Patent ID: 6771422
Filing Date: 2004-08-03
Classification: G02B

Abstract:
An optical imaging system that produces images with a large depth of field independent of f number, comprising:a plurality of photo-detector elements; computer means for computing the amount of defocus aberration for each photo detector element, wherein said computer means is responsive to electronic signals for computing said amount of defocus aberration by solving the following transport equation for each of said photo detector elements: &Del;&UpTee;&it;I&CenterDot;&Del;&UpTee;&it;W+I&it;&Del;&UpTee;2&it;W+&PartialD;I&PartialD;z=0where I is the irradiance of light incident upon the photo-detector elements, W is a phase term in terms of wavelength &lgr;, and Z is the direction of beam propagation; and means for compensating for said aberration.