Comments

Author Comment Last activity Moderation
warren "Hi, Will -- sorry for the slow response, a lot happened (not least the Barnraising). Yes, there IS an onramp for first time code contributors! We'..." | Read more » over 7 years ago
warren "Great idea to constrain and track this down -- it might make a good new question in its own right, esp. if it's a common issue (which seems likely)..." | Read more » over 7 years ago
stoft "No I don't think it is just inherent in the camera. The blue led has a fairly narrow spectrum (say 25nm at most) so producing a 150nm 'spread' woul..." | Read more » over 7 years ago
xose "Hi there! I've been trying to use the spectralworkbench with IOS with no success using Browser app. That web browser is suupposed to use WebRTC but..." | Read more » over 7 years ago
warren "OK - i guess the blue bulge is just a limitation of the camera... i had forgotten exactly. But if you subtract a baseline reading from any readings..." | Read more » over 7 years ago
pablo "I've focuses to 22cm, removed blue LED: https://spectralworkbench.org/spectrums/91509 The blue hump is still there. I'll try to change the DVD to ..." | Read more » over 7 years ago
warren "I think the blue hump was something we saw a lot on those SYBA webcams, and believe it was related to a blue LED in the webcam itself, which you ca..." | Read more » over 7 years ago
stoft "I note that 1) your spectrum does "fit" though it is 2) "offset" a bit from center which is likely related to the angle. (Just to identify what is ..." | Read more » over 7 years ago
warren "I think you can use this old focus tutorial and do it empirically: https://publiclab.org/wiki/dsk#Unscrew+the+lens+and+remove+the+infrared+filter ..." | Read more » over 7 years ago
pablo "Thanks @stoft and @warren. I've left the DVD as it was in spectrometer v2.0 (test: https://spectralworkbench.org/spectrums/91439) and it works. No..." | Read more » over 7 years ago
warren "Oh, that's great to hear. Good luck and we'll talk soon i hope! " | Read more » over 7 years ago
bkleist "@warren, I have gotten ahold of Dr. Pierce, and he said that the camera has come in, and is ready to be deployed!!! We are hoping to set it up as s..." | Read more » over 7 years ago
liz "Thanks @zega! " | Read more » over 7 years ago
liz "This is so neat! " | Read more » over 7 years ago
stoft "The angle is a function of (mathematical) of the detectable wavelength range and the diffraction grating (DVD) line spacing. My calculations and my..." | Read more » over 7 years ago
eustatic "@eustatic awards a barnstar to stevie for their awesome contribution! " | Read more » over 7 years ago
warren "@stoft or @cfastie may be able to provide more info, but I believe it's been shown that the exact angle is not as important within the likely resol..." | Read more » over 7 years ago
pablo "Thaks, Jeff. I'll try to use a wooden block with a hole in it, or made with pieces to allow the cable to pass. I'll keep distance and height from t..." | Read more » over 7 years ago
eustatic " " | Read more » over 7 years ago
eustatic "very fun! thanks, jeff for your innovative intragram layout work " | Read more » over 7 years ago
warren "Hi, sorry, we linked it to another page -- should perhaps make it more prominent; there's a link leading to the new location here: https://publicl..." | Read more » over 7 years ago
warren "Hi, Pablo - I think you can leave the DVD as it is, and the challenge will be to get it to remain in the same orientation with regard to the slit, ..." | Read more » over 7 years ago
dcchallener "Where is the video to assemble the box? " | Read more » over 7 years ago
stoft "@stef, thanks for the curve data. While the data is useful for comparison with relative sensitivity curves of other cameras, the data, unfortunatel..." | Read more » over 7 years ago
mathew "Also Autodesk Recap 360 and ReMake " | Read more » over 7 years ago
geography76 " 32 crawfish heads " | Read more » over 7 years ago
geography76 " " | Read more » over 7 years ago
warren "Hi, this looks very cool - what is the app you're using? " | Read more » over 7 years ago
david-days "Poor phrasing on my part--it's not that you can "use QR code processing", but I believe that similar techniques will help identify the region of in..." | Read more » over 7 years ago
stef " khufkens-pi-camera-response-curves-3342e29_-3-.zip @warren,@stoft This may provide additional info. Stef " | Read more » over 7 years ago