viechdokter 22 research notes and 22 wiki edits | Joined about 3 years ago

I always loved physics. But because I found something even cooler for a profession I just stayed an amateur physicist. Gravity, waves, particles, strings and relativity make my eyes shine and sometimes my head spin.

Perhaps I love physics for the same reason Newton did: "I can calculate the motion of heavenly bodies, but not the madness of people."

And in the night time, when I go for the last walk with my dog and I look at the stars I remember Fox Mulder: "The truth is somewhere out there..."

[PS: I use Desktop Spectrometry Kit v3.0 with the JDEPC-OV04 webcam.]






Spitfire peak pixel test

by viechdokter about 3 years ago | 1 | 572 views | 0




Polarizing filter effects on spectra

by viechdokter about 3 years ago | 1 | 89 views | 0


Noise by colour

by viechdokter about 3 years ago | 23 | 100 views | 1


Batch work

by viechdokter about 3 years ago | 0 | 642 views | 0




Distance vs light intensity first trial

by viechdokter about 3 years ago | 0 | 27 views | 0


Light source limits

by viechdokter about 3 years ago | 1 | 569 views | 0


Lost in calibration...

by viechdokter about 3 years ago | 6 | 568 views | 0


Reproducibility test using a CFL lamp

by viechdokter about 3 years ago | 6 | 24 views | 1



Repeatability

by viechdokter about 3 years ago | 7 | 84 views | 2



Another one about over-exposure...

by viechdokter about 3 years ago | 3 | 38 views | 1


Camera sensor issues

by viechdokter about 3 years ago | 5 | 33 views | 2


Sunset

by viechdokter about 3 years ago | 0 | 39 views | 1


Direct sunlight vs. diffuse sunlight...

by viechdokter about 3 years ago | 11 | 302 views | 0


View these maps at MapKnitter.org »

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Comments

Comment Last activity Moderation
"Thanx for explaining all this. Uhm, these "raw pixel data" you talked about, is THIS an electron/photon count? And if so, how long does the normal ..." | Read more » about 3 years ago
"Ah, okay, I forgot about the "%" sign. I knew I was missing something. Just didn't know what exactly. Thanx for the quick answers. " | Read more » about 3 years ago
"@stoft: I support the idea of a review committee. Not for ranking but for advice. Makes much more sense in promoting the quality stuff and in advis..." | Read more » about 3 years ago
"I still wonder... if the little boy coincidentally meets Sir Newton in the garden and asks about the apple and the moon he might just get an answer..." | Read more » about 3 years ago
"Sounds great so far. One question: if you put a second slit right in front of the grating/webcam subset - wouldn't the light be even more parallel? " | Read more » about 3 years ago
"@warren: I just had a look at an old spectrum CSV file of yours (3 years ago): https://spectralworkbench.org/spectrums/481 There it was unscaled ..." | Read more » about 3 years ago
"Talking about hung-up scripts, it often is a pain in the neck to login to SBW. "Do you trust this site with your identity?" "Yes" "You must login t..." | Read more » about 3 years ago
"I do agree that "someone" should try to organize content into categories, but I thought that's what the tags were for? As for the filtering of "go..." | Read more » about 3 years ago
"I could re-scale but ... when everybody here gets the same minimum 2.55 increments here and you want reproducible spectral data then everyone shoul..." | Read more » about 3 years ago
"I took the data from the CSV files that Spectral Workbench provides with my spectra. I had a look at one of dhaffners spectrum CSV files and see th..." | Read more » about 3 years ago
"Okay, here I combined the 4 channel max/min-difference curves in one diagram so they have the same vertical scale now: And here the combined dat..." | Read more » about 3 years ago
"Wow, "citizen scientist"! I have never thought about it that way. But you are right. I dived into PLab spectrometry by chance and found that it rea..." | Read more » about 3 years ago
"Looks like at least there are no "bad" pixels as they all show about the same amount of noise. The time averaging seems to achieve a very sharp-pe..." | Read more » about 3 years ago
"Two thoughts: first, the bees sometimes bring in different sorts of pollen, its not 100% sorted although the bees "try to" sort. second, I'd gues..." | Read more » about 3 years ago
"Talking about bits and quantization: I also noticed that certain values (2.55 and multiples thereof like 5.1, 7.65 ...) appear in every spectrum's ..." | Read more » about 3 years ago
"Well, you could send your lamp here to Germany but I guess you will find some other community members closer to you... " | Read more » about 3 years ago
"@warren:They would be low-noise green if you average them. ;-) @stoft: BTW, I noticed that curves that were averaged over two or more channels l..." | Read more » about 3 years ago
"@stoft: Yes, the second try suggests it is probably more a noise problem. I will re-do the test very carefully and see what a third data row brings..." | Read more » about 3 years ago
"This looks pretty "repeatable". Peaks all in the same places. The 10 min peak is a little higher than the later ones but not too far off. Next ste..." | Read more » about 3 years ago
"Yeah, I think I could do it. Hmh, I must admit that I only pretty recently started to use Excel-like programs at all. To be honest, your research n..." | Read more » about 3 years ago
"Yes, you are right. I, too, like comparable curves better. I used LibreOffice, a kind of public domain "Excel". It plots diagrams automatically and..." | Read more » about 3 years ago
"@stoft : sorry I had to revise the research note as there was a big mistake in the red curve. I exchanged it with the new revised red curve and now..." | Read more » about 3 years ago
"@stoft : RGGB like in this picture? " | Read more » about 3 years ago
"The little thing with the hole in front of your DVD - is this for preventing stray light coming in? " | Read more » about 3 years ago

viechdokter was awarded the Basic Barnstar by warren for their work published in Thinking about a more stable spectrometer....


viechdokter was awarded the Empiricism Barnstar by warren for their work published in Repeatability.



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