Patent ID: 9423356
Filing Date: 2016-08-23
CPC Classification: G01N,G02B

Claim Text:
1. An illumination apparatus comprising: a light source that emits a laser beam; and two lens arrays to which the laser beam is illuminated, a plurality of element lenses, each element lens having a diameter greater than or equal to that of the laser beam, arranged in the lens arrays, the lens arrays being rotatable through an optical axis of the laser beam, wherein the two lens arrays are arrayed in an optical axis direction of the laser beam, and the element lenses in each lens array are arranged such that a boundary between the element lenses adjacent to each other radiates from a rotation center of the lens array and such that a direction in which the element lens of one of the lens arrays traverses the optical axis of the laser beam is orthogonal to a direction in which the element lens of the other lens array traverses the optical axis of the laser beam.