Large-field-of-view regional multi-level detection infrared imaging system based on spherical lens
An infrared imaging system and a large field of view technology, applied in the field of optical imaging, can solve problems such as uneven illumination of the image plane, high probability of missed detection, and large geometric distortion of the image
Inactive Publication Date: 2019-11-05
XIDIAN UNIV
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[0003] At present, scanning-based infrared imaging warning equipment has been widely used, which can realize the search and positioning of object objects to a certain extent, but the current scanning infrared imaging warning equipment has complex scanning mechanism, long field of view scanning time and Due to defects such as high probability of missed detection, staring imaging technology is gradually applied to infrared imaging warning equipment. In order to make up for the shortcomings of large field of view search caused by canceling the scanning mechanism, it is usually realized by panoramic fisheye lens imaging. The application of large field of view imaging and zoom structure also realizes the ability of integrated detection of large field of view wide area target search and small field of view target precise identification
[0004] However, the staring imaging method based on the panoramic fisheye lens still has the disadvantages of large geometric distortion of the acquired image, uneven illumination of the image surface, and difficulty in effectively realizing high-resolution detection with a large imaging range.
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[0037] At present, infrared imaging alarm equipment based on scanning is still widely used. Such as figure 1 As shown, the scanning infrared imaging warning equipment usually uses a line array or area array infrared detector to scan the object space to achieve large field of view imaging. When the system detects the target, the electrical signal processing module can locate it. At the same time, the target is imaged through the display. This imaging method can achieve a large-scale search and positioning of the target on the object side to a certain extent. However, the current scanning infrared imaging alarm equipment has complex scanning mechanisms, long field of view scanning time, and Insufficiencies such as a high missed detection rate have limited its practical application.
[0038] Such as figure 2 As shown, the staring imaging equipment developed to solve the above-mentioned problems existing in the scanning infrared imaging warning equipment realizes the imaging of...
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The invention discloses a large-field-of-view regional multi-level detection infrared imaging system based on a spherical lens. The system is characterized by comprising the homocentric spherical lens(10) and a camera array (20), wherein the camera array (20) comprises a plurality of cameras (201) which are arranged in X rows and Y columns, and all the cameras (201) are arranged in a spherical structure; the homocentric spherical lens (10) is used for collecting infrared radiation energy of a scene to form a primary curved image plane; and the camera array (20) is used for segmenting the primary curved image plane, performing relay imaging on the segmented primary curved image plane and obtaining a full-field-of-view image through image stitching processing. Through the infrared imaging system, the defects of structural complexity and poor imaging quality of gaze-type infrared imaging alarm equipment during large-field-of-view wide-area target search and small-field-of-view high-precision target recognition and tracking are effectively relieved.
Description
technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to a ball-lens-based large field of view sub-area multi-stage detection infrared imaging system. Background technique [0002] With the continuous development of infrared imaging warning equipment, people have put forward higher requirements for the multi-level detection technology of large field of view wide-area target search and small field of view high-precision target recognition and tracking. [0003] At present, scanning-based infrared imaging warning equipment has been widely used, which can realize the search and positioning of object objects to a certain extent, but the current scanning infrared imaging warning equipment has complex scanning mechanism, long field of view scanning time and Due to defects such as high probability of missed detection, staring imaging technology is gradually applied to infrared imaging warning equipment. In order to make up...
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IPC IPC(8): G02B13/06G02B13/14G03B37/00H04N5/225H04N5/247H04N5/33H04N23/90
CPCG02B13/06G02B13/14G03B37/00H04N5/33H04N23/55H04N23/90
Inventor 刘飞邵晓鹏刘佳维冯位欣段景博杨思源
Owner XIDIAN UNIV