Drumscanner - How does it work?
Article number: 33876
Listed in category: Service / FAQ > Drumscanner - How does it work? from brakensiek.de
Technology of a drum scanner
The electronic components for image acquisition are Lichtvervielfältigerröhren (including English, or just PMT Photo Multiplier Tubes) - it is light sensors that generate an electrical current from incident light. They are color blind, that is, it is recognized only by the intensity of color, but not the color itself. When a photomultiplier the signal is amplified in contrast to a CCD element. Therefore, the drum scanner has a greater density range than the flat-bed scanner and can play especially in dark and very bright areas are color and brightness gradations. From forth the type, the drum can be positioned horizontally, vertically or inclined.
The original is on a uniformly rotating drum - usually by means of a liquid - and fixed point-like working or illuminated. It moves parallel to the axis of rotation a scanning unit. She directs the light through an optical system and the presentation of color filters to the photomultiplier tubes. Since photomultiplier output only analog signals, or an electronics needed to digitize. Frequently, this is a plug-in card of a computer that provides the SCSI connection is available
One of the last great drum scanner manufacturer was the German firm Linotype-Hell, which was acquired in 1996 by the Heidelberg Druckmaschienen AG. The last series was the drum scanner Linotype-Hell 3000 DC series. A particularly interesting model was the Linotype-Hell Tango, in which the vertical scanning roller - was used as opposed to the usual horizontal arrangement of the scanner drum. By decreasing the need for "slide / film" digitization (also due to the change in professional photography from analog to digital technology), the "expensive" high-end scanning systems become less important. After only a few years the development of technology from Heidelberg drum scanner was completely stopped. Brakensiek System GmbH & Co. KG helps those, however, to a 2nd life and does a great job of it in stock.
Here is a list of known drum scanners arise from:
http://www.flatbed-scanner-review.org/drum_scanner_reviews/drum_scanner_reviews_links.html
Aztek bought what was left of Howtek. The scans and Howtek Aztek did for us several years ago were poor quality. The current models of Aztek are different, but if a company is not willing to Provide a scanner for testing long-range, and since we know and trust the ICG, it is the ICG that we recommend, as well as the Screen drum scanner at the high end.
Budde International Technologies Celare ScanView sells high end as well as unusual at entry level ScanMate Magic. We do still not know if this brand or model exists.
Crosfield DuPont changed hands, bought by Fuji. No longer made. If you have a used one, if it works, it ought to be good ... until you need spare parts.
€ Core Scantronix in USA Hi-Scan, 10,000 dpi, several models interface, Windows version includes SilverFast. We do still not know if this brand or model exists. Lots of drum scanner products have totally disappeared in the last three years.
Fujifilm Electronic Imaging Fuji makes industrial strength drum scanners for professional prepress, Celsis 6250 and 5250 inherited from Crosfield. We will check at DRUPA 2004, but based on comments made in 2003, Fuji is moving out of the prepress drum scanner business.
Howtek HiResolve, low end. Test scans were so bad we could not use them without massive repair, but probably if we tried other transparencies and if our own staff could do the test perhaps the results would be better. At least one Aztek Seemed to be a Howtek scanner with a different label and different software. The one set of scans from this test were also not useable, but it may have been a problem in the original transparencies.
ICG formerly Itek Colour Graphics, then ICG, then bought by Global Graphics hardware. Reborn as Heights after being in limbo for a year after a management buyout. Models 330i, 360, and 370 drum scanner. Around end of 2003, ICG reappeared on the scene via DCS Associates, we will report it what we see at Photokina 2004. DCS Associates now owns the original name of their new Sun ICG web site (as of summer 2004) is ICG.ltd.uk. Contact is Andre Fletcher, andre@dcs-imago.com. Their current model is the 380th ICG We are not able to recommend any scanner we have not used ourselves in-house (we have not used any ICG at FLAAR itself), but the people behind DCS Associates and Colour People are capable and honorable.
Imacon (Denmark) upright CCD scanner. This is not a drum scanner no matter how much their clever and frankly exaggerated ads claim it. We repeat this, this brand is not a drum scanner and ads that claim or use the designation of drum scanners are potentially misleading. If you want a drum scanner, then you do not want an Imacon because it is not a PMT technology.
Imaco (Canada) No relation to Imacon. QCS-4100 drum scanner (I did not find this in any published list of drum scanners, fished it out entirely by coincidence). I have no idea if this company still exists.
Isomet 405HR, 455HR, up to 12 500 dpi sounds rather high-end. This company fizzled out long ago.
JEI Corporation, Juno Enterprises Corporation. This drum scanner no longer exists.
Linotype-Hell, Heidelberg Tango. The best of the best, but no longer made.
Optronics ColorGetter. We have received complaints about failures in Optronics drum scanner; mute point because the company probably no longer makes these models. But be wary of used ones lurking on eBay. Never buy a used scanner if the company or that model no longer exists.
ScanView ScanMate, various models. Their flatbeds are being sold from stock on hand; Whether this scanner is quietly being developed (in the sense of improved models) is unclear.
Screen USA SG-8060P, 12,000 dpi. No scanner at their booth at DRUPA 2004, but evidently this SG-8060P Mark II drum scanner is available still. This is one of the great traditional drum scanners. We know someone who has a used earlier model, and he likes the results.
Storm, a company in Germany Which repackaged scanners from OEM sources, went bankrupt in the United States. They did not exhibit at Drupa 2004, nor did I hear a peep about them while in Germany.
As you can see, more than half the drum scanner manufacturers went belly up between 1999 and 2002 (most failed in the last two years). Why?
