| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | "Ok, if you look back up above in THIS research note, you will see an Update I have added which includes a single combined plot set using my PLab-3 ..." | Read more » | almost 9 years ago | |||
| stoft | "Yes, the Solux4700KSpectrum file contains Solux's 4700K lamp output spectrum, after a 3-5min warm-up period +/-200K on the center color temperature..." | Read more » | almost 9 years ago | |||
| stoft | "Sure; they are just different file types (content). Initially, for testing, there could be just one "default" selection with buried data as a proof..." | Read more » | almost 9 years ago | |||
| stoft | "I used the 35W Solux 4700K. eg: http://www.amazon.com/35003-Daylight-Halogen-Degree-Kelvin/dp/B0002GS4GE/ref=sr_1_2?s=hi&ie=UTF8&qid=145202..." | Read more » | almost 9 years ago | |||
| stoft | "The correction data is in a CVS file and the Solux data is in a TXT list file -- both with 2 columns (nm,value). The data should remain in this (nm..." | Read more » | almost 9 years ago | |||
| stoft | "Jeff - Yes, it may be possible (with some modifications) to use your new feature code for a 'default' gain correction. Also recall my later researc..." | Read more » | almost 9 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 » | over 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 » | over 9 years ago | |||
| stoft | "How about just a partial 'fade-out' of the graphics plot range below 400nm and above 650nm (darkened / subdued colors) and then activate a text not..." | Read more » | over 9 years ago | |||
| stoft | "Might be helpful to post the topic in the PLab Spectrometer Google groups where you can get a wide range of feedback. Briefly, I'm not clearly foll..." | Read more » | over 9 years ago | |||
| stoft | "Whatever the reference source, that spectral response curve needs to be saved in SWB. Also, as in another SWB issue I filed, SWB data should be tra..." | Read more » | over 9 years ago | |||
| stoft | "Jeff, yes I think there were a couple attempts to 'correct for non-linearities' using polynomial curve-fit functions. They assumed there was some h..." | Read more » | almost 10 years ago | |||
| stoft | "Yes, CIR, CCT and other lamp descriptions make knowing what you really get sometimes rather difficult. I have just added a section about calculatin..." | Read more » | almost 10 years ago | |||
| stoft | "This was the Sanm camera of the PLab 3.0 + my own upgrade. No blue-film on the DVD and no IR filter. While removing the IR filter from webcams does..." | Read more » | almost 10 years ago | |||
| stoft | "You might then also consider a u-ch shape for the camera block. That would nicely control the exact spacing between camera and DVD which is importa..." | Read more » | almost 10 years ago | |||
| stoft | "1/4-in thick pieces make it easy to assemble things square and the glue results are strong. Hardwood is rigid and handles machining better. I start..." | Read more » | almost 10 years ago | |||
| stoft | "Thanks; interesting thoughts. Yes, digital cameras can have white balance settings which create a general shift in the RGB output ratios, but the S..." | Read more » | almost 10 years ago | |||
| stoft | "Thanks. Yes, the camera has virtually no relative sensitivity outside 400-700nm. This does need to be differentiated from observing a bright source..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 7: Gain-Correction: After some experimentation ( http://publiclab.org/notes/stoft/02-25-2015/plab-spectrometer-gain-correction ) it looks pos..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 6: Toggle RGB: Just a small bit -- the initial 'combined' spectral plot is 'white' to differentiate from the RGB plot colors .... but when to..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 5: Calibrated wavelength Data: I did two sets of measurments with PLab3.0 and, therefore, two separate calibrations. While the # of data poin..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 4: Calibration points: The calibration procedure is presently based only on the CFL Blue and Green peaks but because of distortions in the ty..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 3: PLab 3.0 on Android: I attempted to use SWB on a Galaxy S4 with the PLab 3.0 connected via the USB port -- which would allow using the PL..." | Read more » | almost 10 years ago | |||
| stoft | "Issue 1: Set curve downloads There is a selection of file types for a single curve plot data download but that option is not available for a displa..." | Read more » | almost 10 years ago |