Liquid crystal cells – elements and systems – Liquid crystal optical element – Liquid crystal lenses other than for eyewear
Reexamination Certificate
2007-07-17
2007-07-17
Ton, Toan (Department: 2871)
Liquid crystal cells, elements and systems
Liquid crystal optical element
Liquid crystal lenses other than for eyewear
Reexamination Certificate
active
10394931
ABSTRACT:
A variable aperture stop with no moving parts is disclosed. The aperture stop comprises a first region comprising a first optically transmissive medium, a second region comprising a second optically transmissive medium, and an electro-optical structure adapted to selectively switch the second region between a first state of optical transmissivity and a second state of optical transmissivity upon application of an electric potential thereto. The electro-optical structure comprises a top optically transmissive conductor, a bottom optically transmissive conductor positioned below and parallel to the top conductor so as to define a space therebetween, the space including the first region and the second region, and an electric voltage applicator coupled to the top conductor and adapted to apply an electric voltage to the top conductor that creates the electric potential between the top and bottom conductors.An apodizable, variable aperture stop with no moving parts is also disclosed. The aperture stop comprises a conductor having a perimeter, and an electro-optical structure coupled to the conductor. The electro-optical structure defines a first region within the perimeter of the conductor and is adapted to selectively switch the first region between a first state of optical transmissivity and a second state of optical transmissivity upon application of an electric potential thereto. The aperture stop produces an aperture having variable, optically transmissive regions representing an apodization when the first region is in the second state of optical transmissivity. Methods for manufacturing both aperture stops are also disclosed.
REFERENCES:
patent: 3955208 (1976-05-01), Wick et al.
patent: 4561731 (1985-12-01), Kley
patent: 4679911 (1987-07-01), Jacobs et al.
patent: 4833314 (1989-05-01), Pepper et al.
patent: 5281797 (1994-01-01), Tatsuno et al.
patent: 5619266 (1997-04-01), Tomita et al.
patent: 5686979 (1997-11-01), Weber et al.
patent: 5847787 (1998-12-01), Fredley et al.
patent: 6577376 (2003-06-01), Shih
Switchable Window; Principal Investigators—J.W. Doane and John L. West (http://www.lci.kent.edu/researcher.html).
Polytronix, Inc. website; http://www.polytronix.com/pdlc.htm and http://www.polytronix.com/pdlc—ts.htm; Jan. 8, 2003.
The Boeing Company
Ton Toan
LandOfFree
Variable aperture stop with no moving parts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable aperture stop with no moving parts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable aperture stop with no moving parts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3807617