Patent ID: 9732931
Date: 2017-08-15
CPC Classifications: F21V,F21Y

Claim:
1. A light-emitting module comprising: a light source emitting an original beam along a direction of a light-emitting axis; and an optical lens disposed on a transmission path of the original beam, the original beam passing the optical lens and becoming an illumination beam, wherein a light shape of the illumination beam has a first full width at half maximum along a first direction and has a second full width at half maximum along a second direction, a ratio of the second full width at half maximum to the first full width at half maximum is large than 3, and the first direction and the second direction are perpendicular to the direction of the light-emitting axis, wherein a numerator of the ratio is the second full width at half maximum, and a denominator of the ratio is the first full width at half maximum.