Mm-wave short flat-field Schmidt imager using one or more diffraction grating(s) and/or Fresnel lens(s)

    公开(公告)号:US11431921B2

    公开(公告)日:2022-08-30

    申请号:US16735105

    申请日:2020-01-06

    Inventor: Lacy G. Cook

    Abstract: A millimeter-wave optical imaging system including an imaging detector located at a focal plane of the optical imaging system, the imaging detector being responsive to electromagnetic radiation in wavelength range of approximately 5-50 millimeters, an immersion lens directly coupled to the imaging detector and configured to focus the electromagnetic radiation onto the imaging detector, wherein the focal plane is located on a planar surface of the immersion lens and the imaging detector is directly coupled to the planar surface, a positive power primary mirror configured to reflect the electromagnetic radiation towards the immersion lens, and one of a Fresnel lens or a diffraction grating configured to receive and direct the electromagnetic radiation towards the primary mirror.

    Optical sensor with jitter stabiliization

    公开(公告)号:US11363198B2

    公开(公告)日:2022-06-14

    申请号:US17064941

    申请日:2020-10-07

    Inventor: Lacy G. Cook

    Abstract: A system and method for measuring and removing jitter from an optical sensor includes a jitter stabilization system and at least one focal plane array. The jitter stabilization system is positioned at a shared focus of the focal plane array, which can be generated by an optical imager. A jitter signal of the jitter stabilization system makes a double pass through the system, contacting every reflective surface along the optical path within the system, before returning to a position sensing detector (PSD).

    Radiometric calibration of detector

    公开(公告)号:US11268860B2

    公开(公告)日:2022-03-08

    申请号:US16938797

    申请日:2020-07-24

    Inventor: Lacy G. Cook

    Abstract: Methods and apparatus for sensor calibration of a system having an aperture, primary mirror, secondary mirror, and a sensor, such as an FPA IR sensor. A calibration system includes calibration energy sources with a movable first mirror configured to be selectively inserted into the optical path and select one of the calibration energy sources and a second mirror configured to image the selected calibration energy source.

    Methods and apparatus for reducing specular return from wide field-of-view refractive optics

    公开(公告)号:US11262480B2

    公开(公告)日:2022-03-01

    申请号:US16444079

    申请日:2019-06-18

    Inventor: Lacy G. Cook

    Abstract: An optical imaging system including refractive optics and a blocking component. The refractive optical having an entrance aperture and configured to receive optical radiation via an operational aperture, to focus the optical radiation onto a focal plane to form a telecentric image plane co-located with the focal plane, the operational aperture being co-located with the entrance aperture, having a diameter less than half a diameter of the entrance aperture, and being offset from a primary optical axis that bisects the entrance aperture by at least a radius of the entrance aperture, and a blocking component located at the entrance aperture on an opposite side of the primary optical axis from the operational aperture. The blocking component being configured to block the optical radiation from exiting the refractive optics via a region of the entrance aperture where the blocking component is located.

    Two-color inverse telephoto refractive optical form with external pupil for cold shielding

    公开(公告)号:US10670841B2

    公开(公告)日:2020-06-02

    申请号:US15654835

    申请日:2017-07-20

    Inventor: Lacy G. Cook

    Abstract: A dual-band refractive inverse telephoto lens system configured for mid-wave infrared (MWIR) and long-wave infrared (LWIR) operation. In certain examples the dual-band refractive inverse telephoto lens system includes first, second, third, and fourth lenses, each constructed from a material that is optically transparent in the mid-wave infrared and long-wave infrared spectral bands, and has an external pupil coincident with an aperture stop of the refractive inverse telephoto lens system, the aperture stop being located between the first, second, third, and fourth lenses and the infrared imaging detector to allow for 100% cold shielding.

    All-reflective solar coronagraph sensor and thermal control subsystem

    公开(公告)号:US10345562B2

    公开(公告)日:2019-07-09

    申请号:US15426790

    申请日:2017-02-07

    Abstract: An all-reflective coronagraph optical system for continuously imaging a wide field of view. The optical system can comprise a fore-optics assembly comprising a plurality of mirrors that reflect light rays, about a wide field of view centered around the Sun, to an aft-optics assembly that reflects the light rays to an image sensor. A fold mirror, having an aperture, is optically supported between the fore-optics assembly and the aft-optics assembly. The aperture defines an angular subtense (e.g., 1.0 degree) sized larger than the angular subtense of the Sun. The aperture facilitates passage of a direct solar image and a solar thermal load. A thermal control subsystem comprises a shroud radiatively coupled to each fore-optics mirror and the fold mirror. A cold radiator is thermally coupled to each shroud. Heaters adjacent fore optics mirrors and the fold mirror control temperature to provide a steady state optical system to minimize wavefront error.

    TWO-COLOR VERY WIDE FIELD OF VIEW REFRACTIVE EYEPIECE-TYPE OPTICAL FORM

    公开(公告)号:US20190049705A1

    公开(公告)日:2019-02-14

    申请号:US15676419

    申请日:2017-08-14

    Inventor: Lacy G. Cook

    CPC classification number: G02B13/14 G02B3/04 G02B13/146 G02B25/001

    Abstract: A dual-band refractive optical system having an eyepiece-type arrangement and configured for mid-wave infrared and long-wave infrared operation. In one example the optical system includes a plurality of lenses, each constructed from a material that is optically transparent in the mid-wave infrared and long-wave infrared spectral bands. The lenses are arranged to receive infrared electromagnetic radiation in an operating waveband that includes at least a portion of the mid-wave infrared and at least a portion of the long-wave infrared spectral bands via a front external aperture stop and to focus the infrared electromagnetic radiation onto a rear image plane, the lenses being positioned between the front external aperture stop and rear image plane. The optical system can further include a corrector plate positioned coincident with the front aperture stop.

