Patent ID: 9719656
Date: 2017-08-01
CPC Classifications: F21V,F21Y,G02B

Claim:
1. An aspheric lens, which is configured to rotate symmetrically about a central optical axis, the aspheric lens comprising: a first optical surface; and a second optical surface opposite to the first optical surface and having a first portion formed in a rotation symmetrical formed with the central optical axis, wherein the first portion is flat; wherein the aspheric lens includes a light emitting device corresponding to the first optical surface, the light emitting device includes a plurality of light points, the first portion of the second optical surface is configured so as to satisfy in a relation θ wherein the second optical surface includes a second portion formed a first curve surface, a slope of the first curve surface is larger than zero, the second portion of the second optical surface is configured so as to satisfy in the relation θ