Captive Polarizing Filter Frame and Case

Small kit of filters to play with lasers, polarized light, photoelasticity, and diffraction gratings.The filter frame holds a captive 80x80mm bare polarizing filter, which makes it easier to handle without smudging or scratching it. The filter is taped onto the print midway through using a preprogrammed pause at the right layer, and when the print resumes it builds over the filter by a few mm, trapping it in place.The box holds 2 of these filters + 2 diffraction gratings, and has slots to position the filters for some common experiments involving polarized light and lasers. The photos show using 2 filters to view stresses in clear plastic, demonstrating the polarization of a red laser pointer, using the same optically active plastic to pass a laser through 2 opposing polarizing filters, and showing how a diffraction grating splits different wavelengths of light at different angles. You can use the last behavior to measure the wavelength of your laser pointers!The lid slides on snugly w