Periscope – Fun Optics Experiment

Ever wondered how submarines see above the water? Build a real working periscope using two mirrors and a 3D printer and explore how mirrors redirect light! Most parts print without supports; only the main tube requires a small amount of supports. This model demonstrates how light reflects at 45° angles, allowing you to see over obstacles — the same optical principle used in classic periscopes. The included OpenSCAD file (Customize button) allows you to adjust the mirror size, tube length, and other parameters to fit your own mirrors or experiment with different periscope sizes. This periscope is not waterproof, hence it cannot be used underwater.3D Printed Parts• mirror corner modules• main tube• extension tube The tubes connect using sleeve joints, allowing the periscope to be extended (using the extension tubes).MirrorsThis periscope uses two small round, flat mirrors, positioned at 45°. (It is important that the mirror is flat.) For this model I used 50 mm acrylic mirrors, which are