What is microfilm technology?

Microform technology is a modern information processing technology involving multi-disciplines, multi-departments, strong comprehensiveness and mature technology. Originated from 1838, a British photographer, Dan Sai, first photographed a 20-inch document into 1/8-inch microfilm through a microscope, which has been developed for hundreds of years. It uses special equipment, materials and technology to record the original information on the photosensitive material (usually film) in the form of restored images, and then process it into microfilm for preservation, dissemination and use.

At present, with the development of science and technology, financial system, health system, insurance system and industrial system all use microform technology to copy paper documents, which has changed the traditional management mode in the past, improved the management level of archives and documents and improved economic benefits.

Characteristics of microscopic imaging technology

1, high storage density, mature technology and high stability.

Microfilm technology is an "ancient technology" with a history of more than 100 years, and its record carrier and equipment are completely mature and stable. The reduced image of the original is recorded on microfilm by photography. Generally, the reduction ratio is 65,438+0/7 to 65,438+0/48, and the ultra-high reduction ratio is 65,438+0/90 to 65,438+0/250. The reduced image with ordinary reduction ratio is 1/49- 1/2 304 of the original area, and the reduced image with ultra-high reduction ratio is1/8100-1/62500 of the original area. The storage density of microforms is similar to that of current optical discs. A warehouse file with tens of thousands of volumes can be saved only by one or two filing cabinets after microfilming.

2. Good recording effect and long service life.

History has proved that microfilm can be preserved for nearly a hundred years, and now the life of polyester film can exceed 500 years. Even if the film is damaged in use, such as scratching and breaking, only a limited number of frames are lost, and most of the information is not affected. This is irreplaceable by modern digital products. When shooting documents, books and materials with microfilm technology, the original appearance of the original shape, content, format, font and graphics can be faithfully recorded on microfilm, forming a reduced image exactly the same as the original. Microform technology has complete international and domestic standards, which can not only ensure the processing quality, but also bring convenience to its wide application.

3, the application range is wide

Microfilm is an information carrier that records the information on the original on microfilm through photography. Because camera lens and microfilm have good imaging and recording performance, all kinds of readable originals (words, photos and charts, etc. ) can be recorded on microfilm under visible light.

4, easy to restore copy and multifunctional use.

Images on microfilm are easy to copy, enlarge and copy. It takes only ten minutes to copy a film with an efficient copier, and only a few seconds to enlarge and copy a paper print with a reading copier, and it can continuously enlarge and copy multiple copies; Film can also be scanned and processed into optical discs, which can be combined with modern technology to form a compatible and coexisting medium. It has the functions of access, storage, networking, reading, retrieval, utilization and transmission, and meets the needs of readers and users in many aspects.

5, the role of legal documents

Micro-analog images have high fidelity and are difficult to change. Therefore, many countries (including China) stipulate that microfilms shot according to certain standards have the function of legal documents. 1990165438+10, the national archives bureau issued the measures for the implementation of the archives law of People's Republic of China (PRC), in which article 2 1 stipulates: "The archives provided by archives at all levels and of all types should be replaced by microfilm gradually, which has the same effect as the original archives." This provides a legal basis for the regeneration and protection of the original files.