Optical system of large-visual-field high-resolution three-linear-array stereo aerial surveying camera

An optical system and aerial survey camera technology, applied in the field of aerial remote sensing and surveying and mapping, can solve the problems of high technical difficulty and high usage requirements, and achieve the effect of reducing system volume and simple structure

Active Publication Date: 2014-01-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0011] At present, the three-dimensional aerial camera for linear array detectors is still blank in China. The three-line array three-dimensional aerial camera system needs a large field of view, high resolution, and high-precision optical system, which has high requirements for use and great technical difficulties. There is no such optical system in China

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  • Optical system of large-visual-field high-resolution three-linear-array stereo aerial surveying camera
  • Optical system of large-visual-field high-resolution three-linear-array stereo aerial surveying camera
  • Optical system of large-visual-field high-resolution three-linear-array stereo aerial surveying camera

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Embodiment Construction

[0046] The large-field-of-view and high-resolution three-line-array stereoscopic aerial survey camera uses aircraft pushbroom to image ground targets on the front-view, down-view, and rear-view array CCD detectors located on the image plane. The main performance indicators of the optical system of this embodiment are:

[0047] 1. The working band is 0.45μm~0.75μm

[0048] 2. The focal length of the system is 156mm

[0049] 3. The field of view of the optical system is 77°

[0050] 4. The working field of view is 60° (with the line array detector, the width direction of a single solid angle)

[0051] 5. The relative aperture is 1 / 5

[0052] 6. Detector spatial frequency 77lp / mm

[0053] 7. Distortion≤0.053%

[0054] 8. Image telecentricity ≤ 12.1°

[0055] 9. Optical transfer function MTF 0 field of view>0.62 (77lp / mm)

[0056] 0.7 field of view>0.42 (77lp / mm)

[0057] 1 field of view>0.35 (77lp / mm)

[0058] 10. Base height ratio 0.8...

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Abstract

The invention provides an optical system of a large-visual-field high-resolution three-linear-array stereo aerial surveying camera. The optical system comprises a first negative lens, a first correcting lens, a second positive lens, a second negative lens, a cemented doublet lens, a third positive lens, a diaphragm, a fourth positive lens, a cemented triple lens, a third negative lens, a fifth positive lens and a sixth positive lens. The bending direction of the first correcting lens deviates from the diaphragm, the first correcting lens is crescent-shaped, the cemented face of the cemented doublet lens deviates from the diaphragm, and the cemented triple lens is of a negative lens-positive lens-negative lens structure. The optical system of the large-visual-field high-resolution three-linear-array stereo aerial surveying camera has the advantages of being large in visual field, high in resolution, ultra-low in distortion, telecentric in accurate image space and the like.

Description

technical field [0001] The invention belongs to the technical field of aerial remote sensing and surveying and mapping, and relates to an optical system applied to a new optical load of aerial earth observation. Background technique [0002] The three-line array stereoscopic aerial survey camera is installed on the aircraft platform. Through the push-broom of the aircraft, three linear array detectors on the focal plane are used to obtain the front-view, down-view, and rear-view images of the same ground object, and finally the three-dimensional ground object is obtained by using image processing technology. digital imaging. [0003] As a hotspot in foreign research, the three-line array stereoscopic aerial survey digital camera has always attracted the attention of all parties. There are also two ways of its technical realization, namely, the single-lens internal splicing form and the three-lens external splicing form. Representatives of single-lens internal stitching tech...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/06G02B13/22G01C11/02
Inventor 闫阿奇张建周祚峰武登山冷寒冰曹剑中张凯胜
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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