WO2006028527A3 - Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture - Google Patents

Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture Download PDF

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Publication number
WO2006028527A3
WO2006028527A3 PCT/US2005/016231 US2005016231W WO2006028527A3 WO 2006028527 A3 WO2006028527 A3 WO 2006028527A3 US 2005016231 W US2005016231 W US 2005016231W WO 2006028527 A3 WO2006028527 A3 WO 2006028527A3
Authority
WO
WIPO (PCT)
Prior art keywords
field
extended depth
spherical aberration
focal length
length lens
Prior art date
Application number
PCT/US2005/016231
Other languages
French (fr)
Other versions
WO2006028527A2 (en
Inventor
Nicholas George
Wanli Chi
Original Assignee
Automatic Recognition & Contro
Nicholas George
Wanli Chi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automatic Recognition & Contro, Nicholas George, Wanli Chi filed Critical Automatic Recognition & Contro
Priority to JP2007529820A priority Critical patent/JP2008511859A/en
Priority to EP05748290A priority patent/EP1789830A2/en
Priority to CN200580036684A priority patent/CN100594398C/en
Priority to CA002577735A priority patent/CA2577735A1/en
Priority to AU2005283143A priority patent/AU2005283143A1/en
Publication of WO2006028527A2 publication Critical patent/WO2006028527A2/en
Publication of WO2006028527A3 publication Critical patent/WO2006028527A3/en
Priority to IL181671A priority patent/IL181671A/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0075—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. increasing, the depth of field or depth of focus
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/50—Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof

Abstract

An extended depth of field is achieved by a computational imaging system that combines a multifocal imaging subsystem for producing a purposefully blurred intermediate image with a digital processing subsystem for producing a recovered image having an extended depth of field. The multifocal imaging system preferably exhibits spherical aberration as the dominant feature of the purposeful blur. A central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image contains a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.
PCT/US2005/016231 2004-09-03 2005-05-11 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture WO2006028527A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2007529820A JP2008511859A (en) 2004-09-03 2005-05-11 Extended depth of focus using a multifocal length lens with a controlled spherical aberration range and a concealed central aperture
EP05748290A EP1789830A2 (en) 2004-09-03 2005-05-11 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture
CN200580036684A CN100594398C (en) 2004-09-03 2005-05-11 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture
CA002577735A CA2577735A1 (en) 2004-09-03 2005-05-11 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture
AU2005283143A AU2005283143A1 (en) 2004-09-03 2005-05-11 Multifocal lens with extended depth of field
IL181671A IL181671A (en) 2004-09-03 2007-03-01 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US60707604P 2004-09-03 2004-09-03
US60/607,076 2004-09-03
US52299004P 2004-11-30 2004-11-30
US60/522,990 2004-11-30
US10/908,287 US7336430B2 (en) 2004-09-03 2005-05-05 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and a centrally obscured aperture
US10/908,287 2005-05-05

Publications (2)

Publication Number Publication Date
WO2006028527A2 WO2006028527A2 (en) 2006-03-16
WO2006028527A3 true WO2006028527A3 (en) 2007-01-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/016231 WO2006028527A2 (en) 2004-09-03 2005-05-11 Extended depth of field using a multi-focal length lens with a controlled range of spherical aberration and centrally obscured aperture

Country Status (10)

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US (4) US7336430B2 (en)
EP (1) EP1789830A2 (en)
JP (1) JP2008511859A (en)
KR (1) KR20070057231A (en)
CN (1) CN100594398C (en)
AU (1) AU2005283143A1 (en)
CA (1) CA2577735A1 (en)
IL (1) IL181671A (en)
SG (1) SG142313A1 (en)
WO (1) WO2006028527A2 (en)

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