Traditional Culture Encyclopedia - Photography major - How does an instant camera work?
How does an instant camera work?
Compared with ordinary cameras, the lens and shutter of a single-shot camera (instant camera) are no different. Its special working principle is that the body of the disposable imaging camera that holds the film is also unique. In order to transfer and crush the film pack, there is a pair of stainless steel rollers on the body, and the positive and negative film bases come from this pair of rollers. Passed under crushing.
The photosensitive material for one-time imaging is composed of two bases. The film base of the first layer is a negative film, and its surface is coated with a silver halide photosensitive agent with a high silver content and a thin coating; the film base of the second layer is a positive film, and its surface is coated with a layer of activated carbon, sulfide, rubber, etc. composed of layers.
The two layers of film base are separated by a plastic bag containing only the syrup. The slurry is prepared from developer fixer, silver halide solvent, glue, etc. After the negative film is exposed to light, the two bases are pressed through a pair of rollers at the same time, the plastic bag is squeezed, and the slurry is evenly coated on the superimposed surface of the negative film and the positive film.
A series of rapid chemical reactions will occur between the positive and negative films. In the emulsion layer of the negative film, the silver halide in the photosensitive part is reduced to generate metallic silver, which is on the negative film; the silver halide in the non-photosensitive part is dissolved by the slurry and diffuses to the receiving layer of the positive film, where it interacts with the silver sulfide and other catalysts in the receiving layer After contact, it is reduced to metallic silver, and forms the positive image that people need on the two-layer base. In this way, a photo is formed.
The imaging films currently available for development-free cameras on the market are all boxed, with 8 pictures per box. When shooting, the film box is installed at the rear of the fuselage. After shooting, first pull out the tail paper to overlap the positive and negative sides, and then pull the film out from the gap between a pair of rollers. After a few seconds, peel the positive film off the negative film and apply a layer of glazing paste to get a bright and smooth photo.
Extended information:
The deeply rooted impression of iGood Polaroid lies in its instant imaging technology. In recent years, with the emergence of digital cameras and even digital printers, Polaroids have temporarily lost their direction. However, since 2009, they have restored the traditional instant imaging camera itself, but this time it is a digital version of instant imaging.
After taking the photo, consumers can edit it through the screen of the digital camera, and then just press a button to print out a full 2 ??x 3-inch photo in less than 1 minute. color photos.
However, the iGood camera itself is not expensive, but the Zink photo paper is very expensive. According to the Polaroid Company, the iGood camera is expected to start selling in March 2009, priced at $199. As for Zink photo paper, 10 sheets are priced at $4.99. In other words, a photo costs US$0.499 (approximately NT$16.5, RMB 3.06).
In addition, Polaroid also launched an instant mobile printer. Photos on your phone can be printed instantly via Bluetooth or USB.
Polaroids have lost their way in the digital wave. Although it sells digital cameras like other manufacturers, it even sells LCD TVs across industries. However, this did not achieve sales success.
It even filed for bankruptcy protection at the end of 2008 because its parent company "Petters Group Worldwide" was under investigation for suspected fraud. Afterwards, many Polaroid fans discussed how to save their company on Facebook, and some even set up websites to support Polaroid.
Polaroid did not disappoint. It grasped the core culture of the company, created and inherited the brand image in the digital era, and once again allowed people to see how companies can regain the world's attention in recession. , and continue its value.
Because iGood has a unique appearance, it is bound to regain the original glory and glory of Polaroid among a group of digital camera manufacturers in the future.
Under the competition of digital cameras, traditional cameras began to decline a few years ago and were discontinued two years ago. The photo paper and photo developing industry has also been reshuffled as consumers can print their own photos. .
CNN reported that iGood, a company that has allowed consumers to instantly display and preserve memories of joy, anger, sorrow, and joy over the past sixty years, will cease production starting in February 2009. Signature product - Polaroid photo paper. The biggest feature of instant photo paper is that consumers can watch the photo production process from development to fixation. In the past few decades, this is an amazing technology that everyone has loved.
Although today's digital cameras can instantly see the captured images through the viewing window or display screen, in order to save them as photos, they must be printed out through a printer.
iGood instant photos were still defeated by the oncoming digital cameras and portable photo printers, and were forced into history.
In Taiwan, before the advent of digital cameras, instant cameras were a good helper in hospital delivery rooms. Because mothers wanted to keep the face of their newborns at the moment of birth, traditional cameras had to take a good roll of film. It is inconvenient to wash only a few photos. In order to let the family members waiting outside the delivery room see the photos of the baby, they will use Polaroids to take photos at any time.
In the early years, Polaroids were also used for body identification. Shi Fuyuan, the attending physician at the emergency department of a hospital, said that no matter it is a major casualty event such as an air crash or an earthquake, in order to prevent the family members from going through the bodies of the deceased one by one and avoid emotional breakdown, they always use Polaroid to take pictures of the characteristics of the bodies and let them know first. Identified by family members. Nowadays it is also replaced by digital cameras.
According to CNN reports, Los Angeles artist Daisy. At the end of last year, Willis heard that the Polaroid Company planned to discontinue the production of photo paper. Although the company promised that consumers would still be able to buy it until 2009, Daisy immediately offered to use all the money as the down payment for a car to buy the photo paper. Paper. She told CNN that she is implementing a plan to record her life every day with a Polaroid camera. If she cannot buy photo paper, the plan is bound to fail.
Polaroid, a well-known manufacturer of instant imaging cameras, has made another innovation in the digital era and announced the launch of an instant digital camera that can instantly print full-color photos. Polaroid launched this instant imaging digital camera called "iGood" at the Consumer Electronics Show in Las Vegas; Polaroid discontinued its legendary traditional instant imaging camera a year ago.
Jon Pollock, vice president and general manager of the Digital Imaging Division, said: "This is the digital version of our traditional instant camera that has been loved by consumers since the 1970s." .
The iGood instant digital camera uses Zink inkless technology to instantly print images on special photo paper embedded with heat-sensitive dyed crystals.
Before printing, photos can also be viewed on the 3-inch color LCD screen.
iGood is scheduled to go on sale in March 2009, priced at $199, and a 10-pack of Zink photo paper will cost $4.99.
Reference materials: Baidu Encyclopedia, Polaroid (camera brand)
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