Image measuring apparatus

Details Image measuring apparatus Image measuring apparatus

1996-05-10

1998-10-06

Font, Frank G.

Optics: measuring and testing

By particle light scattering

With photocell detection

356345, G01B 902

Patent

active

058185879

ABSTRACT:
An image measuring apparatus for measuring an image of a tooth or gum applies the radiation of a laser beam to permit extremely quick, reliable, safe detection of dental caries and other dental pathological conditions. The low incident power of the laser radiation would not cause damage or pain to the tissue, such as the tooth or gum. The image measuring apparatus is equipped with a light source which emits light having at least a wavelength in a range of 500 nm or more to less than 600 nm; it uses the light emitted from the light source to obtain 2-dimensional images or computed tomographic images of a tooth or gum from the light, which has been transmitted through the tooth or gum, by using an optical heterodyne detection method.

REFERENCES:
patent: 4468197 (1984-08-01), Provost
patent: 4836206 (1989-06-01), Maxwell et al.
patent: 5570182 (1996-10-01), Nathel et al.

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