Optical mask for all-optical extended depth-of-field for imaging systems under incoherent illumination
First Claim
1. A method of making a mask for an optical imaging system, comprising the steps of:
- (a) optimizing an optical property of the mask relative to an intensity distribution incident on an image plane of the optical imaging system; and
(b) fabricating the mask in accordance with said optical property.
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Accused Products
Abstract
A mask for enhancing the depth of focus of an optical imaging system is designed by optimizing an optical property (transmittance or reflectance) of the mask relative to the intensity distribution in the system'"'"'s image plane. Preferably, a desired PSF intensity is selected, a desired misfocus parameter range is selected, and the optical property is adjusted to minimize a measure of the departure of the system'"'"'s PSF intensity, as computed from the mask'"'"'s optical property, from the desired PSF intensity, over the entire misfocus parameter range. Most preferably, the desired PSF intensity is selected as the inverse Fourier transform of a desired OTF. Preferably, the mask is fabricated as a DOE.
55 Citations
24 Claims
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1. A method of making a mask for an optical imaging system, comprising the steps of:
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(a) optimizing an optical property of the mask relative to an intensity distribution incident on an image plane of the optical imaging system; and
(b) fabricating the mask in accordance with said optical property. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification