Oa-6 Corner Reflector
Published: Wednesday 15 March 2006 - Updated: Monday 28 March 2011
To demonstrate a retroreflector.
3 Mirror corner
Click on pictures to enlarge.
The three mirrors arranged to have three mutually perpendicular faces have the property of being retrodirective; i.e. it will reflect all incoming rays back along their original directions. when viewed from any angle the image of the observer always appears at the vertex of the three mirrors. Alternatively a laser beam directed to the reflector comes straight back. A cloud of chalk dust makes the beams visible to the class.