| 摘要 |
The invention relates to photogrammetric means, and its aim is to expand the possibilities of taking devices. It is the object of the invention to develop a method for distortion measurement in the image field of a photographic camera, which enables photographic cameras to be tested without the use of marking points of a calibration grid. In the method according to the invention, a diffusely scattering plate (8) is arranged in the plane of a focal-plane frame (6), a marking point (7) which coincides with the plane of the focal-plane frame (6) is faded in at an arbitrarily chosen point of the image field with the aid of the first collimator (4), and an image of the marking point (7) is generated in the image field with the aid of a second collimator (2) whose read-off axes are oriented along the fundamental coordinate axes, whereupon the marking point (7) and then its image are displaced over the whole image along an arbitrarily chosen line (9) and along another line (9), situated parallel to the first, the angular position of the beam directed onto the marking point (7) through the lens (1) as well as onto the image of the marking point (7) being measured, and the results of all the angular measurements carried out being used to calculate the distortion on the image field of the photographic camera on axes of the fundamental coordinate system. The invention can be used for optical testing of image-recording devices. <IMAGE>
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