Method and device for carrying out optical pickup
Disclosed is an optical imaging method and device enabling display and 3D measurement of tridimensional objects ( 1 ), whereby at least two individual images are captured one after the other and the image conversion is controlled or regulated differently for these individual images. By employing adjustable optical means ( 10 - 14 ) for the illumination of the object or in the optical path for the imaging of the object on the image converter ( 15 ) it is possible to acquire a larger amount of visual information on the object observed than that which is available in an individual image due to the limitations imposed by the design of the converter used ( 15 ). The invention relates to processes and design forms of the device enabling recording units to be designed, using simply and generally commercial components, which are able to display and measure larger objects ( 1 ) despite a reduced field of vision imposed by the design. This is especially useful for diagnosis in invasive applications in the bodies of humans or animals.
1. A scanner for scanning an object and obtaining three-dimensional information about the surface of said object, comprising:
a) at least one two-dimensional electronic image converter;
b) at least one optical element imaging said object on said electronic image converter;
c) a first beam source for illuminating said object and a second beam source for illuminating said object,
d) wherein said first beam source illuminates said object and substantially simultaneously a first image of the object is obtained by said at least one electronic image converter, said first image obtained from incident radiation at a first level of received beam energy;
e) wherein said second beam source illuminates said object and substantially simultaneously a second image of said object is obtained by said at least one electronic image converter, said second image obtained from incident radiation at a second level of received beam energy different from said first level; and
f) wherein said illumination of said object and the generation of said first and second images are performed in succession such that said electronic image converter thereby obtains two consecutive images of the object at different levels of received beam energy.
2. The scanner of claim 1 , wherein said electronic image converter comprises a charge-coupled device array.
3. The scanner of claim 1 , wherein said scanner further comprises a carrier which is in the form of a prism adapted for directing radiation from said beam sources in the direction of said object, said prism sized and shaped so as to have a portion thereof fit into the oral cavity of a human and enable said portion to be moved relative to anatomical structures within said oral cavity.
4. The scanner of claim 1 , wherein said at least one of said beam sources comprises a flash lamp.
5. The scanner of claim 3 , wherein the scanner further comprises a frame housing said first and second beam sources and wherein said carrier is rigidly connected to said frame.
6. The scanner of claim 5 , wherein said optical element comprises at least one lens element fixed with respect to said frame.
7. The scanner of claim 5 , wherein said carrier further comprises at least one optically reflective surface reflecting radiation from said at least one beam source towards said object.
8. The scanner of claim 7 , wherein said reflective surface comprises a peripheral internal surface of said carrier.
9. The scanner of claim 7 , wherein said reflective surface comprises at least two internal surfaces of said carrier, and wherein radiation from said beam sources undergoes total internal reflection in a path between said beam sources and said object.
10. The scanner of claim 7 , wherein said reflective surface further comprises a mirror.
11. The scanner of claim 5 , wherein said carrier is releasable from said frame to thereby permit said carrier to be separately sterilized and/or disinfected from said frame.