Monday, September 30, 2013
Teledyne DALSA Announces Full-Frame 32MP CCD Family
Teledyne DALSA releases a new FTF7046 family of full frame image sensors with 32MP. Using the latest 5.2um pixel, the company says it is able to preserve DR (>72dB linear), QE, and FF (>90%) in the FTF7046 even as they reduced pixel size to deliver 32MP in a 35mm optical format. The FTF7046 image sensors are available in color (RGB) and monochrome models. The sensor's frame rate is 1.2fps with 2 x 25MHz parallel outputs.
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the QE is not >90%. it is 17/27/32 % for B/G/R respectively according to their data sheet
ReplyDeleteThe 90% relates to FF, rather than QE.
DeleteAnon,
DeleteIs 17/27/32 % really their peak B/G/R QE numbers?
If so, does anybody have any idea why the peak QE is so low? They are claiming "our engineers were able to preserve dynamic range, quantum efficiency and fill factor ... even as they reduced pixel size to deliver 32 megapixels in a 35 mm optical format" -- even though 5.2um is not a small pixel size by any measure. Maybe their fab is very old, so this is a small pixel size and good QE by Dalsa's standards?
" ...these CCDs are ideal for demanding applications where image quality is paramount, such as aerial photogrammetry, fabric and artwork reproduction, document scanning and professional studio photography" -- it seems they intend these sensors for applications where the lighting is well controlled.
"Offering features including >90% fill factor, high sensitivity and dynamic range, wide angular response, and optimized coverage of the visual spectrum..." -- it's not clear how these generic features are what enables the applications listed above. Also, not clear how/if the sensor has any other special features that make up for they very low QE. If so, I'd think they like to list them.
I guess I'm just trying to say that this appears to be a very boring, low performance sensor. However, I'm assuming Dalsa must have had a very good reason to make it, so I don't think it was explained well in this press release, so I'd be curious to learn more about what is really special about this sensor.
-DP
What is the advantage of this CCD product over a CMOS one with the same resolution?
ReplyDeletefrom Dalsa's perspective it is cheaper to make a CCD because the wafer fab process is simpler. Only N channel transistors and one layer of metal perhaps. Maybe they are using 150 mm wafers and projection litho too versus 200 / 300 mm and stitched reticles with a stepper?
Delete