| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | " Right ... the optical distances are very small ;-) which is why mechanical rigidity is so important ... (think of the 'optical bench' which is mad..." | Read more » | over 5 years ago | |||
| jenjimah | " ^^^ I just realized you were referring to line spacing in microns, not lines/cm! Now it makes sense. " | Read more » | over 5 years ago | |||
| jenjimah | "Also - I like the idea of microscope slides, except that glass strongly absorbs UV <400nm. I'm not sure of how well the pi NoIR is on that range..." | Read more » | over 5 years ago | |||
| jenjimah | "Yes, so far I'm trying to accomplish all those 3 points. As for the slit, I made it from a razor blade so it should fulfill the criteria. I compare..." | Read more » | over 5 years ago | |||
| stoft | " A while back I experimented with some 35mm 'slide-mount' holographic grating film (I believe it was 1200) vs the DVD (which is 740). The diffracti..." | Read more » | over 5 years ago | |||
| jenjimah | " Thanks for the feedback, and for the equation. That's super helpful. I asked the PublicLab when I ordered my kit regarding the diffraction lines/i..." | Read more » | over 5 years ago | |||
| stoft | " Looks like a nice clean construction. The glue should help mechanical stability. I did notice the swap from DVD to what appears to be a film holog..." | Read more » | over 5 years ago | |||
| warren | " Here's the 3d model for the adapter for the alternative "wider flange" webcams -- @Bronwen : https://github.com/publiclab/community-microscope/bl..." | Read more » | about 6 years ago | |||
| warren | "This is really great feedback, and excellent for others looking to assemble the kit. Great work, and thanks for sharing, Carl! On Thu, Oct 11, 201..." | Read more » | about 6 years ago | |||
| warren | "These are great questions!!! I think DVDs are consistent but have no evidence to support it. I do think they're close enough for your spacer idea t..." | Read more » | about 6 years ago | |||
| carlcrott | "More questions: 1) Are DVD diffraction angles consistent? Could a spacer be designed that would correctly orient the camera with precision + repea..." | Read more » | about 6 years ago | |||
| aga | "Are there any cut out templates for the card papers used in this design? " | Read more » | about 6 years ago | |||
| happywheelsgame | "http://happy-wheelsgames.com Hope that the site will be on top, to get more players and help people enjoy after the days tired. " | Read more » | about 6 years ago | |||
| carlcrott | "@warren I did a few things differently: I opened up the webcam + stripped it of its black plastic housing I left the DVD in the freezer overnigh..." | Read more » | about 6 years ago | |||
| warren | "Hi! Sorry u had trouble... We've found that some DVDs (even in the same batch) are much harder than others for reasons we don't understand. Did you..." | Read more » | about 6 years ago | |||
| carlcrott | "Prepping the DVD is a HUGE pain. Tried: Xacto knives Duct tape ( works but leaves residue ) Sticking it in the freezer Super glue doesn't work. T..." | Read more » | about 6 years ago | |||
| warren | "I think the best method I've seen is to actually assemble it and loosely attach the cover. Then see where the spectrum falls on the screen. You can..." | Read more » | over 6 years ago | |||
| khov | "Does anyone have some helpful advice on how to make sure the angles are right? I am using a usb camera, which means I had to add an aditional layer..." | Read more » | over 6 years ago | |||
| khov | "Hey! Before you tape the bit of DVD into your spectomoter, make sure that you soak the purple dye out and avoid leaving fingerprints. Here is a hel..." | Read more » | over 6 years ago | |||
| pmvecc | "@warren cool, I ordered a lego kit last week so once it arrives I will be happy to try and figure something out! " | Read more » | over 6 years ago | |||
| warren | "I think that's a great idea -- perhaps if you develop a prototype lego attachment we could offer this as an add-on? Want to give it a try? On Wed,..." | Read more » | over 6 years ago | |||
| pmvecc | "Could a fiber optic coupling be added to the spectrometer by an end-user so that it can be used in, for example, flame photometry or laser-induced ..." | Read more » | over 6 years ago | |||
| xose | "Hi @zixaq I've done this before using Raspberry pi 2b and the original raspberry pi camera V2. What I've found is this: 1. Some people recommend to..." | Read more » | over 6 years ago | |||
| warren | "aha, I guess I'm wondering if it's possible to just tape over the red LED -- but in future versions we can integrate that setting for sure -- we'll..." | Read more » | over 6 years ago |