| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Jayesh | "Hi Martin, Thanks for the description and tips. I will try to implement it and will tell you results :) " | Read more » | almost 12 years ago | |||
| mkoistinen | "@Jayesh, Hi! Re: Tips on the spectrometer. Well, I basically just made it up as I went along, guided by the fine work by the fine folks at Public..." | Read more » | almost 12 years ago | |||
| Jayesh | "Hi Martin, This is fantastic and encouraging. I am looking to build up the spectrometer like you made. Need some tips for the same. I want to get ..." | Read more » | almost 12 years ago | |||
| donblair | "Martin -- this is truly fantastic! Truly a huge leap for DIY Spectroscopy. How often do you think you'll be able to take spectra of the same batc..." | Read more » | almost 12 years ago | |||
| pluharj | "Hi Warren, that would be awesome! I have not so good results with the new camera and I cannot find similar model on local market. I will drop new p..." | Read more » | almost 12 years ago | |||
| warren | "Thanks for documenting this and I'm eager to see the new camera working... but if you have a defective camera we (the Public Lab retail team) can d..." | Read more » | almost 12 years ago | |||
| ckmurt | "one final note, my camera is facing inward in the box which seems to give it better geometry with the slit on mine. " | Read more » | about 12 years ago | |||
| ckmurt | "also it seems that there might be some problems with the calibration program. It often gives odd numbers for the wavelengths, at least for me. " | Read more » | about 12 years ago | |||
| ckmurt | "I've been tweaking the setup today, its much crisper. I think some of the noise on the blue spectrum may have been from the blue light on the webca..." | Read more » | about 12 years ago | |||
| warren | "The blue is not so bad... i think that blue peak may just be broader, see these examples: Is your bulb a "warm" fluorescent? There are mor..." | Read more » | about 12 years ago | |||
| ckmurt | "So i refocused it, this was the most recent calibration, the red and green channels are producing very clear and crisp peaks and valleys, however, ..." | Read more » | about 12 years ago | |||
| ckmurt | "Nice detective work, I'll give that a try today and see how it goes. " | Read more » | about 12 years ago | |||
| warren | "Hi, ckmurt - i double checked by going through the build process from scratch again, and you're right -- 3-5" is too close. For whatever reason it ..." | Read more » | about 12 years ago | |||
| warren | "Well, it's definitely in focus now, if that's 4". How are your spectra looking now? " | Read more » | about 12 years ago | |||
| ckmurt | "I posted a photo of the barcode at 4". I have other distances at well, its focused from approx 3-5 in. You're welcome to use this on the wiki. " | Read more » | about 12 years ago | |||
| warren | "If you have a chance to upload a photo of the barcode while it's out of the case, that can help us narrow down what's going on. Once we solve this..." | Read more » | about 12 years ago | |||
| ckmurt | "I did the IR conversion, I tried to focus it on a barcode 3" away before I assembled the kit. I will try to redo it. Will upload the pic of the lam..." | Read more » | about 12 years ago | |||
| warren | "Did you do the infrared conversion? In any case, I bet your camera is out of focus. You do need to focus it closer, whether or not you do the conv..." | Read more » | about 12 years ago | |||
| warren | "Hi! I didn't realize it was a kit -- i thought you'd built it yourself from scratch. In this case the slit is probably correct since it's been lase..." | Read more » | about 12 years ago |