System and method for varying the reflectance or transmittance of light
First Claim
1. Device for transmitting light at variable intensity, the device comprising:
- a front variable polarizer, polarizing incoming light at a first selected polarization level in a first direction; and
a rear variable polarizer, optically coupled with said front variable polarizer, polarizing light exiting said front variable polarizer at a second selected polarization level, in a second direction, wherein said first selected polarization level and said second selected polarization level are substantially zero, when no substantial electric power is applied respectively, to said front variable polarizer and said rear variable polarizer.
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Abstract
Device for transmitting light at variable intensity, the device including a front variable polarizer, polarizing incoming light at a first selected polarization level, in a first direction and a rear variable polarizer, optically coupled with the front variable polarizer, polarizing light exiting the front variable polarizer at a second selected polarization level, in a second direction, wherein the first selected polarization level and the second selected polarization level are substantially zero, when no substantial electric power is applied respectively, to the front variable polarizer and the rear variable polarizer.
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Citations
125 Claims
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1. Device for transmitting light at variable intensity, the device comprising:
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a front variable polarizer, polarizing incoming light at a first selected polarization level in a first direction; and
a rear variable polarizer, optically coupled with said front variable polarizer, polarizing light exiting said front variable polarizer at a second selected polarization level, in a second direction, wherein said first selected polarization level and said second selected polarization level are substantially zero, when no substantial electric power is applied respectively, to said front variable polarizer and said rear variable polarizer. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. Devise for transmitting light at variable intensity, the device comprising:
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a front variable polarizer, polarizing incoming light at a first selected polarization level, in a first direction;
a rear variable polarizer, optically coupled with said front variable polarizer; and
at least one controllable optical phase shifter, located between said front variable polarizer and said rear variable polarizer, said at least one controllable optical phase shifter shifting the relative phase between linearly polarized components of light which exits said front variable polarizer, by a selected phase shift, wherein said rear variable polarizer polarizes light received from said at least one controllable optical phase shifter, at a second selected polarization level, in a second direction. - View Dependent Claims (7, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. Method for transmitting light at variable intensity, the method comprising the procedures of:
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polarizing light, at a first selected polarization level, by a front variable polarizer;
polarizing said light, at a second selected polarization level, by a rear variable polarizer, wherein said first selected polarization level and said second polarization levels are substantially zero, when no substantial power is available. - View Dependent Claims (67, 68, 69, 70, 71)
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72. Method for transmitting light at variable intensity, the method comprising the procedures of:
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polarizing light, at a first selected polarization level, by a front variable polarizer;
shifting the relative phase between two linearly polarized components of said light, by a selected phase shift; and
polarizing said light, at a second selected polarization level, by a rear variable polarizer. - View Dependent Claims (73, 74, 75, 76, 77, 78, 79)
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80. Apparatus, for viewing an image at variable intensity, the apparatus comprising:
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an optical assembly; and
a variable transmitter, said variable transmitter including;
a front variable polarizer; and
a rear variable polarizer, optically coupled with said front variable polarizer, wherein said front variable polarizer applies substantially no polarization to an incoming light and transmits said incoming light as an outgoing light, when a first change in an electric field is applied to said front variable polarizer, wherein said front variable polarizer polarizes said incoming light in a first direction, thereby producing a polarized incoming light, when a second change in said electric field is applied to said front variable polarize, wherein said rear variable polarizer applies substantially no polarization to said outgoing light, when said first change is applied to said rear variable polarizer, and wherein said rear variable polarizer said polarized incoming light in a second direction, when said second change is applied to said rear variable polarizer. - View Dependent Claims (81)
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Specification