Optically Worked Double Concave Glass Lens, 75mm Diameter, 100mm Focal Length Subcategory_Rubber Tubing the optically worked beveled edges

the optically worked beveled edges widening the visible lateral shift in refraction-angle demos

fluid reservoir

Removable full-term fetus in a 16

Double extra-dense flint glass prism at 1

Eisco Labs borosilicate glass has the following heat tolerances: Strain Point 515°C | Annealing Point 565°C | Softening Point 820°C

Optically Worked Double Concave Glass Lens, 75mm Diameter, 100mm Focal Length Subcategory_Rubber Tubing the optically worked beveled edgesDesigned for strong divergence demos, a 75mm aperture double concave glass lens at 100mm focal length spreads light through optically worked surfaces and ground polished edges.