公开(公告)号：US07259861B1

公开(公告)日：2007-08-21

申请号：US10959941

申请日：2004-10-06

Applicant: David James Crain ,  Douglas L. Cohen

Inventor： David James Crain ,  Douglas L. Cohen

IPC: G01B9/02

CPC classification number: G01J3/45

Abstract: A method for measuring scene inhomogeneity includes directing radiance of a scene into an interferometer; and oscillating a field-of-view (FOV) of the interferometer, while directing the radiance of the scene into the interferometer. A Fourier transform of signals emerging from the interferometer is obtained with magnitude values of the Fourier transform as a function of wavelength. The magnitude values are separated into (1) component values occurring within a predetermined wavelength band of the interferometer and (2) a component value occurring outside the predetermined wavelength band. The component value occurring outside the predetermined wavelength band is used to measure scene inhomogeneity.

Abstract translation: 用于测量场景不均匀性的方法包括将场景的辐射指向干涉仪; 并且在将场景的辐射度引导到干涉仪中的同时，振荡干涉仪的视场（FOV）。 通过傅立叶变换的幅度值作为波长的函数，获得从干涉仪产生的信号的傅立叶变换。 幅度值被分成在干涉仪的预定波长带内发生的（1）分量值，和（2）在预定波长带外发生的分量值。 在预定波长带外发生的分量值用于测量场景不均匀性。

公开(公告)号：US07355705B1

公开(公告)日：2008-04-08

申请号：US11159883

申请日：2005-06-23

Applicant: Douglas Lent Cohen ,  David James Crain ,  Richard James Hertel

Inventor： Douglas Lent Cohen ,  David James Crain ,  Richard James Hertel

IPC: G01J3/28

CPC classification number: G01J3/04 ,  G01J3/02 ,  G01J3/0229 ,  G01J3/0289 ,  G01J3/2803 ,  G01J3/2823

Abstract: A method for measuring scene inhomogeneity includes the steps of directing radiance of a scene into a dispersive spectrometer, and changing the field-of-view (FOV) of the spectrometer, while directing the radiance of the scene into the spectrometer. The method then processes the radiance of the scene to obtain a signal. The method also includes measuring an amplitude of the signal and determining scene inhomogeneity based on the measured amplitude of the signal. The method may include uniformly oscillating the FOV of the spectrometer and, next, obtaining a sinusoidal signal, based on uniformly oscillating the FOV of the spectrometer.

Abstract translation: 用于测量场景不均匀性的方法包括将场景的辐射指向分散光谱仪的步骤，以及改变光谱仪的视场（FOV），同时将场景的辐射指向光谱仪。 该方法然后处理场景的辐射度以获得信号。 该方法还包括基于信号的测量幅度来测量信号的幅度和确定场景不均匀性。 该方法可以包括均匀振荡光谱仪的FOV，并且接下来，基于均匀振荡光谱仪的FOV获得正弦信号。

公开(公告)号：US07791719B1

公开(公告)日：2010-09-07

申请号：US12013523

申请日：2008-01-14

Applicant: Douglas Lent Cohen ,  David James Crain ,  Richard James Hertel

Inventor： Douglas Lent Cohen ,  David James Crain ,  Richard James Hertel

IPC: G01J1/56 ,  G01P3/40

CPC classification number: G01J1/08 ,  G01J1/02 ,  G01J1/0266 ,  G01J1/04 ,  G01J1/0403 ,  G01J5/007 ,  G01J5/04 ,  G01J5/047 ,  G01J5/08 ,  G01J5/089 ,  G01J2005/0048

Abstract: An optical system measures scene inhomogeneity. The system includes a mirror for receiving radiance of a field-of-view (FOV) of a scene, and reflecting a portion of the radiance to an optical detector. A controller is coupled to the mirror for changing the FOV. The optical detector provides a signal of the reflected portion of radiance of the scene. A processor determines scene inhomogeneity, based on amplitude of the signal provided from the optical detector. The controller is configured to modulate the FOV at a periodic interval, using a sinusoidal waveform, a pulse code modulated waveform, or a pseudo-random waveform.

Abstract translation: 光学系统测量场景不均匀性。 该系统包括用于接收场景的视场（FOV）的辐射的反射镜，并将辐射的一部分反射到光学检测器。 控制器耦合到镜子以改变FOV。 光学检测器提供场景的反射部分的信号。 处理器基于从光学检测器提供的信号的幅度来确定场景不均匀性。 控制器被配置为使用正弦波形，脉冲编码调制波形或伪随机波形以周期性间隔调制FOV。