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An infrared continuous zoom optical system with long focal length and large target surface

An optical system and large target surface technology, applied in optics, optical components, instruments, etc., can solve the problems of no telephoto continuous zoom optical system, and achieve the effects of avoiding system complexity, smooth and continuous zoom curve, and reducing system weight

Active Publication Date: 2021-10-15
凯迈(洛阳)测控有限公司
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Problems solved by technology

[0003] At present, with the continuous progress of uncooled infrared technology, uncooled infrared detectors are also developing rapidly towards high performance and low cost, mainly used to meet the needs of military equipment with high sensitivity, high resolution, high frame frequency and The need to replace some cooled detectors; domestic uncooled infrared detectors have been mass-produced as long-wave uncooled infrared detectors with a size of 1024×768 and a pixel size of 14 μm, but currently there is no domestic uncooled detector that can adapt to 1024×768 Telephoto continuous zoom optical system

Method used

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  • An infrared continuous zoom optical system with long focal length and large target surface
  • An infrared continuous zoom optical system with long focal length and large target surface
  • An infrared continuous zoom optical system with long focal length and large target surface

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specific Embodiment

[0061] The specific technical indicators realized by the system are shown in Table 1:

[0062]

[0063]

[0064] Table 1

[0065] Among them, F # (Optical system F number) The calculation formula is f / D, f is the focal length of the optical system, and D is the diameter of the entrance pupil.

[0066] The detailed data of the optical system of the present invention when the focal length is 30mm~150mm is shown in Table 2:

[0067]

[0068] Table 2

[0069] Table 2 lists the surface type, radius of curvature, thickness, caliber, and material of each lens; among them, the unit of radius of curvature, thickness, and caliber of the lens is mm, the unit of weight is g, and the radius of curvature of spherical and aspheric surfaces refers to is the radius of curvature at the intersection of the lens surface and the optical axis; wherein, the "surface serial number" in Table 2 is counted along the direction of light propagation, such as the beam incident surface of the fir...

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Abstract

An infrared continuous zoom optical system with a long focal length and a large target surface, comprising a first meniscus positive lens, a biconcave negative lens, a biconvex positive lens, a meniscus negative lens, a second meniscus positive lens, and a third meniscus Positive lenses and detectors; the above-mentioned lenses adopt a refraction-diffraction hybrid system, which reduces the number of system lenses and reduces the weight of the system through the reasonable distribution of different lens powers; the zoom curve of the system is smooth and continuous, effectively avoiding the system Stuck phenomenon occurs during the zooming process; the method of moving the third meniscus positive lens with axial fine-tuning is used to realize the image plane defocus compensation of the system in the temperature range of -40°C ~ +60°C and the distance change of the observed object. The resulting system defocus compensation ensures clear imaging of objects at different distances; the long focal length and large target surface infrared continuous zoom optical system of the present invention fills the domestic telephoto continuous zoom system adapted to 1024×768 uncooled infrared detectors Optical system blank.

Description

technical field [0001] The invention relates to the field of uncooled infrared optical systems, in particular to an uncooled infrared continuous zoom optical system with long focal length and large target surface. Background technique [0002] Uncooled infrared detectors have the advantages of low price, small size, light weight, low power consumption, and high reliability. Therefore, they are more and more widely used in military and civilian fields such as security monitoring and vehicles. [0003] At present, with the continuous progress of uncooled infrared technology, uncooled infrared detectors are also developing rapidly towards high performance and low cost, mainly used to meet the needs of military equipment with high sensitivity, high resolution, high frame frequency and The need to replace some cooled detectors; domestic uncooled infrared detectors have been mass-produced as long-wave uncooled infrared detectors with a size of 1024×768 and a pixel size of 14 μm, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173
CPCG02B15/173
Inventor 吴海清李同海王朋
Owner 凯迈(洛阳)测控有限公司
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