DE957720C

DE957720C - Color filter arrangement for color filtering in copiers or enlargers

Info

Publication number: DE957720C
Application number: DENDAT957720D
Authority: DE
Inventors: Brixen Gilbert Durst (Italien)
Original assignee: Durst A.G. Fabrik Phototechnischer Apparate, Bozen (Italien)
Publication date: 1957-01-17

Description

Filteranordnung für Farbfilterung bei Ko·- pier- ader Vergrößerungsapparaten, dadurch gekennzeichnet, daß die Filter trapezförmig zusiammengehalten sind, derart, daß sie einen Scheiben- oder Zylinderring bilden.Filter arrangement for color filtering in copier adder enlargers, thereby characterized in that the filters are held together in a trapezoidal shape so that they have a Form a disc or cylinder ring.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

PATENT CLAIM:

Considered publications:
German Patent Nos. 634494, 642091, 686165;

U.S. Patent No. 2,285,262.

this will filter 20%. The filtered luminous flux now passes through the next series of filters of color C _1, which in turn has, for example, only turned the first, i.e., 10 ° / V filter halfway into the beam path.

This filters the luminous flux of this color 5% because the filter is only half used. The third disc is color c. Any filtering can be achieved by rotating the discs as desired. The bundles of rays of different strengths are mixed by a transparent mixing body e , so that they emerge at the opening a ″, evenly distributed among one another, in order to pass the negative.

Fig. 2 shows the arrangement of the filters for one color. Only a filter disc is drawn. Of course, three must be arranged from each other. The springs m show how the filters b _{1 are} constantly clamped together under pressure. In the open air, a band wrapped around all filters is sufficient, which holds the individual filters together with their wedge shape, as in the construction of wall arches (vault-like),

A wreath placed around the filter is also sufficient, so that no central axis or the; Stops n are necessary because the rotation or storage can take place on the outside. The filters can also be arranged in the manner of a cylinder (not shown here).