Lenslet Arrays are used for a directional reflection of light or laser beams to create a defined constant or transient light pattern. Hence requirements on form and surface finish are very high. By using ultra-precision machine tools and spindles, natural diamont tools and complex machining methods lenslets can be machined with a form accuracy of below 50 nm and a surface finish of under 5 nm Ra.

Precitech, Vision Research and Levicron together set up a lenslet creation process toegther with a high-speed camera system to see details of how chips are removed. For the second video the spindle spins with 60.000 rpm, means 1.000 Hz, wehre the camera was working at 1.000 fps. For the viewer the tool doesn’t seem to rotate as rotation and the fps rate was perfectly synchronized.