About this 3D model

This is an OpenSCAD design of a ring to hold samples for light soaking in a solar simulator. Print and attach sample with binder clips and hold with chemistry clamp as in photo. This component is part of the [Open-source optics project](http://www.appropedia.org/Open_source_optics), whose goal is to radically reduce the cost of scientific optical hardware: by the [Michigan Tech's Open Sustainability Technology Research Group](http://www.appropedia.org/Category:MOST). For similar see the [Open-Source Lab How to Build Your Own Hardware and Reduce Research Costs](http://www.appropedia.org/Open-source_Lab)