A medium wave infrared lens with large field of view and large relative aperture
A relative aperture and infrared lens technology, which is applied in the fields of instruments, climate change adaptation, optics, etc., can solve the problems that the mid-wave infrared system is difficult to meet the target's large-scale and long-distance detection, and achieve improved readability and detection accuracy, low Distortion, enhance the effect of field of view
Active Publication Date: 2022-05-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing medium-wave infrared system is difficult to meet the large-scale and long-distance detection of the target, and provides a medium-wave infrared lens with a large relative aperture and a large relative aperture. Mid-Wave Infrared Optical System with Larger Field of View
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[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0027] The invention provides a medium-wave infrared optical system with a large field of view and a large relative aperture. The lens of the system adopts 4 optical lenses. Through the selection of optical materials, the distribution of optical power and the use of high-order aspheric surfaces, the main beam of off-axis beams is reduced. The incident angle of light at each lens reduces the coma, astigmatism and distortion related to the off-axis field of view of the system, so that the system field of view reaches 40°×40°, the relative aperture of the system reaches 1 / 1.05, and the total system distortion ≤5%. This des...
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Abstract
The invention provides a medium-wave infrared lens with a large field of view and a large relative aperture, which solves the problem that the existing medium-wave infrared system is difficult to meet the large-scale and long-distance detection of targets. The mid-wave infrared lens includes a lens barrel and an optical system arranged in the lens barrel. The optical system includes a first lens, a second lens, a third lens and a fourth lens arranged in sequence along the optical axis; the left side of the first lens is the object plane, and the right side of the fourth lens is the image plane; the first lens is a meniscus lens with negative refractive power bending toward the image side; the second lens is a meniscus lens with positive refractive power bending toward the object side; the third lens The meniscus lens is a meniscus lens with positive dioptric power that bends toward the object side; the fourth lens is a biconvex lens with positive dioptric power.
Description
technical field [0001] The invention relates to a medium wave infrared lens, in particular to a medium wave infrared lens with a large field of view and a large relative aperture. Background technique [0002] The infrared optical system is a kind of passive detection optical system that detects the thermal radiation energy of the target and its surrounding environment. It has broad application prospects in fields such as emergency rescue and forest fire prevention. [0003] Since the mid-wave infrared system mainly detects the energy radiated by the target itself, it can be applied in some specific scenarios, such as personnel search and rescue applications. The infrared energy radiated by the human body is weak. In order to improve the efficiency of personnel search and rescue, the infrared optical system must have higher detection capabilities, which puts forward higher requirements for the design of medium-wave infrared lenses. At present, for a specific target, improv...
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IPC IPC(8): G02B13/14G02B13/18
CPCG02B13/14G02B13/18Y02A40/28
Inventor 马迎军梅超曲锐闫阿奇张洪伟陈卫宁
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI