Determining Stray-Light Point-Spread Function

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When an optical system acquires an image, some portion of the light (stray light) entering the system is misdirected to undesirable locations resulting in degradation of the image. The stray light point-spread function (PSF) of an optical system is used to eliminate stray light, which results in improved contrast, sharpened details, and more vivid color. Currently, the PSF is manually determined by characterizing the optical lens system in a laboratory setting.

Purdue University researchers have developed a new method employing a class of analytical models, a computer apparatus, a computer program, and an optical apparatus to be employed together to determine the PSF. This new method is much simpler compared to current methods used because it does not require extensive tests in a lab setting, while still accounting for relevant physical effects of the device.

Advantages:
-Does not require the design information of the lens system
-Does not assume shift variance of the PSF

-Computer Technology
-Optics
Jan 18, 2008
NATL-Patent
United States
8,396,320
Mar 12, 2013

Jan 18, 2008
PCT-Patent
WO
(None)
(None)

Jan 19, 2007
Provisional-Patent
United States
(None)
(None)
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