Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1998-12-07
2000-07-25
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
C01N 1124
Patent
active
060942703
ABSTRACT:
A real-time range finder comprising light sources 12 and 13 for composing a plurality of light beams having different wavelength characteristics and sweeping the traveling direction of the composite light and either the wavelength or intensity of the light; a plurality of optical filters 15 and 16 for introducing light beams corresponding to wavelength characteristics of the plural light beams to charge-coupled devices; the charge coupled devices 20 and 21 arranged in accordance with the plural optical filters, respectively; a distance calculation unit 26 for calculating, from pixel values of image data obtained from the charge-coupled devices and from the sweep start time of the light sources, a time at which light is incident on the pixels, and calculating a distance to the subject. With such this finder, it is possible to measure a distance at real-time with a simple structure while using normal photo sensors which are not provided with time measurement functions.
REFERENCES:
patent: 4349277 (1982-09-01), Mundy et al.
patent: 4611917 (1986-09-01), Robieux et al.
patent: 5880846 (1999-03-01), Hasman et al.
patent: 6028672 (2000-02-01), Geng
K. Sato, "Recent Trends on 3D Range Imaging", Graduate School of Information Science, Nara InstituteOf Science and Technology, Feb. 12, 1994, pp. 209-215 (with partial English translation).
J. Tajima et al., "Range Image Acquisition by Rainbow Range Finder", Rainbow Range Finder, vol. J73-D-II, No. 3, pp. 374-382, 1990 (with partial English translation).
Morimura Atsushi
Uomori Kenya
Matsushita Electric - Industrial Co., Ltd.
Rosenberger Richard A.
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