The invention relates to a vehicle rearview mirror, in particular to L sight lens (an L lens for short) for increasing the view of a vehicle. According to the technical scheme, a longitudinal curvature radius and a standard curvature radius of a wide-angle lens surface arranged according to an L shape in the longitudinal direction are the same, and a constant value view-increased curvature radius is adopted as the transverse curvature radius; and the transverse curvature radius and the standard curvature radius of a wide-angle lens surface arranged according to an L shape in the transverse direction are the same, and a constant value view-increased curvature radius is adopted as the longitudinal curvature radius. A longitudinal view-increased curvature radius transversely arranged at the time and a transverse view-increased curvature radius longitudinally arranged at the time are adopted as the longitudinal curvature radius and the transverse curvature radius at the corner of the wide-angle lens surface arranged according to an L shape, and multi-order smooth treatment is carried out on generated curve surface connection positions. By means of the scheme, the designed L lens enables the view to be wider, and influences on senses of a driver are avoided.
L lens curvature radius scheme
2015-11-25
Patent
Electronic Resource
English
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
MEASURING THE RADIUS OF CURVATURE OF CONVEX MIRRORS
SAE Technical Papers | 1997
MEASURING THE RADIUS OF CURVATURE OF CONVEX MIRRORS
SAE Technical Papers | 1982