DE1279342B - Reseau arrangement in row measuring chambers - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN ^ TC ^ PATENT OFFICE Int. CL:

GOIc

EDITORIAL

G03b

German class: 42 c - 10/01

Number: 1279 342

File number: P 12 79 342.9-52 (Z 10965)

Filing date: July 11, 1964

Open date: October 3, 1968

The invention relates to a reseau arrangement in series measuring chambers for detecting image deformations of the developed recording material with a precisely divided line grid (Reseau), which is exposed on the recording material together with the image of the subject and is thus superimposed on the entire image area.

With such arrangements, the positional errors of neighboring recording points that occur due to a distortion of the recording material over the entire recording surface can be determined exactly from the difference between the actual positions of the reseau crosses measured on the recording compared to the target positions specified on the resea plate and attached,
Speaking correction values when evaluating the

It is known in photogrammetric recording devices, with the aid of a front of the recording material introduced crosshairs or a reticle the optical axis of the measuring chamber or the center of the picture window mark on the recording material.

It is also known in such point marking systems, the reticle in individual To dissolve character carriers, these in the picture window opening or its immediate vicinity a small air gap in front of the recording material.

The point of intersection of these edge markings then in turn defines the center of the picture window opening.

For the exact detection of deformations of the recording material, which extends over the entire Receiving area extends with different and irregular amounts, these are known Facilities not suitable.

In contrast, it is the task of a reseau to basically make all image deformations detectable do. Essentially, these are real deformations or unevenness of the recording material. These influences can no longer be separated from one another in the end result. The Reseau should capture them together and theirs Show influence.

If marks distributed over a large area are attached at a distance in front of the recording material, so occur with a common image through a projection lens central perspective deformation of the brand images compared to the original. These deformations were previously in the Photogrammetric not considered acceptable in a reseau arrangement.

Reseau arrangement in row measuring chambers

Applicant:

Carl Zeiss, 7920 Heidenheim

Named as inventor:

Dr.-Ing. Hans-Karsten Meier, 7080 Aalen

With all previously known photogrammetric devices with a reseau arrangement Therefore, distances between the reseau marks and the image capture level were meticulously avoided and Even in chambers with a vacuum suction plate, the recording film is sucked backwards against the plate, both, however, brought into closest contact with the reseau during the exposure.

Recordings in which this contact did not take place were usually referred to as so-called Discarded with investment errors.

The present invention now breaks with that

«5 above prejudice of the professional world by adding in arrangements of the type described above, the Reseau at a distance in the range of the depth of field Recording optics is arranged on the recording side in front of the recording material and there also during the Exposure remains.

This has the advantage over the known arrangements of this type that once the Recording material is largely spared and no electrostatic flashes during transport of the recording material can occur as a result of the friction on the resea plate and on the other hand Here too, perspective deformations caused, for example, by the distance and any inclined position of the recording plane can easily be eliminated.

In the exemplary embodiment shown schematically in the drawing (section perpendicular to the image plane of the chamber), a film 1 itself, as is customary in normal series measuring chambers, is drawn by means of suction through channels 2 to a pressure plate 3 and, together with this, applied to a so-called feed frame 4. A reseau 5, the grid crosses 5 'of which face the light-sensitive layer 1' of the film, is at a fixed distance A c, the size of which is in the range of the depth of field of the imaging optics, which is symbolized here by the projection center 6, in the optics frame 6 ' -

809 619/100

arranges. The chamber constant c ' is usually given as the distance between the film plane I and the projection center 6, but in the present case as the distances between the reseau plane V and the projection center 6. Together with the target positions of the reseau crosses in the reseau plane, the image-side beam can be restored without a doubt. The projective distortion occurring as a result of the distance Ac of the Reseau plane V from the image plane I (film plane) is automatically taken into account with the other changes in scale when evaluating the measurement image.

Claims (1)

Claim: Reseau arrangement in row chambers for the detection of image deformations of the developed recording material with a precisely divided line grid (Reseau), which is exposed together with the image of the recording object on the recording material and thus superimposed on the entire image area; 'dajdureh that the reseau ¹ (5) is arranged at a distance (Ac) in the area of the depth of field of the recording optics on the recording side in front of the recording material and remains there during the exposure. Considered publications:
German utility model No. 1828 847;
French Patent No. 490 725;
A. Buchholz, "Photpgrammetrie", Berlin, 1954,. 109. 1 sheet of drawings 809 619/100 9.68 © Bundesdruckerei Berlin