Re: About CCD response
From: Jens Dierks (me_at_privacy.net)
Date: 06/18/04
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Date: Fri, 18 Jun 2004 21:47:24 +0200
Paco Rosso wrote:
> For example, in the specifications of Kodak KAF 16802 (a 4080x4080 pixel
> CCD) I read:
>
> Dark signal: 2.7mV
> Saturation signal Vsat: 1650mv
> Linear dynamic range: 73db
>
> Acording to Kodak paper DS 00-001 "Application note solid state image
> sensors therminology" (page 16)
>
> Dinamic range is: 20*log (Vsat/Vdark)
In the KAF16802 data*** it is 20*log (Vsat/Vn), with N= total noise (21e-).
Vn is 21e- * 17.5µV/e- = 0.3675mV, so the result for the dynamic range
is 73dB.
Vdark is just a dc-value and varies at different temperatures and
exposure+readouttimes. When Vdark gets higher, the rms-Value of it
will increase the total noise.
greets,
Jens
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