OPT-59 Diffraction Grating Slide

It comprises of a card mount which is 90 x 40mm approximately, with three 16 x 9mm apertures.

Each of these apertures contains a diffraction grating replica.

The gratings are of 100 lines / mm, 300 lines/mm and 600 lines /mm respectively.

They are protected by cover glasses.

Card mounts with single aperture are also available