Boing Boing on MSN4d
Hidden for 175 years: Photographer's mysterious "witch mirror" 3D self-portrait emerges
French photography pioneer Charles Nègre created a 3D self-portrait using a "witch's mirror" - a clever piece of 19th-century ...
Nature14y
Adaptive optics kits, tabletop deformable mirrors and more
The Hi-Speed DM37 deformable mirror from Alpao (Biviers, France) has a clear aperture of 7.5 mm but a large stroke of more than ±35 μm for astigmatism and focus wavefront correction ...