viechdokter 22 research notes and 22 wiki edits

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.]



Joined about 3 years ago


Spitfire peak pixel test

by viechdokter almost 3 years ago | 1 | 567 | 0




Polarizing filter effects on spectra

by viechdokter about 3 years ago | 1 | 740 | 0


Noise by colour

by viechdokter about 3 years ago | 23 | 1,005 | 1


Batch work

by viechdokter about 3 years ago | 0 | 638 | 0



Thinking about a more stable spectrometer...

by viechdokter about 3 years ago | 17 | 1,085 | 1


Distance vs light intensity first trial

by viechdokter about 3 years ago | 0 | 541 | 0


Light source limits

by viechdokter about 3 years ago | 1 | 564 | 0


Lost in calibration...

by viechdokter about 3 years ago | 6 | 567 | 0


Reproducibility test using a CFL lamp

by viechdokter about 3 years ago | 6 | 602 | 1


Reproducibility test of data using an IR lamp

by viechdokter about 3 years ago | 4 | 1,044 | 1


Repeatability

by viechdokter about 3 years ago | 7 | 784 | 2



Another one about over-exposure...

by viechdokter about 3 years ago | 3 | 551 | 1


Camera sensor issues

by viechdokter about 3 years ago | 5 | 688 | 2


Sunset

by viechdokter about 3 years ago | 0 | 457 | 1


Direct sunlight vs. diffuse sunlight...

by viechdokter about 3 years ago | 11 | 1,196 | 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 » almost 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 » almost 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 Basic Barnstar by dhaffnersr for their work published in Direct sunlight vs. diffuse sunlight....


viechdokter was awarded the Basic Barnstar by dhaffnersr for their work published in Repeatability.


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



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