SU63201A1 - Photographic scale making device - Google Patents

Description

To make the scales photographically, the scale is usually drawn on some scale on paper, and then photographed with a diminished photograph on the corresponding photoplates, thus obtaining a working negative, from which contact copies copied by the photosensitive layer produce the necessary number of photographic photos. scales In the form of an exception, a semi-photographic method of making scales was used, in which the negative is made by engraving on a silver or lead layer deposited on glass. However, the first method can produce exact scales of only small and medium sizes, while the second method, although it makes it possible to produce scales of arbitrarily large sizes, but is associated with additional processes that require a lot of time and cost: glasses for negatives need good and skillfully selecting, and after applying strokes with the aid of a dividing machine, transfer the negative to a pantograph for the production of digital inscriptions and other symbols; or all

Additions, except for strokes, should be made on paper, from which then a negative can be made to copy inscriptions into positives, obtained by copying from negatives without inscriptions.

However, it is also possible to make a large accurate scale in a photographic way, if you apply a projector projecting an image of a w, ate on a photosensitive layer of a plate, which can be moved at specified intervals.

The subject matter of the invention is an instrument that solves the above problem. For the convenience of digitizing and writing on the plate during one operation, for example, simultaneously with applying scale marks, the instrument projector has two channels: one to project the image of a click, and anamorphic optics, and the second to project the image of the digitizing templates, labels and t. p., having a spherical optics.

A cassette with a plate covered with a photosensitive layer is mounted on a movable carriage, on which the reference scale is also located. A reference microscope is located above the reference scale, and a micro projector is above the plate.

For this purpose, it is rational to use a collimator with a reference scale and fixed microscopes: one above the reference scale and the second above the commanding scale, with the microscope replaced with a photosensitive plate in the latter microscope to transform such a comparator into the described device.

FIG. 1 is given an exemplary form of the projector's projection, on the fng. 2 - the lens of the projector, in FIG. 3 and 4 are exemplary views of the adjustable slits of the microprojector; FIG. 5 - View template with digitization.

The plate coated with the appropriate photosensitive layer, on which the scale should be prepared, is fixed with a layer upwards under the light-tight cap at the end of the carriage. The microprojector is focused on the layer of the workpiece by an autocollimation method using an autocollimation ocular; in this case, the slit: C - D (Fig. 4), illuminated with a light bulb / through condenser 2, is sharply depicted on the surface of the photosensitive layer through a complex cylindrical lens (Fig. 2) in the form of a uniformly illuminated line, the width of which is set by measuring screw 4 and the length is specified by slit 4-B (Fig. 3) controlled by screw 5. For digital inscriptions on the strokes in the plane of the slit C-D, a template with stencils is installed (Fig. 5), which are projected onto the layer with the help of micro-lens 7. After production

exposure to photograph the slit and the corresponding stencil (if an inscription is needed on the dash), the carriage is moved by a predetermined distance between adjacent dashes, which is measured by comparing on an exact reference scale using a microscope, and the dash length, if it should be different from the one just recorded stroke, is taken by installing screw 5 on the corresponding division. Thanks to the collector 6, which illuminates the slit L - B, the image of the slit C - D on the photo layer is always obtained uniformly lit over the entire length of the stroke. When working on the color sensitive layer, a selective filter is placed in front of the slit C - D.

Subject invention

Claims (2)

1. A device for making scales by photographic means, equipped with an upOEiKTfOipOM image of the slit and a cassette for covering the photosensitive layer of the plate interconnected during the application of the scale at predetermined intervals , equipped with anamorphic optics, and a second channel for projection onto the image plate of digitizing stencils, inscriptions, etc., equipped with spherical optics. 2. The form of the instrument according to claim 1 is different in that the cassette with the plate is mounted on a movable carriage that carries the reference scale, and the projector is mounted above the plate fixedly and rigidly connected to the reading microscope located above the reference scale. eFig. 3 fwAS FIG. four noCS FIG. five rip patterns gi