Despeckling devices and methods
First Claim
Patent Images
1. A laser system comprising:
- a laser light source operable to output illuminating light;
a display device operable to receive the illuminating light;
an optical fiber operable directed the illuminating light from the laser light source to the display device;
a vibration device attached to the optical fiber, wherein the vibration device is operable to vibrate at a frequency greater than a threshold frequency so as to reduce speckle.
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Accused Products
Abstract
Illuminating coherent or partially coherent light may be directed over an optical fiber and may be despeckled by vibrating the optical fiber or by increasing the number of modes and modal dispersion. An exemplary embodiment is directed to an optical fiber attached to a vibrating device operable to vibrate the optical fiber above a threshold frequency. Another exemplary embodiment is directed to an optical fiber configured to have a refractive index profile operable to increase the number of modes and modal dispersion.
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Citations
20 Claims
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1. A laser system comprising:
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a laser light source operable to output illuminating light; a display device operable to receive the illuminating light; an optical fiber operable directed the illuminating light from the laser light source to the display device; a vibration device attached to the optical fiber, wherein the vibration device is operable to vibrate at a frequency greater than a threshold frequency so as to reduce speckle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of providing illumination, comprising:
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outputting illuminating light from a laser light source; directing the illuminating light through an optical fiber to a display device; and vibrating the optical fiber at a frequency greater than a threshold frequency so as to reduce speckle. - View Dependent Claims (9, 10, 11, 12)
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13. A laser system comprising:
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a laser light source operable to output illuminating light; a display device operable to receive the illuminating light; an optical fiber operable to direct the illuminating light from the laser light source to the display device; wherein the optical fiber has a core extending along a central longitudinal axis and a cladding layer covering the core, the core having a refractive index profile defined from the central longitudinal axis to a longitudinal edge, the refractive index profile comprising a first refractive index at the longitudinal edge that is greater than a second refractive index at the central longitudinal axis. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification