Comments

Author Comment Last activity Moderation
viechdokter "Look further down at about 420 nm. The fun starts there. " | Read more » almost 8 years ago
viechdokter "No, the cellphone I only use for the nice flower pix... ;-) For the spectra I use the Desktop Spectrometry Kit v3.0 with the JDEPC-OV04 webcam. " | Read more » almost 8 years ago
viechdokter "Hi Dave, yes, of course the DVD grating spreads the light but what I meant was a splitting of the light beam into two parts, where one part could ..." | Read more » almost 8 years ago
viechdokter "Hi Chris, I just had a look at the "ideal spectra" above. The ones with the 100% straight lines. Made me think about how light is created in the l..." | Read more » almost 8 years ago
viechdokter "So what's your verdict? I see some differences in the curves. The laser pointer seems to shift the colour peaks a bit towards blue. Light and dark ..." | Read more » almost 8 years ago
viechdokter "Yes, those linear diode array spectrometers were exactly what I had in mind. Unfortunately I am not so good at electronics and programming but that..." | Read more » almost 8 years ago
viechdokter "Hi Chris, you said "consumer cameras don't have yellow sensors". All the modern cameras I know just have the RGB sensors. I wonder if we would get ..." | Read more » almost 8 years ago
viechdokter " " | Read more » almost 8 years ago
viechdokter "Hi Chris, you are right, the settings are important too. I absolutely forgot to mention them. Here is a (translated) snapshot of the settings: ..." | Read more » almost 8 years ago
viechdokter "Okay, now I understand. Thanx. " | Read more » almost 8 years ago
viechdokter "Okay, my sunlight did not show much UV because I let it shine through a glass window. Next time I will try without the glass. (Waiting for the nex..." | Read more » almost 8 years ago
viechdokter "Thank you Dave. By the way, I had a look at your works and was very impressed. (Not that I would have understood most of it...) But one question ca..." | Read more » almost 8 years ago
viechdokter " Tried the substraction and yes, it does show the dips! Cool! " | Read more » almost 8 years ago
viechdokter "Looks like TWO spectra and not like a spectrum and its reflection. Its not a photo of a double ring rainbow as in a double rainbow there would be a..." | Read more » almost 8 years ago
viechdokter "Hi Warren, thanx again for your input. Next time we get some sun I will try to work with reflective surfaces to reduce overall light intensity to a..." | Read more » almost 8 years ago
viechdokter " Here is an overlay of the curves. " | Read more » almost 8 years ago
viechdokter "Hi Warren, thanx again for your input. I meanwhile found the problem: the double-sided tape that was supposed to hold the camera in place just stuc..." | Read more » almost 8 years ago
viechdokter "You are right about the cut-off of the picture. Iwill try to work around it.Problem is, the camera already is in the lowest possible position. I co..." | Read more » almost 8 years ago
viechdokter "I meanwhile tried to "straighten up" things a bit in the setup (although the velcro tape is not very helpful for small adjustments - perhaps one co..." | Read more » almost 8 years ago
viechdokter "And here is the proof that the camera works: " | Read more » almost 8 years ago
viechdokter "Hi Warren, first of all thank you for your help. Here are a few images of the setup: " | Read more » almost 8 years ago
viechdokter "Here is the spectrum: https://spectralworkbench.org/spectrums/75504 I wonder if I have put in the DVD-grate the wrong way round or something. I..." | Read more » almost 8 years ago