Imaging system with large depth of field

Details Imaging system with large depth of field Imaging system with large depth of field

2006-09-12

2006-09-12

Chang, Audrey (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C348S070000, C348S269000, C348S345000, C396S333000, C356S328000

Reexamination Certificate

active

07106511

ABSTRACT:
An optical imaging system and method for achieving a large depth of field without decreasing the relative aperture of an imaging lens. The imaging system has a light source for sequentially illuminating an object to be imaged with light of different ones of a plurality of wavelengths, and an imaging lens that has a focal length that varies with the wavelength of the light that illuminates the object. For each wavelength of light by which the object is illuminated, the imaging lens will image a different object plane onto an image receiving unit, and the image receiving unit will capture one well-focused, high resolution image of the object.

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patent: 5867264 (1999-02-01), Hinnrichs
patent: 6693672 (2004-02-01), Oliver
patent: 20207170 (2002-08-01), None

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