    ADVANCED OPTICS FOR IRST SENSOR
    48.
    发明申请
    ADVANCED OPTICS FOR IRST SENSOR 有权
    IRST传感器的先进光学

    公开(公告)号:US20160223394A1

    公开(公告)日:2016-08-04

    申请号:US14612524

    申请日:2015-02-03

    Inventor: Lacy G. Cook

    Abstract: An optical sensor system having an extended elevation field of view and in which the optics are configured around an all-reflective four-mirror reimaging anastigmat used for afocal foreoptics and an all-reflective five-mirror reimaging anastigmat used for imaging optics. One example of an optical sensor system includes afocal foreoptics configured to receive and collimate electromagnetic radiation, the afocal foreoptics including an all-reflective, reimaging four-mirror anastigmat, an imaging detector, focal imaging optics positioned between the afocal foreoptics and the imaging detector and configured to receive the collimated beam of electromagnetic radiation from the afocal foreoptics and to focus the beam of electromagnetic radiation onto the imaging detector, the focal imaging optics including a reimaging five-mirror anastigmat, wherein a field of view of the system is determined at least in part by a combination of the afocal foreoptics and the focal imaging optics and covers at least 5 degrees in elevation.

    Abstract translation: 一种光学传感器系统,其具有扩展的仰视视野,并且其中光学元件围绕用于无光放射学的全反射四镜反射无源镜配置,以及用于成像光学器件的全反射五镜像成像用无光扫描器。 光学传感器系统的一个例子包括被配置为接收和准直电磁辐射的无焦的前置光,该无光源的前置光学包括全反射的成像四镜无源扫描器,成像检测器,位于无焦前视和成像检测器之间的焦点成像光学器件,以及 被配置为接收来自所述无焦原理的准直光束的电磁辐射,并将所述电磁辐射束聚焦到所述成像检测器上,所述焦点成像光学器件包括再成像五镜式无源扫描器,其中至少确定所述系统的视场 部分原因在于无焦前眼和焦点成像光学元件的组合,并且覆盖至少5度的高度。

    COMPACT SHORT FLAT-FIELD SCHMIDT OPTICS FOR MM-WAVE OPERATION
    49.
    发明申请
    COMPACT SHORT FLAT-FIELD SCHMIDT OPTICS FOR MM-WAVE OPERATION 有权
    用于MM波操作的紧凑短平面场景光学

    公开(公告)号:US20160057364A1

    公开(公告)日:2016-02-25

    申请号:US14466290

    申请日:2014-08-22

    Inventor: Lacy G. Cook

    Abstract: Millimeter-wave optical imaging systems and methods. In one example, a mm-wave optical imaging system includes a mm-wave imaging detector located at a focal plane of the optical imaging system, an immersion lens directly coupled to the imaging detector and configured to focus the electromagnetic radiation onto the imaging detector, the immersion lens having a curved first surface and an opposing planar second surface, wherein the focal plane is located on the planar second surface and the imaging detector is directly coupled to the planar second surface, a positive power primary minor configured to reflect the electromagnetic radiation towards the immersion lens, and a Schmidt aspheric corrector configured to receive and direct the electromagnetic radiation towards the primary minor, wherein the system aperture stop is located on the Schmidt aspheric corrector.

    Abstract translation: 毫米波光学成像系统及方法。 在一个示例中,毫米波光学成像系统包括位于光学成像系统的焦平面处的毫米波成像检测器,直接耦合到成像检测器并配置成将电磁辐射聚焦到成像检测器上的浸没透镜, 所述浸没透镜具有弯曲的第一表面和相对的平面第二表面,其中所述焦平面位于所述平坦的第二表面上,并且所述成像检测器直接耦合到所述平面的第二表面;正功率初级副,被配置为反映所述电磁辐射 以及施密特非球面校正器,其被配置为接收并引导朝向主次要电极的电磁辐射,其中系统孔径光阑位于施密特非球面校正器上。

    Multiple access point laser communications terminal
    50.
    发明授权
    Multiple access point laser communications terminal 有权
    多点接入点激光通信终端

    公开(公告)号:US09166686B2

    公开(公告)日:2015-10-20

    申请号:US13764989

    申请日:2013-02-12

    Inventor: Lacy G. Cook

    CPC classification number: H04B10/118 G02B17/0636 G02B27/644 H04B10/1127

    Abstract: A laser communications terminal configured for simultaneous two-way stabilized communications links to multiple ground sites. One example of such a laser communications terminal includes a plurality of laser channels, each including a channel transceiver configured to transmit and receive an optical signal, an afocal telescope optically coupled to each of the channel transceivers, a coelostat mirror pair optically coupled to the afocal telescope, and a plurality of beam steering mirrors, at least one beam steering mirror associated with each channel of the plurality of laser channels and configured to independently steer the corresponding optical signal within a field of view of the afocal telescope.

    Abstract translation: 一种激光通信终端,被配置为同时向多个地面站点的双向稳定通信链路。 这种激光通信终端的一个例子包括多个激光通道,每个激光通道包括被配置为发送和接收光信号的通道收发器,光耦合到每个通道收发器的无焦点望远镜,与远焦点光学耦合的coelostat镜对 望远镜和多个光束转向镜,至少一个光束导向镜,与多个激光通道中的每个通道相关联并且被配置为在无焦望远镜的视野范围内独立地引导相应的光信号。

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