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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer wrote:
"The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. I've seen a couple of posts in the DPR forums by those who seem to be quite knowledgeable claiming that backlighting does work, but that the larger the pixel size, the less effective it becomes. Have you heard anything like this? |
#13
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sat, 11 Jul 2009 16:23:19 -0400, ASAAR wrote:
On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer wrote: "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. I've seen a couple of posts in the DPR forums by those who seem to be quite knowledgeable claiming that backlighting does work, but that the larger the pixel size, the less effective it becomes. Have you heard anything like this? Well duh, ASSAR, one only has to see the kindergartner's graphics on that page to see why. Holy **** are you ever an idiot troll. Not even a half-assed one. I guess the reason backlighting is just a fad and a marketing ploy is the same reason that the very best astrophotographers used only these kinds of sensors for many years, at great cost. Damn, are you trolls ever slow to the trough. I guess that's why you are trolls and have no other life nor knowledge of any other life. |
#14
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sat, 11 Jul 2009 16:01:00 -0500, Idiots R US wrote:
I've seen a couple of posts in the DPR forums by those who seem to be quite knowledgeable claiming that backlighting does work, but that the larger the pixel size, the less effective it becomes. Have you heard anything like this? Well duh, ASSAR, one only has to see the kindergartner's graphics on that page to see why. Holy **** are you ever an idiot troll. Not even a half-assed one. Must be, since I didn't explicitly point out that this useful new sensor design would obviously be more beneficial for your teeny pixel P&S buddies and less useful for the DSLRs that you loathe. You seem to be devolving by the hour. Is there anything we can do to help? . . . Speed up the process, that is. |
#15
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
In article , ASAAR says...
I've seen a couple of posts in the DPR forums by those who seem to be quite knowledgeable claiming that backlighting does work, but that the larger the pixel size, the less effective it becomes. Have you heard anything like this? The problem with front-illumination is among others the wiring obstructing the image sensitive area. With huge pixels the percentage of pixel area covered by wiring is probably smaller than with small pixelsand this could be a factor. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#16
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
In article , Paul Furman
says... Alfred Molon wrote: SMS says... Alfred Molon wrote: SMS says... You're right, but remember these are small sensors with a small pixel pitch. A full frame sensor will typically have a SNR of over 35dB, and a pixel pitch 4-5 times larger. A typical professional video camera will have an SNR of over 60db. Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. So it was 12dB, now 20dB? What was 12 dB? -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#17
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sun, 12 Jul 2009 00:45:53 +0200, Alfred Molon wrote:
The problem with front-illumination is among others the wiring obstructing the image sensitive area. With huge pixels the percentage of pixel area covered by wiring is probably smaller than with small pixelsand this could be a factor. Sounds reasonable, but then other than the placement of the wires, is there any significant difference between front and rear illumination sensels and possibly the semiconductor's type (such as P vs. N) first exposed to photons? |
#18
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
? "ASAAR" ?????? ??? ?????? ... On Sun, 12 Jul 2009 00:45:53 +0200, Alfred Molon wrote: The problem with front-illumination is among others the wiring obstructing the image sensitive area. With huge pixels the percentage of pixel area covered by wiring is probably smaller than with small pixelsand this could be a factor. Sounds reasonable, but then other than the placement of the wires, is there any significant difference between front and rear illumination sensels and possibly the semiconductor's type (such as P vs. N) first exposed to photons? I think greater quantum efficiency. -- Tzortzakakis Dimitris major in electrical engineering mechanized infantry reservist hordad AT otenet DOT gr |
#19
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
Alfred Molon wrote in
: Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Not from any Jap manufacturer. They had this for consumer-aimed scientific CCDs for years. |
#20
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Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise
Alfred Molon wrote:
In article , Paul Furman says... Alfred Molon wrote: SMS says... Alfred Molon wrote: SMS says... You're right, but remember these are small sensors with a small pixel pitch. A full frame sensor will typically have a SNR of over 35dB, and a pixel pitch 4-5 times larger. A typical professional video camera will have an SNR of over 60db. Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. So it was 12dB, now 20dB? What was 12 dB? Whatever increased by 8 dB, I don't know. -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
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