Image capturing apparatus and distance measuring method
First Claim
Patent Images
1. An image capturing apparatus for obtaining information regarding a depth of a subject, comprising:
- an illumination unit operable to cast a first illumination light beam mainly having a first wavelength and a second illumination light beam mainly having a second wavelength and a third wavelength from optically different emission positions onto said subject, said second and third wavelengths being different from said first wavelength; and
a depth calculator operable to calculate a depth-direction distance to said subject based on outgoing light beams from said subject.
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Abstract
An image capturing apparatus for obtaining information regarding a depth of a subject includes: an illumination unit operable to cast a first illumination light beam mainly having a first wavelength and a second illumination light beam mainly having a second wavelength and a third wavelength from optically different emission positions onto the subject, the second and third wavelengths being different from the first wavelength; and a depth calculator operable to calculate a depth-direction distance to the subject based on outgoing light beams from the subject.
68 Citations
45 Claims
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1. An image capturing apparatus for obtaining information regarding a depth of a subject, comprising:
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an illumination unit operable to cast a first illumination light beam mainly having a first wavelength and a second illumination light beam mainly having a second wavelength and a third wavelength from optically different emission positions onto said subject, said second and third wavelengths being different from said first wavelength; and
a depth calculator operable to calculate a depth-direction distance to said subject based on outgoing light beams from said subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A distance measuring method for obtaining information regarding a depth of a subject, comprising:
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an illumination step of casting a first illumination light beam mainly having a first wavelength and a second illumination light beam mainly having second and third wavelengths from optically different emission positions onto said subject simultaneously, said second and third wavelengths being different from said first wavelength;
a separation step of separating outgoing light beams obtained from said subject that is illuminated with said first and second illumination light beams into a first outgoing light beam having said first wavelength, a second outgoing light beam having said second wavelength and a third outgoing light beam having said third wavelength;
a capturing step of capturing said first, second and third outgoing light beam that are separated;
a light intensity detection step of detecting intensities of said first, second and third outgoing light beams that are captured; and
a depth calculation step of calculating a depth-direction distance to said subject by using the intensities of said first, second and third outgoing light beams. - View Dependent Claims (35, 36, 37)
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38. A distance measuring method for obtaining information regarding a depth of a subject, comprising:
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an illumination step of casting a first illumination light beam mainly having a first wavelength and a second illumination light beam mainly having a second wavelength and a third wavelength from optically different emission positions onto said subject, said second wavelength being shorter than said first wavelength, said third wavelength being longer than said first wavelength;
a separation step of optically separating outgoing light beams from said subject onto which said first and second illumination light beams are cast into a first outgoing light beam having said first wavelength and a second outgoing light beam having said second and third wavelengths;
a capturing step of capturing said first and second outgoing light beams separated from each other;
a light intensity detection step of detecting intensities of said first and second outgoing light beams;
a depth calculation step of calculating a depth-direction distance to said subject by using the intensities of said first and second outgoing light beams. - View Dependent Claims (39)
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40. An information obtaining method for obtaining distance information indicative of a distance to an object, comprising:
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an illumination step of casting light beams onto said object from optically different two illumination positions;
a capturing step of capturing said light beams reflected from said object;
an angle calculation step of calculating one of angles at which said light beams are cast onto said object from said optically different two illumination positions; and
a calculation step of calculating distance information indicative of a distance to a measured portion of said object based on reflected light beams from said measured portion of and reflected light beams from a region in the vicinity of said measured portion of said object both of which are captured in said capturing step. - View Dependent Claims (41, 42)
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43. An information obtaining method for obtaining distance information indicative of a distance to an object, comprising:
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an illumination step of casting light beams onto said object from optically different three or more illumination positions;
a capturing step of capturing said light beams reflected from said object; and
a calculation step of calculating said distance information based on said reflected light beams captured in said capturing step. - View Dependent Claims (44, 45)
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Specification