Lamp for vehicle
Provided is a lamp for a vehicle capable of ensuring light efficiency to satisfy the performance requirements for light distribution. The lamp includes a light source portion, a first lens portion with a plurality of micro incident lenses onto which light generated by the light source portion is incident, a second lens portion with a plurality of micro exit lenses corresponding to the plurality of micro incident lenses, respectively, and a shielding portion with a plurality of shields that are disposed on rear focal points of the plurality of micro exit lenses to obstruct a portion of incident light. In particular, a focal distance of a micro exit lens among the plurality of micro exit lenses is shorter than a focal distance of a micro incident lens among the plurality of micro incident lenses, which corresponds to the micro exit lens.
1. A lamp for a vehicle comprising:
a light source portion;
a first lens portion that includes a plurality of micro incident lenses onto which light generated by the light source portion is incident;
a second lens portion that includes a plurality of micro exit lenses corresponding to the plurality of micro incident lenses, respectively; and
a shielding portion that includes a plurality of shields, each of which is disposed at each rear focal point of the plurality of micro exit lenses to obstruct a portion of light that is incident onto the plurality of micro exit lenses,
wherein a focal distance of a micro exit lens among the plurality of micro exit lenses is designed to be shorter than a focal distance of a micro incident lens among the plurality of micro incident lenses, which corresponds to the micro exit lens, to cause light that passes the rear focal point to be incident onto and exit the micro exit lens with a light efficiency equal to or greater than a predetermined minimum light efficiency.
2. The lamp of claim 1 , wherein each of the plurality of micro incident lenses is a semicylindrical lens that extends in one direction, and
wherein light which exits from the semicylindrical lens is incident onto at least one of the plurality of micro exit lenses, which is arranged in the one direction in which the semicylindrical lens extends.
3. The lamp of claim 1 , wherein the focal distance of the micro exit lens is 40% to 80% of the focal distance of the micro incident lens.
4. The lamp of claim 1 , wherein in the first lens portion, the plurality of micro incident lenses are formed on a surface of a first light transmission portion, which faces a direction toward the light source portion,
wherein in the second lens portion, the plurality of micro exit lenses are formed on a surface of a second light transmission portion, from which light exits, and
wherein the first light transmission portion and the second light transmission portion are disposed such that mutually facing surfaces abut each other.
5. The lamp of claim 4 , wherein the plurality of shields are formed by a deposition on a surface of the second light transmission portion, which faces the first light transmission portion.
6. The lamp of claim 4 , wherein the first light transmission portion has a thickness corresponding to the focal distance of the micro incident lens, and
wherein the second light transmission portion has a thickness corresponding to the focal distance of the micro exit lens.
7. The lamp of claim 1 , wherein the light source portion comprises a light source and a light guide portion configured to guide the light generated by the light source to the first lens portion by adjusting an optical path of the light to be parallel to an optical axis of the light source.
8. The lamp of claim 7 , wherein the light guide portion is a Fresnel lens.
9. The lamp of claim 1 , wherein a curvature of an exit surface of the micro exit lens increases as the focal distance of the micro exit lens decreases.
10. The lamp of claim 1 , wherein the shielding portion is disposed closer to the second lens portion than the first lens portion.
11. The lamp of claim 1 , wherein a cut-off line of each of the plurality of shields is connected to cut-off lines of adjacent shields.