公开(公告)号：US20180227050A1

公开(公告)日：2018-08-09

申请号：US15427608

申请日：2017-02-08

Applicant: Sensors Unlimited, Inc.

Inventor： Jonathan Nazemi

IPC: H04B10/11 ,  H04B10/50 ,  H04B10/66 ,  H04L7/00

CPC classification number: H04L7/0075 ,  H04B10/112

Abstract: A method of free space optical communication includes receiving a pulsed optical signal through free space, wherein the pulsed optical signal is received by a receiver device from a laser source device. The method includes decoding the pulsed optical signal in the receiver device, wherein decoding is performed asynchronously with respect to the laser source device. Receiving can include receiving the pulsed optical signal from a reflection of the laser source device when direct line of sight between the receiver device and the laser source device is unavailable. Decoding the pulsed optical signal can include decoding a communication that includes at least one of text, voice, or data.

公开(公告)号：US09992432B2

公开(公告)日：2018-06-05

申请号：US14987372

申请日：2016-01-04

Applicant: Sensors Unlimited, Inc.

Inventor： Jonathan Nazemi

IPC: H04N5/365 ,  H04N5/33 ,  H04N5/378 ,  H04N5/374 ,  G01J5/00 ,  H05B1/02

CPC classification number: H04N5/3655 ,  H04N5/33 ,  H04N5/3651 ,  H04N5/378

Abstract: A method of normalizing FPA system gain and correcting pixel non-uniformity for varying temperature includes determining an FPA temperature, calculating an FPA system gain as a function of the FPA temperature, and applying the FPA system gain at the FPA temperature to condition output of the FPA to produce temperature independent image data. The method also includes calculating a non-uniformity correction map on a pixel by pixel basis for the FPA, wherein non-uniformity correction for each pixel is a function of the FPA temperature, and applying the non-uniformity correction map to the imaging data from the FPA to produce temperature dependent non-uniformity corrected image data. An imaging system includes a focal plane array (FPA), a temperature sensor operatively connected to measure temperature of the FPA, and a module configured for system gain correction and non-uniformity correction as described above.

公开(公告)号：US20170358066A1

公开(公告)日：2017-12-14

申请号：US15178888

申请日：2016-06-10

Applicant: Sensors Unlimited, Inc.

Inventor： Jonathan Nazemi

IPC: G06T5/40 ,  H04N5/235 ,  G06T5/00

CPC classification number: G06T5/40 ,  G06T5/009 ,  G06T2207/20072 ,  G06T2207/20208 ,  H04N5/2355

Abstract: A method of enhancing an image includes constructing an input histogram corresponding to an input image received at a focal plane array, the input histogram representing a pixel intensity distribution corresponding to the input image and performing an analytical operation on the input histogram to produce a modified cumulative distribution, wherein the analytical operation is a function of camera temperature. The input image is transformed using the modified cumulative distribution to produce an enhanced output image corresponding to the input image, wherein at least a portion of the input image is enhanced in the output image. In addition to or in lieu of the non-linear operation, the binning edges of the input histogram can be adjusted based on at least one of camera temperature and sensitivity state to construct an adjusted cumulative distribution.

公开(公告)号：US20170299236A1

公开(公告)日：2017-10-19

申请号：US15099958

申请日：2016-04-15

Applicant: Sensors Unlimited, Inc.

Inventor： Jonathan Nazemi ,  Michael Delamere ,  Marc Hansen ,  Jinguo Yu

IPC: F25B21/02

CPC classification number: F25B21/02 ,  H04N5/33

Abstract: A method of controlling FPA system stabilization includes calculating FPA adjustments as a function of FPA temperature and adjusting a TEC set point to assist the FPA adjustments in attaining a predetermined level of FPA performance. Adjusting the TEC set point can include adjusting the TEC set point as a function of at least one of ambient temperature, FPA temperature, or disparity between the predetermined level of FPA performance and a level of FPA performance obtainable by calculating the FPA adjustments as a function of FPA temperature alone without adjusting the TEC set point.

公开(公告)号：US20160282179A1

公开(公告)日：2016-09-29

申请号：US14938409

申请日：2015-11-11

Applicant: Sensors Unlimited, Inc.

Inventor： Jonathan Nazemi ,  Robert Rozploch ,  John P. Barby ,  Andrew Eckhardt

IPC: G01J1/44

CPC classification number: G01S17/66 ,  F41G3/145 ,  F41G3/165 ,  F41G7/226 ,  F41G7/2293 ,  G01J1/0295 ,  G01J1/0488 ,  G01J1/44 ,  G01J2001/4238 ,  G01S7/484 ,  G01S7/4861 ,  G01S17/003

Abstract: A pulse repetition frequency detector, tracker, and decoder includes a two-dimensional InGaAs FPA of photodetectors configured to convert laser signals into electrical signals. A ROIC is operatively connected to the InGaAs FPA to condition electrical signals from the InGaAs FPA. A module is operatively connected to the ROIC to decode pulsed codes in the conditioned electrical signals and to provide output for tracking decoded laser spots in two-dimensional space. In another aspect, an imaging device includes an imager with an imaging FPA operatively connected to a first ROIC for imaging. A pulse repetition frequency detector, tracker, and decoder including a second ROIC as described above, is operatively connected to the first ROIC. The first and second ROICs are operatively connected to correlate the position of decoded laser spots in images from the imaging FPA.

Abstract translation: 脉冲重复频率检测器，跟踪器和解码器包括被配置为将激光信号转换成电信号的光电检测器的二维InGaAs FPA。 ROIC可操作地连接到InGaAs FPA以调节来自InGaAs FPA的电信号。 模块可操作地连接到ROIC以对经调节的电信号中的脉冲编码进行解码，并提供用于跟踪二维空间中的解码激光点的输出。 在另一方面，一种成像装置包括具有可操作地连接到第一ROIC用于成像的成像FPA的成像器。 包括如上所述的第二ROIC的脉冲重复频率检测器，跟踪器和解码器可操作地连接到第一ROIC。 第一和第二ROIC可操作地连接以将来自成像FPA的图像中的解码激光点的位置相关联。