METHOD AND DEVICE FOR DETERMINING OPTICAL CHARACTERISTICS OF MULTILAYER OBJECTS Russian patent published in 2005 - IPC

FIELD: method and device can be used for determining optical characteristics of multilayer objects (layers of enamel and dentine) containing internal matter which is partially transparent and dissipates light diffusely.

SUBSTANCE: radiation is applied to surface of tested object and subsequently registered at output of receiving light guide. Area of partial darkening is formed onto surface of object at the receiving light guide's exit window. Area of darkening provides distribution of dissipated radiation power density, which changes within space. Dissipated radiation enters input window of light guide and is registered. Optical characteristics of multilayer object are judged from the dissipated radiation. Device for realization of the method has illuminating unit provided with exit window, radiation registration unit, at least two photosensitive elements, signal control and processing unit, and receiving light guide. Illuminating unit's exit window and receiving light guide are mounted coaxial to each other. Photosensitive elements of radiation registration unit are optically matched with exit window of receiving light guide and are disposed coaxial to each other for registration of volumetric distribution of radiation power dissipated by tested object.

EFFECT: improved precision.

7 cl, 5 dwg