Film Holder


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Film Holder

 

a lightproof device that contains photographic film or a photographic plate. Film holders (cartridges) for compact cameras consist of a cylindrical housing containing a spool, with the film wound around its core, and a cover for the housing. The film is drawn out of the holder through a slit in the housing. Such film holders are made of plastic or metal. To provide more rapid loading of the camera, special film holders are used, including the rapid (spoolless) and the Kodapak, which has both supply and take-up parts (with a spool only in the take-up part). Film holders also exist that are loaded with wide, rolled film or film units for cameras in which the photographic image is produced by the one-step (diffusion) process.

Plate holders (magazines), which are flat and rectangular, have a movable shutter (sliding plate) in front of the photosensitive layer on the plate. The housings for such film holders are made of metal, plastic, wood, or cardboard. Plate holders are either inserted into the camera’s housing or are fastened to its rear portion. They are classified as single, double, or magazine types, depending on the number of photographic plates they contain. A variety of the plate holder is the adapter, which is usually loaded with film packs.

S. V. KULAGIN

References in periodicals archive ?
Quality of bitewing radiographs in children in relation to the type of film holder used.
For craniocaudal view, the breast to be examined was firmly placed in contact with horizontally placed film holder platform at the level of inframammary crease.
where [F.sub.max] is the maximum applied force and Acs is the cross-sectional area of the edge of the film located in the path of the cylindrical hole of the film holder, with Acs = 2r[delta], where r is the radius of the hole and S is the thickness of the film.
Tenders are invited for Supply Of Holder Tap / Release Film Holder
* New motorised film holder to enable easy batch scanning.
Endo Ray II film holder (Dentsply) was used for PT while a hemostat was utilized for BAT.
Pediatric bitewing film holder: preschoolers' acceptance and radiographs' diagnostic quality.
The XCP-ORA dental X-ray film holder combines all three of these dental X-ray functions into one device, in contrast to the previous generation of XCP holders.
The multi-featured scanning solution also allows users to scan pages directly into a search-ready PDF document and features a built-in transparency unit specially designed for scanning 35mm film and slides through a supplied film holder.
The multi-featured scanning solution is also equipped with 4800 dpi scan resolution and a built-in transparency unit specially designed for scanning 35mm film and slides through a supplied film holder. It is also capable of landscape and portrait scanning orientation for easy two-way scanning, while it is also bundled with the Epson Easy Photo Fix software, which eliminates the difficulty in restoring colour, correcting back light or removing dust and discoloration from images.
Scan one 35mm film strip (up to six frames) or four 35mm mounted slides with the included film holder to easily create enlargements up to 13 x 19".
This set Calumet on a new course in the 1960s, manufacturing the Caltar large-format lens line, the C-2 roll film holder, and nitrogen burst film and print processors.