Diffraction Grating sheet 1,000 lines/mm Linear 5 Foot x 6 Inches Wide

This actually worked out really well. Try to avoid touching it as fingerprint oils can fill in the fine grooves in the diffraction grating (which would make that spot work more like clear plastic than prismatic diffraction material). I used this (along with card stock) to make a large diffraction grating for use in front of gas tubes to show the emission lines. It came in a roll which was then packed in a bag -- no wrinkles, creases, etc. (I suspect some reviews are for the single sheets vs. the roll.)

I bought this after a science class project where we learned about stars and how we can tell what gasses are in the stars using diffraction to separate the light spectrum into its separate components. I don't know if this material can actually do that same thing, but either way it was a fun buy and I made lots of fun projects like glasses, a computer case side panel, and others. Even if it's not the same scientific material that inspired me to originally purchase this item, it's been fantastic.

Very small. It's wrapped around itself to the diameter of a dime, no cardboard center.

Have not used it yet for my project, but tested and works well.

High quality diffraction grating. Shows line emission spectra clearly. Helpful tip: When using, wear gloves or minimize handling with naked fingers, as oils from your skin will negatively impact the grating. It is still definitely usable with finger-oils, but the aesthetics of the grating look 'dirty'.

While this was not what I thought I was ordering, the fault is mine in that regard. I thought I was buying the dual axis diffraction film, but I now realize that the "linear" in the title means that it only diffracts across a single axis. This made it unsuitable for the art project I had in mind. However, even if it *had* been dual axis, I found that the high density of lines on this film also worked against me. I thought that 1,000 lines/mm would lead to a more stunning effect than the 13,500 lines/inch glasses I had previously experienced, but I now plan to order the latter density in dual axis. I don't know whether this truly merits docking one star, because the product is exactly as described and phenomenal at doing what it is advertised to do, but I feel that those who wish to use it for purposes other than scientific demonstration need indicators that there are better options.

Great product and works as expected. I'm using it to produce some light art.

Very fun to work with, be careful not to get it dirty as I've yet to figure out a way to clean it...

Die Folie ist das was beschrieben ist, und damit kann man sich ein Spektroskop basteln. ACHTUNG! Es gib vom selben Versender auch Beugungsgitterfolien, die nicht linear polarisieren, also nicht für Basteleien wie ein Spektroskop taugen. Die taugen aber für sehr schöne Regenbogeneffekte, wenn man sie in Fenster klebt.

il prodotto lo utilizzo per fabbricare uno spettrografo ed ha assolto appieno alla sua funzione di diffrangere la luce nel suo spettro

Thank you!

At first it did not arrive but after some very pleasant contact with their Customer Service they sent a new one and now I have it. It looks and feels like great quality. I highly recommend 10/10 both on the product and the customer care!

Pacco arrivato in ritardo e senza alcun preavviso del mittente. Con questa pellicola si vede sufficientemente la diffrazione della luce, la pellicola è anche troppo sensibile...