Quellle: Wikipeda
The electronic components for image acquisition are Lichtvervielfältigerröhren (including English, or just PMT Photo Multiplier Tubes) - it is light sensors that generate an electrical current from incident light. They are color blind, that is, it is recognized only by the intensity of color, but not the color itself. When a photomultiplier the signal is amplified in contrast to a CCD element. Therefore, the drum scanner has a greater density range than the flat-bed scanner and can play especially in dark and very bright areas are color and brightness gradations. From forth the type, the drum can be positioned horizontally, vertically or inclined.
The original is on a uniformly rotating drum - usually by means of a liquid - and fixed point-like working or illuminated. It moves parallel to the axis of rotation a scanning unit. She directs the light through an optical system and the presentation of color filters to the photomultiplier tubes. Since photomultiplier output only analog signals, or an electronics needed to digitize. Frequently, this is a plug-in card of a computer that provides the SCSI connection is available
One of the last great drum scanner manufacturer was the German firm Linotype-Hell, which was acquired in 1996 by the Heidelberg Druckmaschienen AG. The last series was the drum scanner Linotype-Hell 3000 DC series. A particularly interesting model was the Linotype-Hell Tango, in which the vertical scanning roller - was used as opposed to the usual horizontal arrangement of the scanner drum. By decreasing the need for "slide / film" digitization (also due to the change in professional photography from analog to digital technology), the "expensive" high-end scanning systems become less important. After only a few years the development of technology from Heidelberg drum scanner was completely stopped. Brakensiek System GmbH & Co. KG helps those, however, to a 2nd life and does a great job of it in stock.
Here is a list of known drum scanners arise from:
http://www.flatbed-scanner-review.org/drum_scanner_reviews/drum_scanner_reviews_links.html
Aztek bought what was left of Howtek. The scans and Howtek Aztek did for us several years ago were poor quality. The current models of Aztek are different, but if a company is not willing to Provide a scanner for testing long-range, and since we know and trust the ICG, it is the ICG that we recommend, as well as the Screen drum scanner at the high end.
Budde International Technologies Celare ScanView sells high end as well as unusual at entry level ScanMate Magic. We do still not know if this brand or model exists.
Crosfield DuPont changed hands, bought by Fuji. No longer made. If you have a used one, if it works, it ought to be good ... until you need spare parts.
€ Core Scantronix in USA Hi-Scan, 10,000 dpi, several models interface, Windows version includes SilverFast. We do still not know if this brand or model exists. Lots of drum scanner products have totally disappeared in the last three years.
Fujifilm Electronic Imaging Fuji makes industrial strength drum scanners for professional prepress, Celsis 6250 and 5250 inherited from Crosfield. We will check at DRUPA 2004, but based on comments made in 2003, Fuji is moving out of the prepress drum scanner business.
Howtek HiResolve, low end. Test scans were so bad we could not use them without massive repair, but probably if we tried other transparencies and if our own staff could do the test perhaps the results would be better. At least one Aztek Seemed to be a Howtek scanner with a different label and different software. The one set of scans from this test were also not useable, but it may have been a problem in the original transparencies.
ICG formerly Itek Colour Graphics, then ICG, then bought by Global Graphics hardware. Reborn as Heights after being in limbo for a year after a management buyout. Models 330i, 360, and 370 drum scanner. Around end of 2003, ICG reappeared on the scene via DCS Associates, we will report it what we see at Photokina 2004. DCS Associates now owns the original name of their new Sun ICG web site (as of summer 2004) is ICG.ltd.uk. Contact is Andre Fletcher, andre@dcs-imago.com. Their current model is the 380th ICG We are not able to recommend any scanner we have not used ourselves in-house (we have not used any ICG at FLAAR itself), but the people behind DCS Associates and Colour People are capable and honorable.
Imacon (Denmark) upright CCD scanner. This is not a drum scanner no matter how much their clever and frankly exaggerated ads claim it. We repeat this, this brand is not a drum scanner and ads that claim or use the designation of drum scanners are potentially misleading. If you want a drum scanner, then you do not want an Imacon because it is not a PMT technology.
Imaco (Canada) No relation to Imacon. QCS-4100 drum scanner (I did not find this in any published list of drum scanners, fished it out entirely by coincidence). I have no idea if this company still exists.
Isomet 405HR, 455HR, up to 12 500 dpi sounds rather high-end. This company fizzled out long ago.
JEI Corporation, Juno Enterprises Corporation. This drum scanner no longer exists.
Linotype-Hell, Heidelberg Tango. The best of the best, but no longer made.
Optronics ColorGetter. We have received complaints about failures in Optronics drum scanner; mute point because the company probably no longer makes these models. But be wary of used ones lurking on eBay. Never buy a used scanner if the company or that model no longer exists.
ScanView ScanMate, various models. Their flatbeds are being sold from stock on hand; Whether this scanner is quietly being developed (in the sense of improved models) is unclear.
Screen USA SG-8060P, 12,000 dpi. No scanner at their booth at DRUPA 2004, but evidently this SG-8060P Mark II drum scanner is available still. This is one of the great traditional drum scanners. We know someone who has a used earlier model, and he likes the results.
Storm, a company in Germany Which repackaged scanners from OEM sources, went bankrupt in the United States. They did not exhibit at Drupa 2004, nor did I hear a peep about them while in Germany.
As you can see, more than half the drum scanner manufacturers went belly up between 1999 and 2002 (most failed in the last two years). Why?
Quellle: Wikipeda
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last update:
21.05.2012
