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Question: curved grating

DarkGreen is asking a question about spectrometer: Follow this topic

by DarkGreen | March 29, 2015 03:33 | #11730

so... I use a blank DVD-R, and ofcause that makes the grating curved.

Are there any software for correcting that?

Another thing. Does it mattitr if the grooved side of the DVD is towards the incident light or not?



Hi, DarkGreen - we had worked on removing curvature but the guy working on that project left, so no progress recently; for a single cross section of the image, however, it doesn't much matter. As to the grooved side or not, I'm not sure but @cfastie posted an article which may have some clues, especially in the long comments section: http://publiclab.org/notes/cfastie/2-12-2013/grating-angle-dvdr

This post by @MrBumper may also hold some useful information: http://publiclab.org/notes/MrBumper/01-11-2015/preparing-a-dvd-r-to-act-as-a-diffraction-grating

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Just simply crop it to line and upload it manually.

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