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US 7,120,309 B2Granted
Ghost image correction system and method
AssigneeLightSharp LLC
InventorKevin J. Garcia
Life of this patent
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AssigneeLightSharp LLC
InventorKevin J. Garcia
Estimating the term…
A new and useful method and system for correcting for ghost images in a telecentric optical system is provided. Ghost images generated from planar optical surfaces in the image space after the major elements of a telecentric optical system are shift invariant. In other words the ghost images produced by these optical elements do not change their shape with different field angles or points. The ghost image's invariance with field position will allow the ghost image to be subtracted or removed from the image of an object recorded on a digital detector such as CCD or CMOS detector when its optical system is telecentric in image space. This subtraction may be accomplished, for example, with a removal technique using a measured ghost function germane and invariant to that particular optical system. The combination of the ghost image and scatter functions is linearly shift invariant and therefore, both noise contributions could be removed from the resulting digital image using similar removal techniques.
Apparatus comprising a telecentric optical system for transmitting an image to a digital image plane, said telecentric optical system comprising
Apparatus comprising a telecentric optical system for transmitting an image to a digital image plane, said telecentric optical system comprising
Apparatus comprising a telecentric optical system for transmitting an image to a digital image plane, said telecentric optical system comprising
A method for providing ghost image correction in a telecentric optical system for transmitting an image to a digital image plane, where the telecentric optical system comprises telecentric optics which are telecentric in image space, and at least one planar surface produces ghost images is located in image space after the telecentric optics, the method comprising the steps of
A method for providing ghost image correction in a telecentric optical system for transmitting an image to a digital image plane, where the telecentric optical system comprises telecentric optics which are telecentric in object space, and at least one planar surface produces ghost images is located in object space before the telecentric optics, the method comprising the steps of
A method for providing ghost image correction in a telecentric optical system for transmitting an image to a digital image plane, where the telecentric optical system comprises telecentric optics which have dual telecentricity, and wherein at least one planar surface that produces ghost images is located in image space after the telecentric optics and or another planar surface that produces ghost images is located in object space before the telecentric optics, the method comprising the steps of
Apparatus comprising a telecentric optical system for transmitting an image to a digital image plane, said telecentric optical system comprising
Dependencies are inferred from the claim text.