Abstract: A measuring field group for detecting quality data in the multicolor printing of single editions has measuring fields printed on a printed product in an optically scannable manner with at least one color-measuring surface (F) for determining a color density, a surface coverage or a tristimulus value for each of the measuring fields. To obtain register mark as well as shifting and doubling values simultaneously, the measuring fields have at least one lateral color strip (S) each, which is printed in the same print together with the color-measuring surface (F) of its measuring field, is narrow in relation to the dimensions of the color-measuring surface (F) of its measuring field, and extends at a likewise short lateral distance from the color-measuring surface (F) in relation to the dimensions of this color-measuring surface (F).

Abstract: A measuring field block for detecting quality data in the multicolor printing of single editions, which measuring fields (A1-D3) printed on a printed product in an optically scannable manner with at least one color-measuring surface (F) for determining a color density, a surface coverage or a tristimulus value for each of the measuring fields (A1-D3), is characterized in that the measuring field block has lines (L) for primary colors used in the print for the simultaneous determination of values for a register deviation.

Abstract: A group of measured fields (as well as a process for using the measured fields) is provided for determining color data of a printed product, especially for color management in the rotary offset printing of single editions, with a plurality of measured fields, which are printed on a printed product to be checked or on a primary print in such a way that they can be optically scanned. The group of measured fields includes a first combination measured field, in which the fundamental colors are superprinted with their nominal degrees of surface coverage (F.sub.c1, F.sub.m1, F.sub.y1). Additional combination measured fields are provided, in which the fundamental colors are superprinted at varied nominal degrees of surface coverage {(F.sub.c2 =F.sub.c1 +.DELTA.F.sub.c2, F.sub.m1, F.sub.y1), (F.sub.c1, F.sub.m3 =F.sub.m1 +.DELTA.F.sub.m3, F.sub.y1), (F.sub.c1, F.sub.m1, F.sub.y4 =F.sub.y1 +.DELTA.F.sub.

Abstract: A group of measured fields (as well as a process for providing them and using them) is provided for determining color data of a printed product, especially for collecting quality data in the rotary offset printing of single editions, with a plurality of measured fields, which are printed on a printed product to be checked or on a primary print in such a way that they can be optically scanned, the group of measured fields includes a superprinted, at their nominal degrees of surface coverage (F.sub.c1, F.sub.m1, F.sub.y1), first combination measured field (1), including the fundamental colors, especially the three colors cyan, magenta and yellow, and printed additional single-color half-tone fields, in the fundamental colors, wherein the single-color half-tone fields have, in their corresponding fundamental color, a degree of surface coverage F.sub.c1, F.sub.m1, F.sub.y1 that corresponds to that of the same color in the first combination measured field (1).

Abstract: A coupling mirror (13) for coupling in a laser beam (14) is located in the optical axis of a slit illumination (4,7). A pair of prisms (11) is provided between this coupling mirror 913) and the tube objective (9) of the illumination tube (1), this pair of prisms spliting the light beam of the slit illumination up into two partial beams (12) situated at the side of the coupling mirror (13). As well the slit illumination as the laser beam are focused in a place (16) in the eye by a front objective (15). This design allows the use of a conventional illumination tube which may be rotated together with the slit diaphragm (7) in order to change the direction of the slit image in the eye. For all angular positions of the slit diaphragm a good brightness of the slit illumination is hereby achieved.