Ultrafast optical imaging of objects in or behind scattering med

Details Ultrafast optical imaging of objects in or behind scattering med Ultrafast optical imaging of objects in or behind scattering med

1995-04-06

1998-01-20

Glick, Edward J.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250330, 2503411, G01N 2149, G01N 2159

Patent

active

057104298

ABSTRACT:
A system for imaging an object in or behind a highly scattering medium includes a light source for illuminating the highly scattering medium with a beam of light. The light emerging form the highly scattering medium consists of a ballistic component, snake-like component and a diffuse component. A 4F Fourier imaging system including a Fourier spatial filter located at 2F is used to form a time gated image of the emerging light, the time gated image consisting primarily of the ballistic component and the snake-like component.

REFERENCES:
patent: 4945239 (1990-07-01), Wist et al.
patent: 5140463 (1992-08-01), Yoo et al.
patent: 5371368 (1994-12-01), Alfano et al.
Anderson et al., "Microscope Imaging Through Highly Scattering Media", Optics Letters, vol. 19, No. 13, Jul. 1, 1994, pp. 981-983.
Saleh et al., Fundamentals of Photonics, pp. 136-139, published by John Wiley & Sons, Inc., New York (1991).

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