Difference between revisions of "Scanner camera"
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| − | A '''scanner camera''' is a [[digital camera]] which uses no rectangular image sensor chip. Instead it uses a narrow long scan sensor bar with one row of light sensitive [[pixel]]s on its surface for black&white scans or three rows instead for color scans, one pixel row for green, one for blue and one for red light. Scanning sensors may be used in professional [[repro camera]]s. Adventurous amateur tinkerers have also created their own scanning cameras. | + | A '''scanner camera''' is a [[digital camera]] which uses no rectangular image sensor chip. Instead it uses a narrow long scan sensor bar with one row of light sensitive [[pixel]]s on its surface for black&white scans or three rows instead for color scans, one pixel row for green, one for blue and one for red light. Scanning sensors may be used in professional [[repro camera]]s. Adventurous amateur tinkerers have also created their own scanning cameras. [[Pentacon]] is known as maker of scanner [[SLR]] cameras, other makers like [[Anagramm]] and [[Betterlight]] focused on making '''scanback'''s, i.e. [[digital back]]s based on scanner technology for [[large format]] frame sizes 4×5" and 9×12cm. Thus tinkerers and camera-back makers had the same concept, to make [[large format]] cameras capable to shoot digitally since conventional image sensors wil never reach large format size. Thus the scanner cameras have a future til the day when foil sensors in any size will be available. |
The principle of the camera is that the sensor bar is moved along the image plane by a stepper motor. During its travel its light sensitive surface is exactly in the image plane and facing the lens. The step movements are interrupted for the scan of each image pixel row. Thus the sensor bar's movement is comparable with the movement of the slit of a [[focal plane shutter]] of an analog camera. But the focal plane shutter moves at fast speeds as slit whilst the sensor of a scanner camera might need more time for its travel. | The principle of the camera is that the sensor bar is moved along the image plane by a stepper motor. During its travel its light sensitive surface is exactly in the image plane and facing the lens. The step movements are interrupted for the scan of each image pixel row. Thus the sensor bar's movement is comparable with the movement of the slit of a [[focal plane shutter]] of an analog camera. But the focal plane shutter moves at fast speeds as slit whilst the sensor of a scanner camera might need more time for its travel. | ||
Revision as of 10:22, 10 February 2014
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| homemade scanner cam based on Speed Graphic image by Beau Daignault (Image rights) |
A scanner camera is a digital camera which uses no rectangular image sensor chip. Instead it uses a narrow long scan sensor bar with one row of light sensitive pixels on its surface for black&white scans or three rows instead for color scans, one pixel row for green, one for blue and one for red light. Scanning sensors may be used in professional repro cameras. Adventurous amateur tinkerers have also created their own scanning cameras. Pentacon is known as maker of scanner SLR cameras, other makers like Anagramm and Betterlight focused on making scanbacks, i.e. digital backs based on scanner technology for large format frame sizes 4×5" and 9×12cm. Thus tinkerers and camera-back makers had the same concept, to make large format cameras capable to shoot digitally since conventional image sensors wil never reach large format size. Thus the scanner cameras have a future til the day when foil sensors in any size will be available.
The principle of the camera is that the sensor bar is moved along the image plane by a stepper motor. During its travel its light sensitive surface is exactly in the image plane and facing the lens. The step movements are interrupted for the scan of each image pixel row. Thus the sensor bar's movement is comparable with the movement of the slit of a focal plane shutter of an analog camera. But the focal plane shutter moves at fast speeds as slit whilst the sensor of a scanner camera might need more time for its travel.
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| Home-made scanner camera image by Antonio Giordano (Image rights) |
 
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| same field camera with other scanner backs images by Antonio Giordano (Image rights) |
 
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| 8x10inch camera images by Branislav Vojnovic (Image rights) |
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| Home-made scanner camera image by Antonio Giordano (Image rights) |
