Method of testing the uniformity of an image sensor

Details Method of testing the uniformity of an image sensor Method of testing the uniformity of an image sensor

2008-01-01

2008-01-01

Lee, M. (Department: 2622)

Television

Monitoring, testing, or measuring

Testing of camera

C205S208000

Reexamination Certificate

active

07315322

ABSTRACT:
A method for testing an image sensor for photoresponse uniformity, the method includes the steps of providing a light source having inherent non-uniform light intensity characteristics; providing a light sensing device for measuring an intensity response of the light source on a predetermined image plane; determining an area on the image plane corresponding to an area for the image sensor; measuring pre-selected points of the determined area by the light sensing device for measuring incident light intensity from the light source on the image plane; interpolating non-measured points on the image plane representing an estimate of the non-uniformity of the light source at the non-measured points; inverting the interpolated image to represent the inverse of the light source non-uniformity; and applying the inverted image to the response of the image sensor which compensates for light source non-uniformity and enables the ability to quantify accurately the non-uniformity of the image sensor.

REFERENCES:
patent: 4523231 (1985-06-01), Therrien
patent: 5467128 (1995-11-01), Yates et al.
patent: 5694227 (1997-12-01), Starkweather
patent: 6392216 (2002-05-01), Peng-Tan
patent: 7012634 (2006-03-01), Vogel et al.

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