CCD-world: dark signal level

[Dr. Frank W. Jenichen]

The following was posted to CCD-world:

MYPIXEL at aol.com schrieb:

> The following was posted to CCD-world:
>
> In a message dated 10/18/99 1:57:20 AM Pacific Daylight Time,
> aiming at tin.it
> writes:
>
> << The following was posted to CCD-world:
>
>  Somebody have measured the ratio "dark signal noise"/"mean dark
> signal
>  level" at various mean dark signal level of standard or MPP CCD
> sensors?
>
>  Marco Fiaschi >>
>
> ******************jj
> Dark current nonuniformity varies but should be somewhere in the
> neighborhold
> of 10 %.   .  worse than pixel nonuniformity (about 1 %).
> *******************jj

Which types of CCD do You use? On Which level is Your information based?
Normally the nonuniformity is caused by not very uniform cooling and by
the extensive use of the output amplifiers (as fast as they work,
without reserve so they heat from one side). Nevertheless the
nonuniformity should be better than 10%.

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greetings
--
Frank Jenichen
==================================
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==================================
- -- CCD-world -- --
CCD-world is fully moderated. Send posts to CCD-world at astro.ku.dk
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For more information, please go to:  http://www.not.iac.es/CCD-world/