Pressure actuated light pen

Details Pressure actuated light pen Pressure actuated light pen

G - Physics

06

F

375/38, 88/97.7

G06F 3/14 (2006.01) G09G 3/00 (2006.01)

Patent

CA 1058783

Abstract of the Disclosure A pressure actuated light pen attached to the end of an optical fibre bundle has a retractable shutter mechanism at its forward end. The shutter mechanism comprises a plurality of wedge-shaped sections, resiliently urged in a forward direction to at least substantially close off light admittance, and moveable rearwards along inclined paths to produce an aperture at their forward ends, the light pattern at the aperture focussed on the ends of the fibres. - i -

276793

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