Optical apparatus
First Claim
1. An optical apparatus comprising:
- a first deflection member formed of a nonlinear optical material having a refractive index which changes based on an intensity of a first control light beam incident thereon, the first deflection member having at least first, second and third sides, and the first side being adapted to receive an input light signal;
a second deflection member formed of a nonlinear optical material having a refractive index which changes based on an intensity of a second control light beam incident thereon, the second deflection member having at least first, second and third sides;
mask means, disposed in an information optical path from the third side of the first deflection member to the first side of second deflection member, for transmitting a predetermined pattern of light emitted from the third side of the first deflection member to the first side of the second deflection member;
first means for emitting the first control light beam on a first region of the first deflection member, the first control light beam being incident on the second side of the first deflection member;
second means for emitting the second control light beam on a second region of the second deflection member, the second control light beam being incident on the second side of the second deflection member, and said second region being defined by 180 degrees rotation of said first region around a predetermined axis, said predetermined axis being on a plane defined by a vector for a path of the input light signal and a vector for a direction of the first control light beam and going through a predetermined point between said first deflection member and said second deflection member; and
control means for controlling intensities of the first and second control light beams.
1 Assignment
0 Petitions
Accused Products
Abstract
The optical apparatus includes first and second deflection members, a mask, a pumping light source, and a controller. The first and second deflection members are formed of nonlinear optical material whose refractive index is changed upon light radiation. The mask is arranged on an optical path extending from a front side of the first deflection member to a rear side of a second deflection member. The mask has a predetermined transmission pattern. The pumping light source radiates first and second beams on predetermined regions of the first and second deflection members. This changes the refractive indices of the predetermined regions to bend the optical path. The controller variably controls the intensity of the first and second beams.
12 Citations
31 Claims
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1. An optical apparatus comprising:
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a first deflection member formed of a nonlinear optical material having a refractive index which changes based on an intensity of a first control light beam incident thereon, the first deflection member having at least first, second and third sides, and the first side being adapted to receive an input light signal; a second deflection member formed of a nonlinear optical material having a refractive index which changes based on an intensity of a second control light beam incident thereon, the second deflection member having at least first, second and third sides; mask means, disposed in an information optical path from the third side of the first deflection member to the first side of second deflection member, for transmitting a predetermined pattern of light emitted from the third side of the first deflection member to the first side of the second deflection member; first means for emitting the first control light beam on a first region of the first deflection member, the first control light beam being incident on the second side of the first deflection member; second means for emitting the second control light beam on a second region of the second deflection member, the second control light beam being incident on the second side of the second deflection member, and said second region being defined by 180 degrees rotation of said first region around a predetermined axis, said predetermined axis being on a plane defined by a vector for a path of the input light signal and a vector for a direction of the first control light beam and going through a predetermined point between said first deflection member and said second deflection member; and control means for controlling intensities of the first and second control light beams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification