Solar Eclipse Viewing Goggles

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I Created 3D Printed Eclipse Viewing Goggles to Accommodate Standard Welding Glass and Fit with Eyeglasses on. Here's How I Made Them. To View the Total Solar Eclipse, You'll Need a Pair of Specialized Goggles That Can Filter Out the Sun's Intense Light. I Designed These Goggles to Fit Standard 2”x4 ½” Welding Glass and My Own Eyeglasses Perfectly. The welding glass will snap into place with perfect accuracy, assuming your printer has similar precision as mine and the glass edges are rounded. Be sure to clean out any bugs from the track first. One thing to note is that the glass I purchased isn't cut straight on the short side – it's actually a trapezoid with a tilt of about 1.5mm, so these goggles have been modified to accommodate this. I created these using Sketchup Make 2017 and exported them as STL files, which should be compatible with any CAD program. There are two sizes available: the 150mm wide ones fit my eyeglasses perfectly, while the smaller 130mm size is designed for those with smaller heads. The head straps require no sewing – simply thread them through the slots and adjust to fit different users. To thread one end, stretch it around a target head until it's comfortable holding it at the opposite back edge, then cut at approximately 2” from that point and thread through the other slots. One end of the strap should be threaded through the front slot first, then loosely through the back slot and into the middle slot with about ¼ - 3/8” hanging inside. Pull tight to capture everything. The edge is designed to be 90mm wide, accommodating Weatherseal or any other comfort-enhancing material you prefer. To make these goggles, you'll need a few specific items: * A 3D printer capable of printing a model with dimensions 160mm x 80 x 80 and about 6-8 hours of print time * PLA filament (about 40 meters) in black – I recommend painting the inside black to prevent light from bleeding through the front curve and other areas * Radnor Filter Plate (welder’s glass), 2”x4 ½” shade 14, available at AirGas or on eBay for a much lower price than some sellers are charging * MD 3/16”-5/16” all-climate rubber Weatherseal – this self-stick material requires a little extra help from Elmer’s glue if it's old and sticky * Optional: Elmer’s glue, Craft Bond Multi-purpose spray adhesive or contact cement for added stability * Elastic strap (1” wide) about 20” long, depending on head size – you can use this from your sewing box or purchase a similar product To assemble the goggles, simply melt the plastic hold-in tabs for the glass using a soldering iron. Don't cut these off thinking they're bugs! I printed my goggles at 60mm/sec with 15% infill, 0.2mm layer height, and three perimeters, using a homemade CoreXY printer with a 12”x12”x12” build area. Your mileage may vary. The STL file for these goggles is available in two sizes: small (130mm wide) and large (150mm wide).