AUTOMATIC LENS MAPPING SYSTEM

摘要

A system for holding and aligning spectacles such that mapping measurements of the optical properties of a lens can be performed with the lens held such that its optical axis is parallel to the incident measurement beam. This may be implemented using three points which define a plane with which a surface of the lens can be aligned. The frame gripper is constructed such that the lens to be measured is free to rotate in space around any axis until clamped by the three alignment pin support arrangement, with the exception of rotation around the optical axis of the lens. This freedom of rotation allows the lens to be positioned on the alignment pin support automatically without the need for operator intervention. The spectacle frame is clamped using a spring loaded caliper device, configured to sequentially align the mechanical center of each lens with the measuring beam.

主权项

1. A system for measurement of the optical properties of spectacle lenses, comprising:
a source of light for transmitting a light beam through a lens to be measured; an optical analyzing unit for analyzing the light beam after transmission through said lens; a lens aligner disposed in the path of said light beam before said optical analyzing unit, said lens aligner defining a plane perpendicular to the path of said light beam; a mechanism for pressing said lens into position on said lens aligner; a frame gripper for gripping the lenses of said spectacles; and a mechanical structure adapted to enable said frame gripper, before clamping of said lens on said lens aligner, to rotate said spectacles freely about both axes orthogonal to that parallel to the path of said light beam.