公开(公告)号：EP1982227A1

公开(公告)日：2008-10-22

申请号：EP07705142.3

申请日：2007-02-06

申请人： QinetiQ Limited

发明人： SLINGER, Christopher, William

IPC分类号： G02B27/44 ,  G01T1/29

CPC分类号： G02B27/4294 ,  G01T1/295 ,  G02B27/4205 ,  G02B2207/129

摘要： The present invention relates to an imaging system which employs the same principles as coded aperture imaging. High angular resolution coded aperture imagers require a small aperture size and relatively large spacing between the coded aperture array and the detector. At such high resolutions diffraction effects can start to dominate and can degrade image quality. The present invention provides a detector array which receives radiation from a scene via a coded diffractive mask. The coded diffractive mask is designed such that its diffraction pattern at the waveband of interest is a well conditioned coded intensity pattern having a strong autocorrelation function with low sidelobes. Thus radiation reaching the detector array is diffracted by the diffractive mask but in a defined way and it is the diffraction pattern of the mask which provides the coding. The scene image can then be reconstructed using the same techniques as for conventional coded aperture imaging but using the diffraction pattern of the mask as the aperture function. The coded diffractive mask may be a binary or greyscale mask, may operate in reflection or transmission and may be an amplitude or phase modulating mask.

摘要翻译： 本发明涉及采用与编码孔径成像相同原理的成像系统。 高角分辨率编码孔径成像器需要小孔径尺寸和编码孔径阵列与检测器之间的相对大的间距。 在如此高的分辨率下，衍射效应可能开始占据主导地位，并可能降低图像质量。 本发明提供了一种探测器阵列，其通过经编码的衍射掩模从场景接收辐射。 编码的衍射掩模被设计为使得其在感兴趣的波段处的衍射图案是具有低旁瓣的强自相关函数的良好调节的编码强度图案。 因此，到达探测器阵列的辐射被衍射掩模衍射，但是以确定的方式衍射，并且它是提供编码的掩模的衍射图案。 然后可以使用与常规编码孔径成像相同的技术重建场景图像，但是使用掩模的衍射图案作为孔径函数。 编码的衍射掩模可以是二进制或灰度掩模，可以在反射或透射中操作并且可以是幅度或相位调制掩模。

公开(公告)号：EP1982227B1

公开(公告)日：2013-07-24

申请号：EP07705142.3

申请日：2007-02-06

申请人： QinetiQ Limited

发明人： SLINGER, Christopher, William

IPC分类号： G02B27/44 ,  G01T1/29

CPC分类号： G02B27/4294 ,  G01T1/295 ,  G02B27/4205 ,  G02B2207/129

公开(公告)号：EP1982215A1

公开(公告)日：2008-10-22

申请号：EP07705138.1

申请日：2007-02-06

申请人： QinetiQ Limited

发明人： SLINGER, Christopher, William ,  DE VILLIERS, Geoffrey, Derek ,  PAYNE, Douglas, Alan

IPC分类号： G01T1/29

CPC分类号： G01T1/295 ,  G02B2207/129

摘要： The present invention relates to processing of coded aperture images. Multiple frames of data acquired by the coded aperture imaging system, each with a different coded aperture array, are processed to form an image. The processing incorporates the constraints that the image solution must be positive and that the solution should be zero outside an expected image region. In one embodiment image enhancement may involve dividing the processed image into image regions having a spatially invariant point spread function and solving an inverse problem for each image region to reduce image blurring.

公开(公告)号：EP2324456A1

公开(公告)日：2011-05-25

申请号：EP09784819.6

申请日：2009-07-30

申请人： QinetiQ Limited

发明人： DE VILLIERS, Geoffrey, Derek ,  RIDLEY, Kevin, Dennis ,  SLINGER, Christopher, William ,  STRENS, Malcolm, John, Alexander

IPC分类号： G06T3/40 ,  G06T5/50 ,  G01T1/29

CPC分类号： G06T3/4053 ,  G06T5/50 ,  G06T2200/21 ,  G06T2207/10052

摘要： A method of reconstructing an image of a scene (4) from data output by a detector (8) in a coded aperture imaging system (2) comprises taking multiple frames of data using a different coded aperture array 6 for each frame. For each frame of data a decoding pattern is employed which is point source diffraction pattern corresponding to the coded aperture array used to acquire that frame. The decoding patterns are combined in a Gram matrix. A two-dimensional to one-dimensional mapping is applied to the frames of data. A solution to the data is constructed which is related to the scene (4) by an integral operator. The integral operator has an averaging kernel with a main lobe width which is smaller than the detector pixel size. Processing of the data yields an image which has sub-pixel resolution,
i.e. resolution greater than the native resolution of the detector (8).

公开(公告)号：EP1982218A1

公开(公告)日：2008-10-22

申请号：EP07705145.6

申请日：2007-02-06

申请人： QINETIQ LIMITED

发明人： MCNIE, Mark, Edward ,  LEWIS, Keith, Loder ,  SCOTT, Andrew, Maxwell ,  SLINGER, Christopher, William ,  BRUNSON, Kevin, Michael ,  SMITH, Gilbert, William

IPC分类号： G02B5/28 ,  G02B26/00

CPC分类号： G02B26/001 ,  G02B5/281 ,  G02B5/284

摘要： A micro-opto-electro-mechanical systems (MOEMS) electro optical modulator (2) having an electrically tuneable optical resonator comprising an asymmetric Fabry-Perot etalon incorporating a mirror (10) resiliency biased with respect to a substrate (13) and moveable in relation thereto in response to a voltage applied there-between. The optical modulator (2) is capable of modulating electromagnetic radiation having a plurality of wavelengths. The modulator is adapted to modulate the transmission of short wave infrared radiation (SWIR), medium wave infrared radiation (MWIR) and long wave infrared radiation (LWIR) and the reflection of visible radiation. A spatial optical modulator having a plurality of said MOEMS optical modulators (2). A method of addressing said spatial optical modulator.

摘要翻译： 一种具有电可调谐光学谐振器的微光电机械系统（MOEMS）电光调制器（2），所述电可调谐光学谐振器包括具有相对于基板（13）弹性偏置的反射镜（10）的不对称法布里 - 珀罗标准具， 响应于施加于其间的电压而与其关联。 光调制器（2）能够调制具有多个波长的电磁辐射。 调制器适用于调制短波红外辐射（SWIR），中波红外辐射（MWIR）和长波红外辐射（LWIR）的传输以及可见辐射的反射。 一种具有多个所述MOEMS光调制器（2）的空间光调制器。 一种寻址所述空间光调制器的方法。