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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise



 
 
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  #1  
Old July 11th 09, 09:32 AM posted to rec.photo.digital
Alfred Molon[_4_]
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Posts: 2,591
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise

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.
--

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
  #2  
Old July 11th 09, 01:51 PM posted to rec.photo.digital
Chris Malcolm[_2_]
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Posts: 3,142
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise

Alfred Molon wrote:
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 ?, 5MP


In any case, this technology has no reached the consumer sector.


Not quite yet. The first use of it will reach the consumer sector next
month, in Sony's two new HD video cameras the HDR-CX520VE/505VE. The
chips have been in mass production and on sale for very roughly a year
now and will soon appear in other products by other manufacturers.
This is not a flash-in-the-pan, it's the first development for the
market of a new sensor technology which is being developed and refined
and will appear in other sizes, megapixels, densities, etc..

The increased signal to noise ratio, even if Sony are exaggerating a
bit, is sufficiently dramatic to refute the claims of those who have
been arguing that current sensor pixel performance had reached some
kind of physically limited plateau in which the only possibilities
were juggling the existing compromises between size, resolution, and
noise.

--
Chris Malcolm
  #3  
Old July 11th 09, 03:04 PM posted to rec.photo.digital
Don Stauffer
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Posts: 237
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise

Alfred Molon wrote:
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.



Something seems not quite right. 8db is not a great SNR in my book.
  #4  
Old July 11th 09, 03:19 PM posted to rec.photo.digital
TheRealSteve
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Posts: 325
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise


On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer
wrote:

Alfred Molon wrote:
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.



Something seems not quite right. 8db is not a great SNR in my book.


Sounds like it's saying that it's 8db *better* than existing Sony CMOS
sensors of the same pixel size. 8db *better* SNR is huge in the world
of signal processing.

Steve
  #5  
Old July 11th 09, 03:53 PM posted to rec.photo.digital
SMS
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Posts: 2,312
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise

Don Stauffer wrote:
Alfred Molon wrote:
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.



Something seems not quite right. 8db is not a great SNR in my book.


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.
  #6  
Old July 11th 09, 04:26 PM posted to rec.photo.digital
Alfred Molon[_4_]
external usenet poster
 
Posts: 2,591
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise

In article , SMS says...

Maybe 8dB is an improvement in the consumer market.


An increment of 8dB is an increase by a factor of 2.5. Very significant
in any sector - both consumer and professional.
--

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
  #7  
Old July 11th 09, 05:21 PM posted to rec.photo.digital
SMS
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Posts: 2,312
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise

Alfred Molon wrote:
In article , SMS says...

Maybe 8dB is an improvement in the consumer market.


An increment of 8dB is an increase by a factor of 2.5. Very significant
in any sector - both consumer and professional.


That article didn't say "an increment".
  #8  
Old July 11th 09, 05:36 PM posted to rec.photo.digital
[email protected]
external usenet poster
 
Posts: 259
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise

On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer
wrote:

Alfred Molon wrote:
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.



Something seems not quite right. 8db is not a great SNR in my book.


It doesn't say that. It says "in comparison"
  #9  
Old July 11th 09, 07:01 PM posted to rec.photo.digital
Alfred Molon[_4_]
external usenet poster
 
Posts: 2,591
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise

In article , SMS says...
Alfred Molon wrote:
In article , SMS says...

Maybe 8dB is an improvement in the consumer market.


An increment of 8dB is an increase by a factor of 2.5. Very significant
in any sector - both consumer and professional.


That article didn't say "an increment".


It says "Signal-to-noise ratio improvement of +8dB", i.e. 8dB more = an
increment of 8 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
  #10  
Old July 11th 09, 08:21 PM posted to rec.photo.digital
Paul Furman
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Posts: 7,367
Default Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise

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?

Very significant
in any sector - both consumer and professional.


That article didn't say "an increment".


It says "Signal-to-noise ratio improvement of +8dB", i.e. 8dB more = an
increment of 8 dB.



--
Paul Furman
www.edgehill.net
www.baynatives.com

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