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Long wave infrared optical system

An optical system, long-wave infrared technology, applied in the field of long-wave infrared optical system, can solve the problems of complex optical structure, low imaging resolution, high cost, etc., achieve good application effect, reduce cost, and reduce processing cost

Active Publication Date: 2013-04-03
NINGBO SUNNY INFRARED TECH COMPANY
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Problems solved by technology

[0004] For the traditional long-wave infrared wide-angle lens, there are problems such as complex optical structure, low imaging resolution and high cost

Method used

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Embodiment Construction

[0040] figure 1 It is a structural schematic diagram of the long-wave infrared optical system described in the present invention.

[0041] As shown in the figure, the long-wave infrared optical system is sequentially arranged along the optical axis from the object side to the image side: a system diaphragm St, a first lens L1 with positive refractive power, a second lens L2 with positive refractive power, and an imaging surface 100. The incident light enters from the first lens L1 through the system diaphragm St, passes through the convergence of the first lens L1 and the second lens L2, and finally enters the imaging surface 100 .

[0042] Wherein, in the infrared optical system, the first lens L1 is a positive meniscus lens with a concave surface facing the object side; the second lens L2 is a positive meniscus lens with a convex surface facing the object side. Both the concave surfaces R1 and R2 of the first lens L1 are aspheric surfaces, the convex surface R3 of the seco...

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Abstract

The invention provides a long wave infrared optical system. A first lens and a second lens are sequentially disposed along an optical axis from an object space to an image space. The first lens is a meniscus lens with a concave face facing an object and forward refractive power. The second lens is a meniscus lens with a convex face facing an object and forward refractive power. The long wave infrared optical system satisfies the following formula: -2<f*(n-1) / (FNO*R1)<-0.5, wherein f is focal length of the whole optical system, n is central wavelength refractive index, FNO is F number of the optical system, and R1 is concave face approximate curvature radius of the first lens. The long wave infrared optical system is compact in structure, lowers machining cost, allows system assembling to be simpler, realizes batch production, and has fine application effects.

Description

technical field [0001] The invention relates to a long-wave infrared optical system, in particular to a novel low-cost and high-resolution long-wave infrared wide-angle lens suitable for the field of security monitoring. Background technique [0002] At present, the long-wave infrared uncooled detector technology is becoming more and more mature. The uncooled detector has the characteristics of compact structure, low power consumption, and low cost. It can be widely used in forest fire prevention, road monitoring, airport monitoring and other security fields. The number of pixels of the current uncooled detector has gradually transitioned from 160×120, 320×240 to 640×480, and the pixel size specification has also transitioned from 25 microns to 17 microns, especially in high-end applications, 300,000-pixel Thermal imagers have begun to spread. [0003] In the existing disclosed technology, the long-wave infrared wide-angle lens may adopt a single lens solution, but there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18G02B13/06G02B1/00G01J5/02
Inventor 任和齐朱春光
Owner NINGBO SUNNY INFRARED TECH COMPANY
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