Projection lens and system for LED light source and vehicle

• Main Authors: YANG ZHI, NA FARUI, LI HAITAO, ZHANG YI, JIN RUHE, PANG HONGLI, WEI CHAOQIAO, WANG QIANG
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2021
• Subjects: BLASTING; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

The invention relates to the technical field of illumination, and provides a projection lens and system for an LED light source and a vehicle. The projection lens comprises a first lens, a second lens, a third lens and a light outlet diaphragm which are sequentially arranged along an optical axis from an object side to an image side, wherein each lens is provided with an object side surface facing the object side and an image side surface facing the image side, the first lens has positive refractive power, the object side surface and the image side surface of the first lens are both convex spherical surfaces, the second lens has negative refractive power, and the object side surface and/or the image side surface of the second lens are/is aspheric surfaces; the third lens has positive refractive power, and the object side surface and/or the image side surface of the third lens are/is aspheric surfaces; and the resolution of the projection lens is not less than the physical resolution of the LED light source, t