| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| 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 | |||
| warren | "OK, while we're tackling some of the discussion of gain correction in https://publiclab.org/notes/stoft/02-25-2015/plab-spectrometer-gain-correctio..." | Read more » | almost 9 years ago | |||
| warren | "Ah yes, re: multiplicative. Luckily there's an as-yet hidden feature called blend: which is like subtract, but which allows any arithmetic combinat..." | 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 | |||
| warren | "Hi, Dave - I'm circling back because I believe the new subtract: feature in Spectral Workbench 2.0 could enable you to do a standard gain correctio..." | Read more » | almost 9 years ago | |||
| warren | "While it continues to be an evolving prototype, the new Subtraction tools in Spectral Workbench 2.0 (preview) allow for subtraction of one spectrum..." | Read more » | about 9 years ago | |||
| coccos | "This project might be of interest for finding a solution for the calibration problem: https://jethomson.wordpress.com/spectrometer-articles/how-to..." | 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 | |||
| warren | "Hmm... I'm wondering what the right graphical indicator for lower dynamic range at the outer edges of the spectrum should look like. " | 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 | |||
| Mikebutler524 | "I'm looking for help using a solar spectrometer to gain current incident light values as a base to adjust my reflected image taken in a high qualit..." | 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 | |||
| warren | "There's been a good parallel discussion of the need for this here: https://groups.google.com/d/msg/plots-spectrometry/ZtLXALzz4Us/F_nXP5sc6TgJ I p..." | Read more » | over 9 years ago | |||
| warren | "adding a solar spectral correction into SWB YES! I'm finishing up some MapKnitter work next week, and debugging today and tomorrow, but would love..." | Read more » | over 9 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 » | over 9 years ago | |||
| MrBumper | "Sigh! well I wondered why I hadn't come across 'daylight' halogen before. It's cos they don't seem to be available in the UK, at least the Solux la..." | Read more » | over 9 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 » | over 9 years ago | |||
| MrBumper | "I've just looked at the Solux lamps. As far as I can see they are halogen lamps with built in blue filters. What a great find. I've tried daylight..." | Read more » | over 9 years ago | |||
| MrBumper | "This does look very promising. How was your spectrometer set up - blue dye removed from DVD-R grating ? (assuming you used a DVD-R), IR filter remo..." | Read more » | over 9 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 » | over 9 years ago | |||
| MrBumper | "I'm wondering if you took any account of the web camera settings - in particular colour temperature / white balance. This has quite a large effect ..." | Read more » | over 9 years ago | |||
| mathew | "my experience has been similar-- just because a very bright source in the 800-1000nm range can be detected doesn't mean that we can trust the sensi..." | Read more » | over 9 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 » | over 9 years ago | |||
| mathew | "This is awesome, Dave! The noise above 700 and below 400nm is substantial, but I think that just defines the usable range of the spectrometer. @w..." | Read more » | over 9 years ago |