Method and system for object reconstruction
First Claim
1. A system for use in the object reconstruction, the system comprising:
- (a) an illuminating unit, comprising a coherent light source and a generator of a random speckle pattern accommodated in the optical path of illuminating light propagating from the light source towards an object, thereby projecting onto the object a coherent random speckle pattern; and
(b) an imaging unit for detecting a light response of an illuminated region and generating image data,the image data being indicative of the object with the projected speckles pattern and thus indicative of a shift of the pattern in the image of the object relative to a reference image of said pattern, the system thereby enabling real-time reconstruction of a three-dimensional map of the object.
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Accused Products
Abstract
A system and method are presented for use in the object reconstruction. The system comprises an illuminating unit, and an imaging unit (see FIG. 1). The illuminating unit comprises a coherent light source and a generator of a random speckle pattern accommodated in the optical path of illuminating light propagating from the light source towards an object, thereby projecting onto the object a coherent random speckle pattern. The imaging unit is configured for detecting a light response of an illuminated region and generating image data. The image data is indicative of the object with the projected speckles pattern and thus indicative of a shift of the pattern in the image of the object relative to a reference image of said pattern. This enables real-time reconstruction of a three-dimensional map of the object.
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Citations
45 Claims
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1. A system for use in the object reconstruction, the system comprising:
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(a) an illuminating unit, comprising a coherent light source and a generator of a random speckle pattern accommodated in the optical path of illuminating light propagating from the light source towards an object, thereby projecting onto the object a coherent random speckle pattern; and (b) an imaging unit for detecting a light response of an illuminated region and generating image data, the image data being indicative of the object with the projected speckles pattern and thus indicative of a shift of the pattern in the image of the object relative to a reference image of said pattern, the system thereby enabling real-time reconstruction of a three-dimensional map of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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15. The system of claim 1, comprising an adjustor configured for reducing the illumination brightness variation between different regions of the field of view of the imaging unit.
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16. The system of claim 15, wherein said adjustor comprises a diffractive optical element.
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17. The system of claim 16, wherein said diffractive optical element is configured so as to operate together with the pattern generator to adjust the brightness within a plane transversal to the optical path of illuminating light propagation.
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18. The system of claim 16, wherein said diffractive optical element is configured to enable reduction of the brightness variability along an axis substantially parallel to the illuminating light propagation.
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19. The system of claim 16, wherein said diffractive optical element is a phase only element accommodated downstream of the pattern generator with respect to the illuminating light propagation, and is configured to adjust the brightness within a plane transversal to the optical path of illuminating light propagation.
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20. The system of claim 19, wherein the illuminating unit is configured as a 4-F Fourier Transformer.
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21. The system of claim 1, wherein the illuminating unit is configured as a 4-F Fourier Transformer, comprising a diffractive optical element which is configured as a phase only element, a Fourier transform of which produces an elliptic cross section of intensity, and is accommodated between two converging lenses.
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22. The system of claim 1, wherein the imaging unit comprises a single light detector defining a stationary field of view.
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23. A system for use in the object reconstruction, the system comprising:
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(a) an illuminating unit comprising a coherent light source and a light diffuser unit accommodated in the optical path of illuminating light propagating from the light source towards an object thus projecting onto the object a coherent random speckle pattern; and (b) an imaging unit comprising a single light detector defining a stationary field of view, for detecting a light response of an illuminated region and generating image data, the image data being indicative of the object with the projected speckles pattern and thus indicative of a shift of the pattern in the image of the object relative to a to reference image of said pattern, the system thereby enabling real-time reconstruction of a three-dimensional map of the object.
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24. A system for use in the object reconstruction, the system comprising:
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(a) an illuminating unit comprising a coherent light source and a light diffuser is unit accommodated in the optical path of illuminating light propagating from the light source towards an object thus projecting onto the object a coherent random speckle pattern; and
an imaging unit for detecting a light response of an illuminated region and generating image data, the imaging unit and the diffuser being oriented so as to provide substantially equal distances from the diffuser and the imaging unit to the object,the image data being indicative of the object with the projected species pattern and thus indicative of a shift of the pattern in the image of the object relative to a reference image of said pattern, the system thereby enabling real-time reconstruction of a three-dimensional map of the object.
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25. A system for use in the object reconstruction, the system comprising:
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(a) an illuminating unit comprising a coherent light source and a light diffuser unit accommodated in the optical path of illuminating light propagating from the light source towards an object thus projecting onto the object a coherent random speckle pattern; and (b) an imaging unit for detecting a light response of an illuminated region and generating image data, the image data being indicative of the object with the projected speckles pattern and thus indicative of a shift of the pattern in the image of the object relative to a reference image of said pattern, (c) a control unit configured for storing reference data indicative of a reference image of said coherent random speckle pattern.
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26. A projection module for use in a system for object reconstruction, the projection module comprising a coherent light source and a light diffuser configured for that diffusing light impinging thereon by addition of random phase, thereby producing a random speckle pattern for projecting it onto an object thereby enabling imaging of the object with the projected pattern and real time processing image data for reconstructing a three-dimensional map of the object.
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27. A method for use in real-time reconstruction of an object, the method comprising:
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(i) projecting onto the object a random speckle pattern formed by illuminating coherent light; (ii) detecting a light response from the object and generating image data of the object with the projected speckles pattern; (iii) processing the image data to determine a shift of the pattern in the image of the object relative to a reference image of said pattern, thereby determining a three-dimensional map of the object. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification