Vehicle projection lens and vehicle lamp
AssigneeYoung Optics Inc.
InventorsChen-An Chiang, S-Wei Chen
Life of this patent
Estimating the term…
Abstract
A vehicle projection lens includes a plastic aspheric first lens, an aperture stop, a cemented lens consisting of a glass second lens and a glass third lens, and a glass fourth lens arranged in order from a magnified side to a minified side. An F-number of the vehicle projection lens is smaller than or equal to 0.8, and the vehicle projection lens consists essentially of four lenses respectively with positive, positive, negative and positive refractive powers.
Claims20
A vehicle projection lens, comprising a plastic aspheric first lens, an aperture stop, a cemented lens consisting of a glass second lens and a glass third lens, and a glass fourth lens arranged in order from a magnified side to a minified side, wherein an F-number of the vehicle projection lens is smaller than or equal to 0.8, the vehicle projection lens consists essentially of four lenses respectively with positive, positive, negative and positive refractive powers.
A vehicle projection lens, comprising:
- a non-glass first lens, the non-glass first lens being an aspheric lens and has a largest lens diameter as compared with any other lens in the vehicle projection lens;
- a glass second lens having a positive refractive power;
- a glass third lens having a refractive power;
- a glass fourth lens having a positive refractive power;
- and
- an aperture stop disposed between the first lens and the second lens, the vehicle projection lens consisting essentially of four lenses with refractive powers and having an F-number of smaller than or equal to 0.8.
A vehicle lamp, comprising:
- a light source comprised of an LED array;
- a vehicle projection lens disposed downstream from and in a light path of the light source and consisting essentially of four lenses with refractive powers, and the vehicle projection lens comprising:
- a non-glass first lens, the first lens being an aspheric lens;
- a glass second lens having a positive refractive power;
- a glass third lens having a refractive power;
- a glass fourth lens having a positive refractive power;
- and
- an aperture stop disposed between the first lens and the second lens,
- wherein an F-number of the vehicle projection lens is smaller than or equal to 0.8;
- and
- a vehicle lampshade disposed downstream from and in a light path of the vehicle projection lens.
Dependencies are inferred from the claim text.