Patent ID: 7862174
Filing Date: 2011-01-04
Classification: A61B

Abstract:
1. A method for measuring, in a predetermined measurement plane, the local scattering of an optical system, comprising: the illumination of the optical system by means of a point or quasi-point source emitting a light flux intended to be transmitted by the optical system, such that said transmitted flux comprises a component of direct flux and a component of flux scattered by said optical system; the interception of a central part of the transmitted flux by means for sampling the flux, of predetermined dimensions, positioned in a plane conjugated with the plane of said source, the intercepted flux comprising the direct flux component and a part called narrow angle of the scattered flux component; the measurement of the intercepted flux by means of an analyser comprising an array of microlenses positioned in an image plane of the measurement plane and first detection means, each microlens forming an image of said sampling means on the first detection means, the dimensions of the sampling means being defined such that the images of the sampling means formed by adjacent microlenses on the first detection means present an overlap zone smaller than the projection zone of a microlens on the first detection means; and the determination of the narrow angle part of the scattered flux component by the measurement of the flux in each overlap zone.