| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Also see some of the suggestions here, which experiment with interior rigidity as well: https://publiclab.org/notes/ygzstc/08-19-2015/some-suggesti..." | Read more » | over 8 years ago | |||
| stoft | "@viechdokter, yes, it was just an experimental baffle for stray light. Keeping reflections low inside the space between slit and grating is necessa..." | Read more » | over 8 years ago | |||
| viechdokter | "The little thing with the hole in front of your DVD - is this for preventing stray light coming in? " | Read more » | over 8 years ago | |||
| warren | "I frequently have laser-cut acrylics made, in lots of several hundred, and the simplest ones are still about $3.50 each -- the process is not cheap..." | Read more » | over 8 years ago | |||
| stoft | "You mean something like this? (from https://publiclab.org/notes/stoft/03-02-2015/plab-3-spectrometer-upgrade-prototype): Yes, mine could be simp..." | Read more » | over 8 years ago | |||
| viechdokter | "So... how about turning the (DVD holding) paper thing around and create a paper housing all around the wooden block with a parallel surface, a rect..." | Read more » | over 8 years ago | |||
| stoft | "I believe the configuration with 45 and 20 deg was extracted from physically experimenting on the first PLab design. ( I think they were having dif..." | Read more » | over 8 years ago | |||
| viechdokter | "PS: I guess if you use acrylic you need a real dull black finish to prevent stray light. PPS: when I thought about a new setup I also came to a "C..." | Read more » | over 8 years ago | |||
| viechdokter | "Hi Chris, do you mean "sit flush" as in "parallel", "pressing tightly against it"? I thought you had a good reason for the 20° angle between DVD a..." | Read more » | over 8 years ago | |||
| stoft | "Hmmm... a few counter thoughts. 1) To match the camera optics with the grating to keep the spectral band spread across the pixels seems to require..." | Read more » | over 8 years ago | |||
| warren | "Awesome! I did some sketches for a multiple piece outside enclosure that could be prototyped in cardboard but final cuts in laser cut acrylic: L..." | Read more » | over 8 years ago | |||
| viechdokter | "Sorry about the typo. I meant "You could build this from wood or ..." " | Read more » | over 8 years ago |