Algae optical effects (various years, Taivaanvahti)
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Algae optical effects (various years, Taivaanvahti)
I collect here observation(s) for algae optics in Taivaanvahti for the summer season 2019.
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first one from Jari Luomanen
https://www.taivaanvahti.fi/observations/show/83091
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first one from Jari Luomanen
https://www.taivaanvahti.fi/observations/show/83091
Zuletzt geändert von Timo Kuhmonen am 22. Jun 2020, 12:58, insgesamt 2-mal geändert.
- Elmar Schmidt
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Re: algae optical effects (season 2019, Taivaanvahti)
Thanks, nice!
The off-center interferences must be Quetelet fringes, do they go by another name in Finnish?
Elmar
The off-center interferences must be Quetelet fringes, do they go by another name in Finnish?
Elmar
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Re: algae optical effects (season 2019, Taivaanvahti)
In Taivaanvahti obswervation page -> if you press the info button, there is a description in finnish. See blue "i" letter inside a circle. I am not sure how the translation to these optics effects are done, but I understood those were known in foreing literature. I remember first hearing from algae optics, at observations from M. Riikonen...
- Elmar Schmidt
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Re: algae optical effects (season 2019, Taivaanvahti)
Thanks again, Timo!
I clicked the (?) button and used Bing Translator (actually, not bad for Finnish...). Yes, the large radius rings through the sun's reflection are Quetelet rings. The other phenomena are coronae, and glories on the pond.
Kind regards
Elmar
I clicked the (?) button and used Bing Translator (actually, not bad for Finnish...). Yes, the large radius rings through the sun's reflection are Quetelet rings. The other phenomena are coronae, and glories on the pond.
Kind regards
Elmar
- Claudia Hinz
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Re: algae optical effects (season 2019, Taivaanvahti)
Nämä ovat ihania valokuvia!
Tervehdys Jarille ja kiitos osoituksesta.
Tervehdys Jarille ja kiitos osoituksesta.
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Re: algae optical effects (season 2019, Taivaanvahti)
Nice pictures! Never saw such phenomena myself though. It is remarkable that algae are the only other "partictles" apart from water drops that are known to cause glories.
Best regards,
Alex
Best regards,
Alex
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Re: algae optical effects (season 2019, Taivaanvahti)
fyi. Observation by Satu J. (Lieksa, Finland). According to comments, 70...200 tele lens was used, this might be one point why the images do look like a bit different (to normal wide angle algae photos...)
https://www.taivaanvahti.fi/observations/show/83297
https://www.taivaanvahti.fi/observations/show/83297
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Re: algae optical effects (various years, Taivaanvahti)
fyi. Observation from Helsinki & Finland (21.6.2020)
https://www.taivaanvahti.fi/observations/show/91334
https://www.taivaanvahti.fi/observations/show/91334
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Re: Algae optical effects (various years, Taivaanvahti)
FYI. Observation from Raisio & Finland (23.6.2020), this phenomena mentioned to be related to Nautococcus -algae. Colors on the phenomena seem to be very strong...
https://www.taivaanvahti.fi/observations/show/91349
https://www.taivaanvahti.fi/observations/show/91349
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Re: Algae optical effects (various years, Taivaanvahti)
FYI; additional images from Raisio observation location (24.6.2020). To my opinion it looks very nice 
https://www.taivaanvahti.fi/observations/show/91369

https://www.taivaanvahti.fi/observations/show/91369
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