Comments

Author Comment Last activity Moderation
stoft "Unfortunately, LED wavelength does not change with applied voltage or current -- their center peak wavelength is not variable or controllable and P..." | Read more » over 8 years ago
stoft "Sure ... what's the LED's packaging style/type? SMD, leaded, ...? " | Read more » over 8 years ago
stoft "Jeff, I did a few quick tests and added an "Opacity" section above. While more observations are needed, these limited results are interesting. " | Read more » over 8 years ago
stoft "Thanks; good comments. 1 - Dilution: I updated the note to clarify that the larger signals were only attenuated to better match the range of the w..." | Read more » over 8 years ago
stoft "Yes, I understand the wish for simple, cheap and insensitive to construction or handling -- but I'd like to propose some alternative, yet associate..." | Read more » almost 9 years ago
stoft "Thanks - Lots of great feedback. - First, remember that we are dealing with light with extremely short wavelengths -- which is why most optical exp..." | Read more » almost 9 years ago
stoft "They look good in the pic. It is difficult to get a ideal gradients with actual dots or lines. You might try attenuating the florescence light vs l..." | Read more » over 9 years ago
stoft "btbonval - point taken, centriod is for 2D; their line just represents the 'center of distribution' " | Read more » over 9 years ago
stoft "btbonval - true. I was just suggesting a fast integer approximation as a simple means to test and get a 1-number result. The existing work in patte..." | Read more » over 9 years ago
stoft "I think the term you are looking for is the "centroid" -- think of it as the point where the shape/volume/whatever would be physically balanced -- ..." | Read more » over 9 years ago
stoft "Looks promising. Maybe these are obvious but... - Pick 3-5 oils, or oil mixtures, as a reference test set -- low to high density -- then use them f..." | Read more » over 9 years ago
stoft "Jeff, nice experiment. Yes, UV is the right choice -- the shorter the wavelength the better. I'm assuming that the UV-light 'reference' was with wa..." | Read more » over 10 years ago