Digital imaging assembly and methods thereof

Details Digital imaging assembly and methods thereof Digital imaging assembly and methods thereof

2007-10-16

2007-10-16

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

C250S208100, C250S341100, C250S370080, C356S483000, C356S497000, C359S385000

Reexamination Certificate

active

10983053

ABSTRACT:
A coherent radiation imaging system that produces digital images with a reduced amount of speckle. Radiation from a long coherence length source is used to form an image of a sample. The output coherent wave is temporally divided into a plurality of wavelets. The spatial phase of each wavelet is then modulated a known and different amount. Each phase modulated wavelet illuminates the sample and is perturbed by its interaction with the sample. A spatial phase map of each perturbed wavelet is then created and converted to a sample image with an image reconstruction program. The plurality of sample images thus formed is statistically averaged to form a final averaged image. The high frequency speckle that is not optically resolvable tends to average to zero with continual statistical averaging, leaving only the optically resolvable lower frequency phase information.

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