When does the camera appear?

1874, Jules Jean Sang of France invented the camera.

He wound the photosensitive film on a toothed film supply reel. Under the control of the pendulum mechanism, the film supply tray moves intermittently in the circular film supply box, and the pendulum mechanism drives the shutter to rotate. Every time the film stops, the shutter will open for exposure. Janssen connected this camera to a telescope, which can take a set of photos of planetary motion at the speed of one per second. Janssen named it a photographic gun, which is the originator of modern movie camera +Y6R. `

There are many kinds of cameras, waterproof digital cameras and video cameras, and their basic principles are the same: converting optical image signals into electrical signals for storage or transmission. When we shoot an object, the light reflected by the object is collected by the camera lens and focused on the light receiving surface of the camera device (such as the target surface of the camera tube), and then the light is converted into electric energy by the camera device, and a "video signal" is obtained. The photoelectric signal is very weak, so it needs to be amplified by pre-amplifier circuit and then processed and adjusted by various circuits. The final standard signal can be sent to video recorders and other recording media for recording, or spread through a propagation system, or sent to a monitor for display.

When did the camera appear?

1725 Discovery of German photosensitive materials

1802 British projection sensitive material, the embryonic form of photography.

In the history of photography in the world, the first picture that can be imaged by photography was made in the laboratory by Niepce, a French inventor of photography and printing (1765- 1833).

In the world photography history, the most brilliant day was in A.D. 1839, when the French painter Daguerre (1789- 185 1) invented the "silver plate photography technology" and officially came out. He once held a painting and landscape exhibition in Paris, France on 1822. He used all kinds of light changes to illuminate the picture, which produced unexpected and wonderful effects and was famous. /kloc-in 0/829, he happened to meet an elderly Nipps while buying lenses from a Paris lens dealer. Because of their common consciousness, they developed photography and photography technology together. Nipps died three years later, and he continued his experiment.

Finally, he announced his great invention in the French society of science on 1839 65438+ 10. The first successful photographic invention in human history was named "Daguerre Photography".

He exposed a copper plate coated with silver iodide, and then smoked it with mercury vapor to form a silver iodide film as a photosensitive surface. In the self-made camera, the invented photosensitive plate is exposed by projecting light and shadow through the lens, and then the image is developed with mercury vapor in a designed mercury developing box, and then fixed in salt water (which later became baking soda). A permanent image photo can be formed.

1839, Daguerre made the first practical silver camera, which consisted of two wooden cases. One wooden box is inserted into another to focus, and the lens cover is used as a shutter. Only by controlling the exposure time for 30 minutes can a clear image be taken.

184 1 year, optician Vogeland invented the first all-metal camera. The camera is equipped with the world's first photographic lens with the maximum phase aperture of 1: 3.4 designed by mathematical calculation.

The camera is made by 1839.

The French Daguerre made the first practical silver camera, which consisted of two wooden cases. Insert a wooden box into another box to focus, use the lens cover as the shutter, and control the exposure time for up to 30 minutes, so that a clear image can be taken.

The camera was first formed in the15th century, as an auxiliary tool for artists to draw. By 1550, cardano of Italy put the lenticular lens in the pinhole position of the camera, and the imaging effect was brighter and clearer than that of the camera.

The origin of the camera principle is earlier, about 24500 years ago.

China scholar-Mo Zhai (Mozi) and his students did the world's first pinhole inverted image experiment, explained the reason of pinhole inverted image, and pointed out the essence of light straight line. This is the first scientific explanation for the straight-line propagation of light.

Extended data:

The history of camera development;

The earliest camera structure was very simple, including only a black box, a lens and photosensitive materials. Modern cameras are complex, including lens, aperture, shutter, ranging, framing, photometry, film transmission, counting, self-timer, focusing, zooming and other systems. Modern camera is a complex product integrating optics, precision machinery, electronic technology and chemistry.

1550, Italian cardano put the lenticular lens in the original pinhole position, and the image effect is brighter and clearer than the black box.

1558, the Italian Barbaro added an aperture to the device in cardano, which greatly improved the imaging clarity. 1665, John Zhang, a German monk, designed and made a small portable single-lens reflex camera box, which could only be used for painting because there was no photosensitive material at that time.

1822, a Frenchman, Niepce, made the world's first photo on a photosensitive material, but the image was not clear and required eight hours of exposure. In 1826, he took a photo through a black box on the tin floor coated with photosensitive asphalt.

1839, Frenchman Daguerre made the first practical silver camera, which consisted of two wooden cases. One wooden box is inserted into another to focus, and the lens cover is used as a shutter to control the exposure time for up to 30 minutes, so that a clear image can be taken.

Baidu encyclopedia-camera

When did the camera appear?

1874 cameras began to appear.

The camera was independently invented by Baird, Philo farnsworth and Vladimir Zvorijin. From the 1980s, when foreign analog monitoring products entered the Chinese mainland market, foreign brands and products almost dominated the world in 20 years. Although some national enterprises have participated in the competition in this industry, they have never had the opportunity to form the mainstream of national brands.

