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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What determines the name for a darkroom filter for a safelight?
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The type of film used
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True or False
As long as you use a safelight in a darkroom you can have film out indefinitely without being affected. |
False, can only have film exposed to safelights for a short period otherwise the film will fog
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What kind of door is most commonly used in a darkroom?
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single door
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What is the 3 step overall image process?
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Latent Image --> Image Processing --> Manifest Image
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Is PAC's part of the image processing system?
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No, PAC's is picture archiving communication system, storage and retrieval computer system
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Explain the process where the latent image is stored on film?
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ionization causes the silver ions to be attracted to the "sensitive speck" on the film. The greater the amount of ions that hit the darker the image
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How is the latent image stored on a CR cassette?
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Phorphor on plates acts similar to crystals on film. They "trap" electron energy and store image
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How does a CR scanner/reader get the the image?
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A laser light scans plate in a raster pattern. Stored energy is released in the form of blue-violet light. the more energy stored, the more released and the darker the image.
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Electrons on film create an image as a result of _____________
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ionization
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Electrons on a phosphor plate on CR store energy by ____________
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excitation
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Electrons on DR create images by what process?
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Direct digitizing
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When processing film the developer works on the __________ part of the film while the fixer works on the _________ part of the film
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exposed
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unexposed
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What are the 2 parts of the developer?
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Reducing agents and
Hardener |
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Name the 3 parts of the Fixer?
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1. Fixing agent
2. Acidifier 3. Hardener |
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Decade when manual/hand processing of film was phased out by automatic processing
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early 1960's
when did CR/DR get its start? |
1990's
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What was the imaging equipment that started DR?
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C-arm flouroscopy
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4 components in automatic processing?
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1. Developer
2. Fixer 3. Wash 4. Dry Why is it bad for developer and fixer to mix? |
Because developer is alkaline (basic) and fixer is acidic, so when they mix they neutralize each other
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What are the 3 automatic processing systems?
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1. Transport
2. Water 3. Cross over rollers |
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what does the detection switch do?
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shows when film is loaded by light and ding sound and also stops replenishment of chemicals which happens as the film loads
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2 functions of water in automatic processing system?
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1. washes film
2. maintains temperature for processing |
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How does the chemicals get recirculated and replenished?
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by the action of the cross over rollers
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What is the purpose of guide shoes?
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They guide film over into the next rack.
why might happen if they are not properly placed? |
might leave an artifact
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