Lenses as retro-reflectors
{"Image DocumentName": "Lenses as retro-reflectors", "Image ImageDescription": "Angle of input. defines position in focal plane. Mirror in focal plane. converts position back to angle at output. Output angle = input angle. translations still possible.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}