Signal-to-Noise Ratio (SNR): Difference between revisions

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Signal-to-noise Ratio it the ratio between the actual image (signal) and noise like scintillation.
Signal-to-noise Ratio it the ratio between the actual image (signal) and noise like shot noise, scintillation and MCP induced noise.


Typical Ratios are:
Typical specs are:


* Gen 0 & 1: over 40
* Gen 0<ref name=":0">https://web.archive.org/web/20220927233831/https://www.photonics.com/Articles/Image_Intensification_The_Technology_of_Night/a25144</ref>
** SNR ~2
** Gain >1
* Gen 1<ref name=":0" />
** SNR ~6
** Gain ~70


* Gen 2 (depending on time of manufacture): 10-32
* Gen 2 (introduction of the MCP)<ref name=":0" />
** SNR ~11
** Gain 3.5k to 10k
* Gen 2+<ref>https://web.archive.org/web/20220317190617/https://www.photonis.com/system/files/2020-11/201120c-Leafet-XR5.pdf</ref>
** SNR <30
** Gain 10k to 60k
* Advanced Gen 2+<ref>https://web.archive.org/web/20210917045203/https://www.photonis.com/system/files?file=2021-05/210507%20Leaflet%204G%2B_0.pdf</ref>
** SNR <40


* Gen 3: 15-35
* Gen 3<ref>https://web.archive.org/web/20220812210329/https://www.asu-nvg.com/Documents%20and%20Settings/39/Site%20Documents/Product%20Spec%20Sheets/New/F9800M16G_M18G_M20GSpecSheet.pdf</ref>
** SNR <35
** Gain 20k to 80k
* Advanced Gen 3<ref>https://web.archive.org/web/20220829150300/https://tnvc.com/supergain/</ref>
** SNR <50
** Gain 60k to 120k


A bad SNR, compared to other the datasheet or the general specifications, can be one sign of a Tube that at its end of life.  
A very noisy and possibly dim image can be one sign of a end of life conditions if it can be assumed the factory specifications were considerably higher than what is observerd.  


=== References ===
<references />
[[Category:Technology]]
[[Category:Technology]]

Revision as of 17:56, 10 January 2023

⚠ This page is a stub. Feel free to contribute more information here.

Signal-to-noise Ratio it the ratio between the actual image (signal) and noise like shot noise, scintillation and MCP induced noise.

Typical specs are:

  • Gen 0[1]
    • SNR ~2
    • Gain >1
  • Gen 1[1]
    • SNR ~6
    • Gain ~70
  • Gen 2 (introduction of the MCP)[1]
    • SNR ~11
    • Gain 3.5k to 10k
  • Gen 2+[2]
    • SNR <30
    • Gain 10k to 60k
  • Advanced Gen 2+[3]
    • SNR <40
  • Gen 3[4]
    • SNR <35
    • Gain 20k to 80k
  • Advanced Gen 3[5]
    • SNR <50
    • Gain 60k to 120k

A very noisy and possibly dim image can be one sign of a end of life conditions if it can be assumed the factory specifications were considerably higher than what is observerd.

References

  1. ↑ 1.0 1.1 1.2 https://web.archive.org/web/20220927233831/https://www.photonics.com/Articles/Image_Intensification_The_Technology_of_Night/a25144
  2. ↑ https://web.archive.org/web/20220317190617/https://www.photonis.com/system/files/2020-11/201120c-Leafet-XR5.pdf
  3. ↑ https://web.archive.org/web/20210917045203/https://www.photonis.com/system/files?file=2021-05/210507%20Leaflet%204G%2B_0.pdf
  4. ↑ https://web.archive.org/web/20220812210329/https://www.asu-nvg.com/Documents%20and%20Settings/39/Site%20Documents/Product%20Spec%20Sheets/New/F9800M16G_M18G_M20GSpecSheet.pdf
  5. ↑ https://web.archive.org/web/20220829150300/https://tnvc.com/supergain/
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