Optical: systems and elements – Deflection using a moving element – By moving a reflective element
Patent
1998-06-23
2000-10-10
Spyrou, Cassandra
Optical: systems and elements
Deflection using a moving element
By moving a reflective element
359231, 359290, 359293, 359572, 359573, 359900, G02B 2600, G02B 518
Patent
active
06130770&
ABSTRACT:
A grating light valve is configured to either reflect or diffract an incident beam of light from a light source. Each grating light valve includes a plurality of deformable reflective ribbon structures. Preferably, the grating light valve is located within a vacuum chamber. A directable low power electron gun is also positioned within the chamber. To form an image the gun is scanned across an array of grating light valves and selectably irradiates predetermined ones of the ribbons to charge each such ribbon to a predetermined level. Depending upon the amount of charge so deposited onto the ribbon, it will deflect a predetermined distance toward an underlying substrate. The ribbons are preferably erased in one of two ways. According to the preferred embodiment, each ribbon includes a path of impedance to allow the charge to bleed into the substrate. The impedance is selected to discharge a fully charged ribbon in a period of a single frame. Alternatively, the electron gun can be used to generate high energy electrons. Upon impinging a ribbon a single high energy electron will cause the ribbon to emit more than one secondary electron. By applying a sufficient number of these high energy electrons, the charge on a ribbon can be removed.
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p
Jr. John Juba
Silicon Light Machines
Spyrou Cassandra
LandOfFree
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