Planar laser illumination and imaging (PLIIM) based engine
First Claim
1. A planar laser illumination and imaging (PLIIM) based engine comprising:
- an engine housing having light transmission aperture;
an image formation and detection module, disposed in said engine housing, and having an image detection array and image formation optics with a field of view (FOV) extending from said image detection array, through said light transmission aperture and onto an object moving relative to said engine housing during object illumination and imaging operations;
a planar laser illumination beam (PLIB) producing device, disposed in said engine housing, and having at least one visible laser illumination source arranged in relation to said image formation and detection module, for producing a planar light illumination beam (PLIB), and projecting said PLIB beam through said light transmission aperture and oriented such that the plane of said PLIB is coplanar with the field of view of said image formation and detection module so that the object can be simultaneously illuminated by said PLIB and imaged within said FOV and onto said image detection array for detection as a digital linear image of the object;
a laser despeckling mechanism, disposed in said engine housing, for reducing the coherence of said PLIB during object illumination and imaging operations so that the power of speckle-pattern noise is substantially reduced in digital linear images detected on said image detection array;
an image grabber, disposed in said engine housing, for grabbing digital linear images formed and detected by said image formation and detection module; and
an image data buffer, disposed in said engine housing, for buffering said digital linear images grabbed by said image grabber.
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Abstract
A planar laser illumination and imaging (PLIIM) based engine including; an engine housing having light transmission aperture; an image formation and detection module and having an image detection array and image formation optics with a field of view (FOV) extending from the image detection array, through the light transmission aperture and onto an object moving relative to the engine housing during object illumination and imaging operations; a planar laser illumination beam (PLIB) producing device, and having at least one visible laser illumination source arranged in relation to the image formation and detection module, for producing a planar light illumination beam (PLIB), and projecting the planar light illumination beam through light transmission aperture and oriented such that the plane of the PLIB is coplanar with the field of view of the image formation and detection module so that the object can be simultaneously illuminated by the planar light illumination beam and imaged within the field of view and onto the image detection array for detection as a digital linear image of the object; a laser despeckling mechanism for reducing the coherence of the PLIB during object illumination and imaging operation so that the power of speckle-pattern noise is substantially reduced in digital linear images detected on said image detection array.
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Citations
14 Claims
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1. A planar laser illumination and imaging (PLIIM) based engine comprising:
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an engine housing having light transmission aperture; an image formation and detection module, disposed in said engine housing, and having an image detection array and image formation optics with a field of view (FOV) extending from said image detection array, through said light transmission aperture and onto an object moving relative to said engine housing during object illumination and imaging operations; a planar laser illumination beam (PLIB) producing device, disposed in said engine housing, and having at least one visible laser illumination source arranged in relation to said image formation and detection module, for producing a planar light illumination beam (PLIB), and projecting said PLIB beam through said light transmission aperture and oriented such that the plane of said PLIB is coplanar with the field of view of said image formation and detection module so that the object can be simultaneously illuminated by said PLIB and imaged within said FOV and onto said image detection array for detection as a digital linear image of the object; a laser despeckling mechanism, disposed in said engine housing, for reducing the coherence of said PLIB during object illumination and imaging operations so that the power of speckle-pattern noise is substantially reduced in digital linear images detected on said image detection array; an image grabber, disposed in said engine housing, for grabbing digital linear images formed and detected by said image formation and detection module; and an image data buffer, disposed in said engine housing, for buffering said digital linear images grabbed by said image grabber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification