WIDE ANGLE, NARROW BAND OPTICAL FILTER
    1.
    发明申请
    WIDE ANGLE, NARROW BAND OPTICAL FILTER 审中-公开
    宽角度,窄带光学滤波器

    公开(公告)号:WO1994014090A1

    公开(公告)日:1994-06-23

    申请号:PCT/US1993012203

    申请日:1993-12-14

    CPC classification number: G02B6/4215 G02B6/29361

    Abstract: The object of the invention is to provide an optical filtering system which can utilize wide angle optics and still maintain a very narrow pass band. A filtering system (100) is disclosed for receiving and bandpass filtering free space optical signals. The filtering system (100) includes a compound parabolic concentrator (110) with a small aperture for accepting the free space optical signals (115) and a larger aperture whereby the optical signal (115) exits. The compound parabolic concentrator (110) has a reflective coating on the inner surface to reflect incident optical signals (115) to produce a substantially collimated signal beam. The collimated signal is further passed through a narrow, bandpass filter (140) before detection by a photodetector device (150). In an alternative embodiment, a compound hyperbolic concentrator (310) is utilized to reflect the incident optical signals and produce a substantially collimated signal beam.

    Abstract translation: 本发明的目的是提供一种可以利用广角光学器件并且仍然保持非常窄的通带的光学滤波系统。 公开了一种用于接收和带通滤波自由空间光信号的滤波系统(100)。 过滤系统(100)包括具有小孔径的复合抛物面聚光器(110),用于接受自由空间光信号(115)和较大的光圈,由此光信号(115)离开。 复合抛物面聚光器(110)在内表面上具有反射涂层以反射入射光信号(115)以产生基本上准直的信号光束。 准直信号在由光电检测器件(150)检测之前进一步通过窄带通滤波器(140)。 在替代实施例中,使用复合双曲线聚光器(310)来反射入射光信号并产生基本上准直的信号光束。

    WIDE ANGLE, NARROW BAND OPTICAL FILTER
    2.
    发明申请
    WIDE ANGLE, NARROW BAND OPTICAL FILTER 审中-公开
    宽角度,窄带光学滤波器

    公开(公告)号:WO1994014181A1

    公开(公告)日:1994-06-23

    申请号:PCT/US1993012195

    申请日:1993-12-14

    Abstract: The object of the invention is to provide an optical filtering system which can utilize wide angle optics and still maintain a very narrow pass band. A filtering system (100) is disclosed for receiving and bandpass filtering free space optical signals. The filtering system (100) includes a plurality of optical fibers (110) for accepting an optical signal. The fibers (110) are implanted in an embedding material (120), having an index of refraction which is less than the optical fiber, for collimating the optical signal. The signal is further passed through a narrow, bandpass filter (140) before detection by a photodetector device (150). In an alternative embodiment, the optical fibers (110) are enclosed in a cladding (310), having a surface roughness at the interface of the cladding and the fiber, for enhancing the collimation of the optical signal.

    Abstract translation: 本发明的目的是提供一种可以利用广角光学器件并且仍然保持非常窄的通带的光学滤波系统。 公开了一种用于接收和带通滤波自由空间光信号的滤波系统(100)。 滤波系统(100)包括用于接受光信号的多个光纤(110)。 将纤维(110)注入到具有比光纤小的折射率的嵌入材料(120)中,以准直光信号。 在由光电检测器件(150)检测之前,该信号进一步通过窄带通滤波器(140)。 在替代实施例中,光纤(110)被封装在包层(310)中,在包层和光纤的界面处具有表面粗糙度,以增强光信号的准直。

Patent Agency Ranking