto-optic tunable filter apparatus and method for detecting and
identifying an optical radiation source.
    • 用于检测和识别光辐射源的声光可调滤波器装置和方法。
    • US5111038A
    • 1992-05-05
    • US654170
    • 1991-02-12
    • Lyle H. TaylorNathan T. MelamedMilton S. Gottlieb
    • Lyle H. TaylorNathan T. MelamedMilton S. Gottlieb
    • G01J1/42G01S7/48G01S7/499
    • G01J1/42G01S7/4802G01S7/499
    • A source of broad-band and/or narrow band optical radiation is detected and identified by apparatus including a pair of acousto-optical tunable filters which diffract from orthogonally polarized components of the optical radiation, a diffracted ordinary polarized beam and diffracted extraordinary beam, respectively. Undiffracted polarized radiation from the two AOTFs is combined and directed to a first detector which may comprise a small array such as a quadrant array. The diffracted ordinary and extraordinary polarized beams are directed to a second detector which is preferably a single large imaging array. A signal processor uses signals from the first detector generated by the undiffracted beams to detect the presence of the source, and polarized spectral signals from the large imaging array to identify the source of the radiation . A control unit generates radio frequency signals which can be rapidly varied in frequency to control wavelength of the polarized beams diffracted by the AOTFs. These radio frequency (rf) signals may be applied simultaneously, with or without amplitude modulation, or sequentially, to the AOTFs, and may be of the same or different frequencies. The rf drive may be withheld from the AOTFs to maximize the undiffracted beams for maximum range detection.
    • 宽带和/或窄带光辐射源由包括一对声光可调谐滤波器的装置检测和识别,该对声光可调滤波器分别从光辐射的正交极化分量衍射,衍射普通偏振光束和衍射非寻常光束 。 来自两个AOTF的非衍射偏振辐射被组合并引导到第一检测器,其可以包括诸如象限阵列的小阵列。 衍射的普通和非常偏振光束被引导到第二检测器,其优选地是单个大的成像阵列。 信号处理器使用由未衍射光束产生的第一检测器的信号来检测源的存在,以及来自大成像阵列的偏振光谱信号以识别辐射源。 控制单元生成频率快速变化的射频信号,以控制由AOTF衍射的偏振光束的波长。 这些射频(RF)信号可以同时或不伴随幅度调制或顺序施加到AOTF,并且可以具有相同或不同的频率。 可以从AOTF中保留rf驱动器,以最大化未扩散的光束以进行最大范围检测。