SU96765A1 - Mirror Optical Multiplier - Google Patents

Description

One of the most labor-intensive operations in obtaining color prints on three-layer photographic paper is the selection of corrective light filters. Selection is not (my own combination of corrective light filters can be affected in several ways.

The most popular method of color matching is printing of a number of positive samples. This method is very laborious and requires the expenditure of considerable time and photographic materials.

The weighty multiplier, consisting of many Independent lenses and light sources, is in fact a block of twenty five cameras, which makes it complex from the constructive side. In addition, the use of various light sources, as well as the use of various lenses in the manufacture of a nrob and in printing, can adversely affect the results of work.

There is a method of color grading using mosaic filters without a cartoon camera has significant drawbacks, one of which

is that the plot important part of the frame may be outside the square, having an optimal combination of light filters. The second significant disadvantage of this method is that the images in the various squares turn out to be unequal in density due to the difference in the density of light, and the same shutter speed for all.

The proposed mirror multiplier, made in the form of a tube made up of four mirror strips folded at right angles to the inside with reflective surfaces and placed in a beam between the negative and the lens magnification.: Greatly simplifies this time-consuming operation and makes it easier to determine the exposure time for printing.

The mirror multipicker has a simple design and is easily companied with a standard U-2 photographic enlarger. The use of the same light source, as well as the use of the FED lens both in the production of samples and in printing, makes it possible to most accurately select the optical jibi-iyio ivOM 61.

In the drawing. shows the proposed mirror image,.: 1 clicker in the river, 1b (1st section and n {) i. 5 A cut-away on the line. -A, a view along arrow L and a mosaic light.

Mirrors 1, 1H1r -1 has a metal housing / e with two threads - upper for screwed in1: its U-2 magnification and lower for screwing into a FED-type lens. Inside the case i there is a mirror tube. It consists of four flat mirror images with (; traction 1 O Cym. for example, aluminum OI. The mirror hair around the tube 2 is folded iodine npnMi iM by reflecting on the inside surface of the inner side. The ends, 1st window -V, closing /, protection from mirror the surface of the tube 2 from possible damage.

With 1, the multiplicator is also a descruster / dl fotobu. and mosaic light filters 5. Images in various squares, Gluchayem 1; e with noMOuibio multi, indicator, above the neon -1 in the same way.

The central image is illuminated, the extreme images are weaker. In this way, the mosaic light filter, 5, is arranged in such a way that the most .ioTiUi e combinations of the optical light are located in the center, and the less dense are along the edges. This ensures almost the same density of all twenty five prints. For a full range of twenty-five prints, a cross-shaped pattern was used and the diaphragm 6 was mounted on the non-inferior ring of the lens rim and center compensator.

De 1zhavka - / us1B. It is designed so that the central image corresponds to the price of the color square of the light filter L. The sharpness of the image is achieved by 1 turn of the ring magnifier.

D. Getting color on the print with equal color rendering) LP, OT5; following operations:

1. () Limit 1e nscho / and og | Exposures for printing and selection of light filter and d. or mosaic 10 ×) print.

2. Getting a mosaic print and choosing a combination of the adjustment of the P-ing light filters.

3. Getting about the positive with the correct color.

1. Mirrors of 1 m tic; ticato) for ghetchat color e1) heated through mosaic lights (l filters, about t and ch and y with the fact that it is made in the form of a tube, composed of n, mirror 0., folded at right angles with reflecting surfaces 1о inwards, and 1 placed in the beam with a pseudogap between the pagative and objective f {) magnifier.

2. Mirror, ogtic multi licato) i. 1, I distinguish it with the use of a cross-shaped diaphragm mounted on the J lens opening to compensate for the brightness of the central images.