Fig. 1. Homemade raster lamp.Psychologists have long determined that the health of a person, his emotional state during labor or active vacation influenced by the color of the surrounding objects, walls, floors. For example, a greenish tone to soothe, and, conversely, red — toned fruit. This means that changing the color of the background environment, interior, can affect the psychological state of the person, his health. But the color of the interior items — the property is fairly constant, static; to change the color scheme of the room, will have to glue the Wallpaper, repaint the furniture, change the upholstery…

However, there is a way to reconcile with the actual desired, it is only necessary to seek the assistance of… light. Want to offer a description of a simple device that allows to obtain a beam of any color and saturation and change the color scheme of the room at any time in accordance with the task or mood. The proposed scheme is quite versatile and allows you to use it as a ceiling fixture, n table lamp, floor lamp, special light source.
The principle of operation is based on partial overlap of the light flux of the usual white, skip, go through a linear raster, one or more filters. Way would seem quite well-known, widely used, e.g., for theatrical effects. In fact, there are essential differences: the use of the raster and the possibility of incomplete or mixed ceiling beam.
The design, of course, may vary in execution: device housings, support elements and methods of connecting and fixing. So focus on what’s important: the manufacture and raster filters.
Linear raster must have an even pronounced grooves, the projections and depressions forming in the orthogonal cross section of a wavy line. If you set it to a converging beam of rays, each protrusion and depression would form a miniature cylindrical lens, scattering transmitted light evenly over the entire surface. If you overlap the same raster plate Kli film filter, the luminous flux will be uniformly colored, and the saturation is proportional to the area of overlap. This should be observed one prerequisite: the border of the slab parallel to the raster lines.
Fig. 2. Schematic diagram of the raster of the lamp.
Fig. 2. Schematic diagram of the raster lamp:
1 — housing 2 — lamp. 3, 4 — lenses, 3 — slider-holder filters. 6 — filter, 7 — raster 8 — lamp holder 9 – sfericheski reflector
R and p. 3. The pattern of dispersion and coloring of the light flux
R and S. 3. The pattern of dispersion and coloring of the light flux:
1 — raster plate, 2 — plate filter, 3 — illuminated surface.

If you push on opposite sides differently colored filters, the resulting beam will get a color depending on the color of each of the filters and the area ratio of the raster plots, they overlap. For example, when the same simultaneous introduction of the red and green filters will receive the corresponding saturation blue. Using plate the primary colors of the spectrum (red, blue and yellow) or the so-called additive mixing which gives any of the others, and their ndwiga Laramie, can give ray all the colors of the rainbow.
Now about how to make this “palette” for the light. Let’s start with raster. To get it to do the matrix. Take any rigid plate of suitable size and wrap it a wire with a diameter of from 0.5 to 1.5 mm — tightly, turn to turn. This is the matrix. The very same raster is applied to the sheet of clear Plexiglas, which is first softened over an electric or gas hob (burner don’t forget to cover with a sheet of tin). Kai only it becomes plastic, place it on the matrix and covering the plexiglass smooth rigid plate (e.g., DSP), squeeze the “sandwich” with a force of 70 kg. or equal to 8 will Receive a uniform undulating surface.
Such a plate can be used as a bitmap in any lamp. Driven by the concept of it, which will allow you to collect your desired option or upgrade an existing projector, the illuminator, making it appropriate nozzle-tube.
R and with . 4. Getting raster
R and with . 4. Receiving raster:
1 — a rigid plate, 2 – wire. 3 — heated glass, 4 — plate, 5 — weight.

R and p. 5. Manufacturer filter
R and S. 5. Manufacturer filter:
1 — glass plates. 2 — drop paste, 3 — adhesive tape. 4 — cargo.

In the case (see picture) found: the spherical reflector (you can use household foil), and the cartridge lamp (conventional lighting, minion movie), two PLANO-convex lenses (say, condensor magnifier), the raster plate; on the outside, the output light flux tin fasten the slider — holder filters. Poloski can dvigatsya and before raster: effect of staining and the color distribution is retained.
On its option to verify the Schema I have used ready lens Assembly from the projector “Etude”. This required only to separate it from the body. The unit is convenient because you do not need to split hairs with the holders for the filters — you can insert them into the frame of submission of slides. Tilting petal-ohranitel on the guide, take out the personnel frame and (as an option) instead DIGEM package of raster and filters. As for the case of block Assembly I used a large tin can (from green peas of the company “globe”), taking care of ventilation.
For filters you can use any colored glass, plates painted Plexiglas, which, by the way, well painted with a diluted paste of the rods from ballpoint pens. The same paste will help to filter and glass plates (e.g., plates washed). Should only drop one of them to cover the second plate and leave them under load for a few hours, the paste will be spread in a thin film, like a colored strip. Will only turn over the resulting filter strip of masking tape.
V. GAVRILOV, engineer, Minsk

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