Systems and methods for speckle reduction through bandwidth enhancement
US6975294B2 · kind B2 · utility
51Cited by
10References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 10, 2001 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jan 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser imaging system with reduced speckle is disclosed. The laser imaging system includes spatially superpositioned 1-D arrays or alternatively 2-D arrays of independent emitters of laser radiation, with each emitter having a spectral bandwidth Δλi centered at some arbitrary wavelength λ0i. The elements of the array are allowed, by design, to have a slightly different central wavelength, thereby creating an ensemble bandwidth ΔΛ which is much greater than the bandwidth Δλi of any individual emitter in the array. The resulting increased bandwidth reduces speckle in a displayed image.
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