Panchromatic objective lens of aerial camera for realizing wide angle as well as long and rear operating distance

A technology of working distance and aerial survey camera, which is applied in the field of panchromatic objective lens, can solve the problems of image surface illumination uniformity, resolution influence, image splicing difference, etc., to meet the requirements of resolution and low distortion, high resolution and low Distortion requirements, the effect of solving the unevenness of the image surface illumination

Inactive Publication Date: 2013-01-09
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

They still have some shortcomings: small image size, low resolution; small field of view of objective lens, single objective lens model; differences in the exposure of various panchromatic cameras cause differences in image stitching
[0010] (2) Influence of large field of view on aberration
Therefore, for a camera with a large field of view, it is more difficult to correct aberrations, especially distortions.
[0012] (3) The effect of large field of view on the uniformity of illumination of the image plane
[0014] (4) Influence of large field of view on resolution

Method used

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  • Panchromatic objective lens of aerial camera for realizing wide angle as well as long and rear operating distance
  • Panchromatic objective lens of aerial camera for realizing wide angle as well as long and rear operating distance
  • Panchromatic objective lens of aerial camera for realizing wide angle as well as long and rear operating distance

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Embodiment Construction

[0031] The main parameters of the present invention are: wave band 480nm~700nm; image plane size 182.52mm×182.52mm, diagonal length 258.12mm; focal length f: 118.93mm; F#8; field of view ω: 94.68°; f'=1.051; lens barrel length: 336.5mm; back intercept: 125mm; first surface aperture: 215.2mm. The MTF at 55lp / mm is ≥0.363, and the off-axis image plane illumination is 43.8%; the size of the diffuse spots in each field of view is on the order of a pixel (9μm); the relative distortion is less than 0.011%, and the absolute distortion is less than 12.86μm.

[0032] Such as figure 1 As shown, in order to achieve wide angle and long working distance at the same time, the optical structure of the present invention innovatively adopts an inverse telephoto structure, that is, a structure in which negative and positive lenses are separated. The negative focal power lens group is used as the front group, and the positive refractive power lens group is used as the rear group. Because the f...

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Abstract

The invention relates to a panchromatic objective lens of an aerial camera realizing wide angle as well as long and rear operating distance. The panchromatic objective lens adopts a reverse long-distance type structure, namely, a separation structure of a negative lens and a positive lens; a negative power lens group is used as a front group; a positive power lens group is used as a rear group; the front group consists of a first lens, a second lens and a third lens that are arranged sequentially; the rear group consists of a fourth lens, a five lens, a first pair of balsaming lens, a diaphragm, a triplet lens, a second pair of balsaming lens and a convex plane lens that are arranged sequentially; and components in each group of the front group and the rear group are sequentially arrangedalong an optical axis. The panchromatic objective lens of the aerial camera simultaneously realizes big field of view, long and rear operating distance, high resolution and low distortion.

Description

technical field [0001] The invention relates to a panchromatic objective lens, in particular to a panchromatic objective lens for aerial survey cameras with wide angle and long rear working distance, which is mainly used in spliced ​​large area array digital aerial survey cameras. Background technique [0002] The current area array digital aerial survey cameras mainly include the DMC camera of Z / I company and the UltraCam X (UCX for short, which is an upgraded version of UltraCam D) digital aerial survey camera of Austria V2xcel. They still have some shortcomings: small image size, low resolution; small field of view of the objective lens, single objective lens model; differences in the exposure of various panchromatic cameras cause differences in image stitching. [0003] In order to overcome these shortcomings, a spliced ​​large area array digital aerial survey camera is designed. Its panchromatic module innovatively adopts a single objective lens, reflective quadrangula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/04G02B13/18
Inventor 蓝公仆马文礼梁伟高晓东
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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