35mm slide mounted polarizer

 

Reflecting about 75% and transmitting about 25%.
Color changes between blue and gold depending on angle.
Very cool to experiment with.

Set contains 6 unmounted 2 inch by 2 inch color filters.
Cyan, Magenta, Yellow, Red, Green and Blue.
 

High precision front surface mirror.
Great for use on galvos for home-made laser demonstrations.
(view larger image to see spec. details)

30x28mm mirrored filter / beam splitter
 

Set contains 4 unmounted 2 inch by 2 inch diffraction gratings.
2- double-axis 532 lines/mm & 2-linear 1000 lines/mm.