toddler girls clothes Camera technique invention

Camera technique
A sunlight passes through the hole to shoot the dark room, may screen the outside with it relative wall the reversed image, this kind of phenomenon is called the pinhole image formation As early as Chinese Spring and Autumn Period time's ancient times scholar Mozi has discovered this phenomenon more than 2300 years ago. This becomes today the camera image formation principle foundation.
Appears most early using this principle make's camera in the Arab nation,toddler girls clothes, took at that time the astronomer to observe the celestial phenomenon one kind of tool .15 to the 16th century, this kind of camera spread Europe, and is improved unceasingly by the European. They have installed the reflector successively on the camera and substitute with the glass lens have entered the smooth hole, caused in the camera the reversed image to turn the direct positive, entered the light quantity also to obtain the enormous enhancement. At that time, the painters carried on the portrait with this kind of camera to do painting, the effect was extremely good. Viewer exterior projection which sees from the camera, regardless in the color or the shape, completely is consistent with the outdoor scene. If is not lacks the phantom which the essential technological means will observe to get down fixedly, perhaps that the photography production will shift to an earlier time several hundred year .1725 year, a Germany's dissector Schultz in the laboratory will make the extraction phosphorus when the abundance of sunshine the experiment, accidentally discovers in the flask the light part compound to turn the purple black. This change has aroused his interest, after continuing conducts the research, finally determined, the one who causes this change is the silver. His discovery, becomes the posterity to study the camera technique the foundation.
in 1802, English Weiqiwude placed the leaf and the picture on glass plate design has processed with the silver nitrate and the Dan forest on the paper to carry on direct to make public, on the paper appears the picture. But because is unable the fixation, the phantom cannot maintain.
in 1826,baby gift basket ideas, the German Nepal Pu woods with spread have the powdered asphalt and the lavender oil metal plate put in the camera, course 8 hour to make public, has obtained one, was also the world L first non-fading outdoor scene picture. But because to make public time is excessively long, the optical fiber motion change causes in the picture the object to be slurred. Afterward, the Nepali Pu woods have carried on many kind of experiments, finally had discovered plates with silver on the metal plate, then spurts the iodine again the method. He told this discovery he to reach immediately in France's colleagues the geyl. Soon, the Nepali Pu woods died, reach the geyl to continue this research. He uses the iodine vapor processing sheffield plate, then puts in it in the camera to make public, after to make public, the back water silver vapor carries on the development and with the table salt fluid fixation, obtains the picture clearly with this method stable, but permanent preserves for .1839 years, reaches the geyl to make public this method, and chooses a name as the silver board photographic method.
Meanwhile, British scientist Talbott has invented the use silver nitrate and the potassium iodide brightness photographic method. Brightness photographic method and the silver board photographic method compares, although the image formation was inferior that the silver board is clear, but the photosensitive speed is quick, the needed materials are inexpensive, moreover may use a negative to develop film many pictures, its form approaches in the modern photography.
in 1851, English Archer has also invented one kind of new camera technique. He spreads the nitrocellulose lacquers on the glass, has promoted the glass plate nitrocellulose lacquers wet plate photography law. This method has absorbed the silver board photographic method and brightness photographic method merit, not only the image formation is clear, moreover can also develop film many times, to make public time also greatly is the reduction. However, the shortcoming is the glass photographic plate must photograph the field processing manufacture, each time photographs must carry the massive things, is not very convenient. After having used period of time, then the glass plate which is invented by English Madox substitutes.


The glass dry plate's manufacture method is melts Australia the silver to dissolve in the gelatin, spreads on again the glass plate, optical is stronger as a result of the silver bromide, therefore causes the photograph the time is the reduction greatly. The beforehand silver board photographic method needs the sensitive time is above 30 minutes, brightness photographic method needs above 2 minutes, the wet plate photographic method also needs most quickly for 15 seconds, but the dull photographic method only needs for 1/16 second.
To make public speed's enhancement besides photosensitive material's improvement, photographs lens' invention and the improvement is also an important reason .1841 year, wore this Parr first to use the brightness extremely high lens .1846 years on the camera, Germany's Cull? Cai Si has set up special study micro lens and the photography lens' optics laboratory in Germany's Yena, gathered one group of opticist and the glass manufacture artisan, created many high quality high performance lens, in promoted in the world photography development process, played the great importance the role.
in 1868, the US invented the celluloid, US's Goodwyn has first used this invention to carry on photography photosensitive material the development .1877 years,（Related Articlespersonalized fleece baby blanket Shanghai each big shoe indu）, one kind made the film base by the celluloid film, above spreads has the photographic emulsion facility, might circle in rolling to partition continuously in the camera the photograph sensitive film; With the world .1884 years, US's Yisiman Factory starts the mass production celluloid roll film, and developed has used this kind of roll film the small camera .1888 years, Yisiman Kodak Corporation according to the principle which Britain physicist Maxwell discovered that spread three on the celluloid film to be able to feel red, green, the blue tricolor photosensitizers separately,infant girl dresses, has made the color film, caused the color photography to become the reality finally. Previous page 12 next page