Small size uncooled dual-field-of-view infrared optical system

An infrared optical system, non-cooling technology, used in optics, optical components, optical radiation measurement, etc., can solve problems such as inability to use and inconvenient to use, and achieve the effect of compensating the drift of the image surface with temperature
CN104267484AActive Publication Date: 2015-01-07山东神戎电子股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
山东神戎电子股份有限公司
Publication Date
2015-01-07

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Abstract

The invention provides a small size uncooled dual-field-of-view infrared optical system which comprises a first positive meniscus lens and a detector. A biconcave lens, a second positive meniscus lens, a negative meniscus lens and a third positive meniscus lens are sequentially arranged from the first positive meniscus lens to the detector along the optical axis; the first positive meniscus lens, the second positive meniscus lens and the third positive meniscus lens each have positive diopter, and the biconcave lens and the negative meniscus lens each have negative diopter. Both the curved surface S3 of the biconcave lens and the curved surface S7 of the negative meniscus lens are aspheric surfaces, and the aspheric surface S7 is further provided with a binary diffraction surface. The lenses of different types are reasonably arranged and the positive diopter and the negative diopter of the lenses are selected, so that the whole dual-field-of-view infrared optical system has a smaller size and a larger zooming ratio, has a larger zooming range under the switching conditions of a narrow field of view and a wide field of view, and is suitable for occasions with small size requirements for infrared optical systems.
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Description

Technical field

[0001] The present invention relates to a small-size uncooled dual-field infrared optical system, and more specifically, to a small-size non-refractory infrared optical system that can reasonably distribute positive meniscus lenses, biconcave lenses, and negative meniscus lenses and select their positive and negative refractive powers. Cooling dual-field infrared optical system. Background technique

[0002] Infrared thermal imaging system uses the principle that all objects in nature whose temperature is higher than absolute zero (-273℃) radiate infrared rays at all times, and at the same time, this infrared radiation carries the characteristic information of the object, and then through photoelectric It is a high-tech product that converts the temperature distribution image of the target object into a video image by means of conversion and electrical signal processing.

[0003] Uncooled infrared systems are currently widely used in civil security fields such as e...

Claims

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