调焦方式对测绘相机主点位置的影响

邵明东; 郭疆; 朱磊; 孙继明

doi:10.3788/CO.20130605.0773

Volume 6 Issue 5

Oct. 2013

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Chinese Optics > 2013 > 6(5): 773-779.

SHAO Ming-dong, GUO Jiang, ZHU Lei, SUN Ji-ming. Effects of focusing method on principal point of aerospace mapping camera[J]. Chinese Optics, 2013, 6(5): 773-779. doi: 10.3788/CO.20130605.0773

Citation:

SHAO Ming-dong, GUO Jiang, ZHU Lei, SUN Ji-ming. Effects of focusing method on principal point of aerospace mapping camera[J]. Chinese Optics, 2013, 6(5): 773-779. doi: 10.3788/CO.20130605.0773

SHAO Ming-dong, GUO Jiang, ZHU Lei, SUN Ji-ming. Effects of focusing method on principal point of aerospace mapping camera[J]. Chinese Optics, 2013, 6(5): 773-779. doi: 10.3788/CO.20130605.0773

Citation:

SHAO Ming-dong, GUO Jiang, ZHU Lei, SUN Ji-ming. Effects of focusing method on principal point of aerospace mapping camera[J]. Chinese Optics, 2013, 6(5): 773-779. doi: 10.3788/CO.20130605.0773

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Effects of focusing method on principal point of aerospace mapping camera

doi: 10.3788/CO.20130605.0773

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Received Date: 11 Jul 2013
Rev Recd Date: 16 Sep 2013
Publish Date: 10 Oct 2013

Abstract

Abstract

The focusing of a mapping camera affects its principal point, which will change the inner orientation elements and affect the mapping accuracy. Therefore, this paper analyzes in detail the effects of three usual focusing methods(lens focusing, plane mirror focusing, focal plane focusing) on the principal point position of aerospace mapping camera. First, the principles of three usual focusing methods were introduced briefly, and the effects of these focusing methods on the principal points were studied under an ideal condition. Then, through considering the assembly error, the mathematical model between the principal point offset and the focusing distance was built, and the focal plane focusing was proved to be the best focusing method through the example computation in which the positional error of principal point was less than 0.2 pixel. Finally, by taking the focusing mechanism designed for some cameras as the experiment object, the principal point changes of plane mirror focusing and focal plane focusing were measured. The results show that the computing formula proposed is accurate, and the analysis about the principal point based on different focusing methods is right. The results can be used for choosing the focusing mode of the mapping camera and can meet the needs of high precision mapping.
- mapping camera,
- focusing method,
- principal point

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References(1)

References

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