METHOD AND APPARATUS FOR FABRICATING OPTICAL SUBSTRATES
First Claim
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1. An optical substrate comprising a prism structure that was modulated along a path in a lateral direction, wherein the path is in the nature of a mathematical function defined over a segment, C, of a coordinate system and characterized by a set of nonrandom, random, or pseudorandom parameters selected from the group consisting of amplitude, phase, and frequency.
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Abstract
In one embodiment, an optical substrate that includes a prism structure modulated along a path in a lateral direction. The path is in the nature of a mathematical function defined over a segment, C, of a coordinate system and characterized by a set of nonrandom, random or pseudorandom parameters selected from the group consisting of amplitude, phase and frequency.
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Citations
19 Claims
- 1. An optical substrate comprising a prism structure that was modulated along a path in a lateral direction, wherein the path is in the nature of a mathematical function defined over a segment, C, of a coordinate system and characterized by a set of nonrandom, random, or pseudorandom parameters selected from the group consisting of amplitude, phase, and frequency.
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13. A backlight display device comprising:
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an optical source capable of generating light; a light guide capable of guiding the light therealong; a reflective device positioned along the light guide capable of reflecting the light out of the light guide; an optical substrate capable of receiving the light from the light guide, the optical substrate comprising a prism structure that was modulated along an ith path in a lateral direction, wherein the path is in the nature of a mathematical function defined over a segment, C, of a coordinate system and characterized by a set of nonrandom, random or pseudorandom parameters selected from the group consisting of amplitude, phase, and frequency.
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14. A backlight display device comprising:
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an optical source capable of generating light; a light guide capable of guiding the light therealong; and a reflective device positioned along the light guide and capable of reflecting the light out of the light guide; wherein the light guide includes a surface that includes a prism structure that was modulated along an ith path in a lateral direction; wherein the path is in the nature of a mathematical function defined over a segment, C, of a coordinate system and characterized by a set of nonrandom, random, or pseudo random parameters selected from the group consisting of amplitude, phase, and frequency. - View Dependent Claims (15, 16, 17)
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18. A method of machining a surface of a workpiece, wherein the workpiece comprises a rotating drum, the method comprising:
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bringing a cutting tool into contact with the surface of the workpiece; and for at least one cutting pass, i, causing relative movement between the cutting tool and the surface of the workpiece in a direction parallel to an axis of the drum; wherein causing relative movement between the cutting tool and the surface of the workpiece comprises bandpass filtering a noise signal; providing the bandpass filtered noise signal to a function generator; generating a randomly or pseudorandomly modulated mathematical function from the function generator; and directing the relative movement between the cutting tool and the surface of the workpiece in response to the randomly or pseudorandomly modulated function.
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19. A method of machining a surface of a workpiece, wherein the workpiece comprises a flat plate moving at a velocity v, the method comprising:
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bringing a cutting tool into contact with the surface of the workpiece; and for at least one cutting pass, i, causing relative movement between the cutting tool and the surface of the workpiece in a direction across the plate; wherein causing relative movement between the cutting tool and the surface of the workpiece comprises bandpass filtering a noise signal; providing the bandpass filtered noise signal to a function generator; generating a randomly or pseudorandomly modulated mathematical function from the function generator; and directing the relative movement between the cutting tool and the surface of the workpiece in response to the randomly or pseudorandomly modulated function.
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Specification