Slide lights

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A film recorders (Engl. Movie recorder) is a device equipped with a printer driver features, photos and other documents from your computer directly to a slide (even or negative ) illuminate can.

Working principle

A highly linear cathode ray tube (Braun's tube) is used for this. Since this cannot emit colored light , three color filters in the colors red , green and blue are inserted. So there are three exposures in succession.

The file to be output must therefore also be available in RGB format or be generated by the program during the printing process.

In terms of output quality, a distinction is made between image resolution and format . The resolution in pixels always relates to the total area of ​​the format. The larger the format, the coarser the pixels with the same image resolution and vice versa.

The film lies in a camera or camera box that is screwed onto the slide recorder and remotely controlled by the recorder and is developed as normal .

resolution

The following resolutions are common:

  • 2K (2048 × 1366 pixels) - Any slide recorder can.
  • 4K (4096 × 2732 pixels) - Corresponds to normal film quality on 35 mm format and can be used by any modern slide recorder.
  • 8K (8192 × 5464 pixels) - Can only slide recorders that can also be adjusted to larger formats.
  • 16K (16384 × 12288 pixels) - Only with high-performance imagesetters for larger image formats.

Formats

Small image (24 × 36 mm) is usually used as the output format. These imagesetters usually have a maximum resolution of 4K. Professional imagesetters can also connect Polaroid cameras, 6 × 6 , medium format and large format up to 18 × 24 cm instead of a 35mm camera . Only then do the high resolutions (which always refer to the entire output format) come into play.

Fully automatic imagesetters also allow the connection of goods by the meter (up to 100 m) or the exposure to cinema film for the production of animated films .

connection

The imagesetter is usually connected to the computer with SCSI , but also with GPIB or a normal printer interface.

outlook

There were several companies that manufacture imagesetters, including a. Polaroid , Agfa , Lasergraphics and others.

Slide recorders are no longer manufactured as analog film is disappearing more and more from the market .

Due to the limited lifespan of cathode ray tubes, electron beam slide recorders will soon be a thing of history, whereas laser recorders for analog film material including slides will continue to be usable due to the practically unlimited availability of RGB lasers.

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