Patent ID: 8226275

Claim:
An optical emitting module comprising: a light-emitting device that emits light; and a lens member having a refracting surface configured to refract light emitted from the light-emitting device and to emit the refracted light, wherein the lens member is configured such that, when the angle of a light beam emitted from the lens member with respect to a principal light axis is θ 1 , a light beam with the maximum emission angle θ 1 from the lens member is emitted from a refracting surface in the vicinity of a point where the refracting surface and the principal light axis cross each other, and wherein the lens member is configured such that, when the angle of a light beam emitted from the light-emitting device with respect to the principal light axis is θ 0 , a light beam with a smaller emission angle θ 0 from the light-emitting device is emitted from the lens member with a larger emission angle θ 1 .