With the rapid development of digital technology, the security field has been fully digitized. Since 2000, the digital security market has developed rapidly, and a number of emerging manufacturers of digital monitoring products have emerged in China, among which DVR manufacturers represented by digital security products have risen rapidly. In just a few years, digital monitoring technology has been applied to all walks of life.

It has made positive contributions to social stability and unity, and at the same time, it has made fundamental changes in the original monitoring market. Analog monitoring products have gradually withdrawn from the market, DVR has been widely used as the main component of digital security engineering, and national brand products have gradually occupied the main market share.

When was the camera invented?

Category: electronic digital

Analysis:

An opaque box. This is a camera. A camera is a photographic equipment that uses photographic film to shoot a scene. Its invention took a long time.

China has a long history in studying light and images. As early as more than 400 years BC, China's book Mo Jing recorded in detail the straight-line advance of light, the reflection of light and the imaging phenomena of plane mirror, concave mirror and convex mirror. In the Song Dynasty, Shen Kuo's Meng Qian Bi Tan (103 1 to 1095) also described the principle of pinhole imaging box in detail.

/kloc-During the Renaissance in the 6th century, an "imaging camera box" for painting appeared in Europe.

1839 On August 9th, the French painter Daguerre announced his invention of silver plate photography, which gave birth to the world's first portable wooden box camera.

184 1 year, optician Vogeland invented the first all-metal camera. The camera is equipped with the world's first photographic lens with the maximum phase aperture of 1: 3.4 designed by mathematical calculation.

1845, German von Martens invented the world's first 150 turning point. 1849, Davie-Blue Scott invented a stereo camera and a two-lens stereo observation mirror. 186 1 year, physicist Maxwell invented the world's first color photo.

1866, German chemist Short and optical scientist Arjun invented barium crown optical glass in Zeiss Company and produced positive photographic lens, which made the design and manufacture of photographic lens develop rapidly. 1888 Kodak company produced a new type of photosensitive material-soft and windable "film". This is a leap in photosensitive materials. In the same year, Kodak invented the world's first portable square box camera with film.

1906 American George hillas used the flashlight for the first time. 19 13 german oskar barnack developed the world's first 135 camera.

From 1839 to 1924, in the first stage of the development of this camera, some novel cameras such as buttons and pistols also appeared.

From 1925 to 1938 is the second stage of camera development. During this period, German companies such as Leeds, Lorelei and Zeiss developed and produced dual-lens and single-lens reflex cameras with small volume and aluminum alloy body.

At this stage, the performance of camera is gradually improved and perfected, optical viewfinder, rangefinder and camera are widely used, and the adjustment range of mechanical shutter is constantly expanding. The camera manufacturing industry began to produce cameras on a large scale, and camera manufacturers all over the world copied Leica and Lorelei cameras. The sensitivity, resolution and tolerance of black and white photographic film are constantly improving; The popularization of color photographic film has made the photographic team expand rapidly and move towards specialization.

After 1939, it is the third stage of camera development. In the first half of this stage, that is, before the 1960s, the quality of black-and-white and color films was further improved, and the optical industry produced new optical glasses containing rare elements such as lanthanum, titanium and cadmium. So as to better correct the aberration of the photographic lens, and the lens develops rapidly in the direction of large aperture and various focal lengths. So there are many kinds of photographic lenses, such as zoom, emblem distance, catadioptric and wide angle. Single-layer coating of lenses has been widely used. There are some structures in the camera, such as automatic reset of counter, automatic reset of mirror, semi-automatic and full-automatic contraction of aperture. The quality and output of cameras began to develop rapidly.

From the early 1960 s to the present, it is the late stage of the third stage. During this period, Liu Xiaoxi Photography Company produced the world's first self-sustaining focusing camera-Konica C35A camera 135. Then Japan produced the world's first double-priority automatic exposure camera-Minolta XDG camera 135 single-lens reflex camera. There is a precedent that a camera has multiple exposure functions.

During this period, the theory of optical transfer function entered the field of optical design, and a photographic lens with high imaging quality, good color reproduction, large aperture and small distortion appeared. At the same time, the lenses have also developed into a series, from fisheye lenses with a focal length of several millimeters to super telephoto lenses with a focal length of 2 meters, as well as photographic lenses such as angle adjustment, zoom badge distance and night vision. Electronic technology has gradually penetrated into the camera, and various photometry, high-precision electronic mirror shutter, electronic focal plane shutter and easy-to-control electronic cameras have appeared one after another. Exposure compensation, memory storage, multiple recording functions, electric winding, autofocus and other functions are applied more and more beautifully, and the degree of automation, miniaturization and portability have reached an unprecedented height. With the development of high technology, a variety of new cameras for quality evaluation are constantly coming out, thus providing excellent equipment for the creation of photographic art.