intensity-calibration
intensity-calibration


Author Comment Last activity Moderation
B-winters "Stef, thanks for your interest, I have some new updates and they can be found in this open-source publication: https://doi.org/10.1016/j.ohx.2021.e..." | Read more » 11 months ago
stef "@realestateediary Are there any further updates to this design? Re the razor slit or any geometric changes? I am very much interested in printing t..." | Read more » 11 months ago
WendyJospeh "It is a good effort by you. " | Read more » almost 2 years ago
EllenHarri "Wow, Good Project " | Read more » almost 2 years ago
B-winters " If you are interested in getting access to the original CAD files, they are available for use on www.onshape.com under the file name "Visible Spec..." | Read more » over 3 years ago
B-winters " chunbr, thanks for you interest. I apologize for missing your comment and questions, I have been exploring some new adaptations to this system tha..." | Read more » over 3 years ago
chunbr " I did this! Use 25.103 as the multiplier to scale the .stl file to the proper size in Cura and also the diffraction gradings are available on Amaz..." | Read more » almost 4 years ago
chunbr "I did this! Use 25.103 as the multiplier to scale the .stl file to the proper size in Cura and also the diffraction gradings are available on Amazo..." | Read more » almost 4 years ago
chunbr "I made this! The print took about 36 hours and Amazon sells $12 diffraction slides. The .stl files aren't scaled properly when imported to Cura, bu..." | Read more » almost 4 years ago
stoft "Ah, good. Glad you could view the additional data and figured it out. " | Read more » almost 5 years ago
Tehnicni "How a stupid mistake. I checked linearity of all 3 cameras at three points, thinking that it have an exponential dependency, which is not true, the..." | Read more » almost 5 years ago
stoft "Yes, clearly all but the last image shows compression in the Green (and Red though less). Because the process of spectral data from a webcam does n..." | Read more » almost 5 years ago
Tehnicni "I also tried the third webcam, cheap Chinese. White Balance: R and G at max, B in the middle. Gama 2, Exposuer manually Measured at different..." | Read more » almost 5 years ago
stoft "The camera's I've used seem different in this effect but you might try to hunt down the technical data sheets from the Mfg -- sometimes they have a..." | Read more » almost 5 years ago
Tehnicni "I'm using wery old cheap webcam with all controll on manual and get same result with Logitech C525 also in manual mode. I checked lineariti on all ..." | Read more » almost 5 years ago
stoft "@Tehnicni, I'd agree that any detector-specific non-linearity is likely very small compared with the effect you've presented. I'd guess the more li..." | Read more » almost 5 years ago
Tehnicni "Question for @stoft. According to my measurements, the CMOS sensor has some sort of blooming effect before saturation. I tested my webcam with whit..." | Read more » almost 5 years ago
rthalman "Ok, so here are the links to shapeways: Absorption Cell Body: https://www.shapeways.com/model/3dtools/5722864/0/123?key=0955c52c1c8596f6422b736ebda..." | Read more » over 5 years ago
warren "Also see this one: https://publiclab.org/notes/briandegger/12-11-2015/silhouette-cut-public-lab-mobile-spectrometer-v2 -- though it's not too flesh..." | Read more » over 5 years ago
warren "Wow, excellent! You can share a design on Shapeways by clicking "Edit product with this model" in the upper right: Then you can check "Offer for..." | Read more » over 5 years ago
stef "@warren, @rthalman I will share the build details once I get some fotos. The public library operates on a cost recovery system so the cost of the p..." | Read more » over 5 years ago
rthalman "@warren I have the .stl files in the description, you can upload those to Shapeways. In PLA on shapeways the absorption cell body costs $26; the Sp..." | Read more » over 5 years ago
warren "Also, is it possible to order this print on Shapeways, do you think? I'd love to get one but don't have a 3d printer. Anyone want to try uploading ..." | Read more » over 5 years ago
warren "This is so exciting to see. @stef, would you be willing to post a response using the "Document your attempt to build this" button above the builds ..." | Read more » over 5 years ago