Ebay Diffraction Grating 2x2" Spectroscopic Slide Model

This is a model with approximate dimensions of a 2x2" (35 mm) projector slide containing diffraction grating that can be found on ebay.
You can use this model to help you designing your spectroscope assembly.

there are various diffraction grating slides on sale on ebay
various keywords to seach for:
Beugungsgitter Linear Diffraction Grating Slide Optisches Gitter 500 lines/mm
2X Diffraction Grating Slide Double Axis 13500 lines/in Lamp / Laser Holographic
500 lines/mm, 1000 lines/mm

this is probably "35mm size" projector slide.
slide mount 2 inch x 2 inch
transparency film size is 24mm x 36mm (a bit smaller than 1" x 1.5")
I measured its thickness to be approx. 1.05 mm.

Use gratingSlide(); module to show the model. Uncomment $fa and $fs lines to get more round edges.

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