I made short throw projector stand for Anker Mars II : r/projectors
World's shortest throw detachable lenses for high-brightness projectors - Visual System Solutions | Panasonic Business
Free-Form Mirror and Deflection Technology for Ultra-Close-Range Projection | Global | Ricoh
NEC WT600 Ultra-Short Throw Aspheric Mirror DLP Projector / Projection System | #272 SMARTBoard Electronic Whiteboards, Projectors, Screens, Home Theater Audio/Video and Night Club Item Liquidation | K-BID
Design and engineering verification of an ultrashort throw ratio projection system with a freeform mirror