| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Tom, How did the CFL lines drop off in your earlier spectra? I have noticed that my spectral images taken with P&S and DSLR cameras do not reco..." | Read more » | almost 12 years ago | |||
| Tom_H | "Chris, How did you overlay the spectral image on the Excel graph? There is another way to extract data from the camera image: Use a software that..." | Read more » | almost 12 years ago | |||
| Tom_H | "Good job. I am inspired to work on a similar project. I love the way you recycle what most see as junk! A man after my own heart. I made a spect..." | Read more » | almost 12 years ago | |||
| warren | "Wow, i did not regret that. " | Read more » | almost 12 years ago | |||
| cfastie | "You tell me. " | Read more » | almost 12 years ago | |||
| warren | "If i watch the video, will I know why the post is named "Ebert"? " | Read more » | almost 12 years ago | |||
| straylight | "rather nice. I need to lift my game ! :) " | Read more » | almost 12 years ago | |||
| gonzoearth | "It looks awesome. I look forward to trying lots of these tweaks! " | Read more » | almost 12 years ago | |||
| Tom_H | "The basic grating equation works for transmission as well as reflection. The sign conventions can throw you though. One purpose of the collimatin..." | Read more » | almost 12 years ago | |||
| liz | "This is amazing! I also like Dan Beavers graphic :) " | Read more » | almost 12 years ago | |||
| cfastie | "Yes, now I have it. When the entrance slit is rotated the rectangular spectral image turns into a parallelogram. It seems to get compressed vertic..." | Read more » | almost 12 years ago | |||
| danbeavers | " I hope this illustrates what I mean. " | Read more » | almost 12 years ago | |||
| cfastie | "Tom, The Jobin Yvon tutorial describes reflection gratings, and I don't know enough to apply those rules to our transmission grating setups. The ma..." | Read more » | almost 12 years ago | |||
| danbeavers | "Chris, I am referring to the rotational alignment between the slit axis and the grating's ruling. What is the effect when the angles are rotated? " | Read more » | almost 12 years ago | |||
| cfastie | "Dan, I don't know what you mean by slit to grating angle. Angle g? Tom, I am reading now! " | Read more » | almost 12 years ago | |||
| Tom_H | "Great job! An optical bench from Legos --- super! Yes there are a lot of variables at work here. If you want to bend your mind a bit, read some of..." | Read more » | almost 12 years ago | |||
| danbeavers | "Great investigation! Another question is slit to grating angle. What effect does that have? What are the symptoms of misalignment? " | Read more » | almost 12 years ago | |||
| cfastie | "Jeff, Really good questions. I don’t think I can answer any of them from first principles. Focusing the image of the spectrum is one of the inscru..." | Read more » | almost 12 years ago | |||
| warren | "Oh, almost forgot my other question! Do the camera lens and aperture make any difference at all? You didn't use a camera for this... could you try ..." | Read more » | almost 12 years ago | |||
| warren | "Amazing. Two questions: does the distance between the camera and the grating affect focus? if we assume that for the design of a compact/useful s..." | Read more » | almost 12 years ago |