OPTICAL PATTERN GENERATION DEVICE

• Main Authors: YANAGISAWA, Takayuki, TAKADA, Yukari
• Format: Patent
• Language: English; French; German
• Published: 29.04.2020
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

An optical pattern generation device according to the present invention includes: a first laser light source for emitting first laser light; a first diffractive optical element for changing a phase of the first laser light depending on a position on a plane perpendicular to a propagating direction of the first laser light, and emitting laser light having a phase distribution; a second diffractive optical element for changing a phase of incident laser light depending on a position on a plane perpendicular to a propagating direction of the incident laser light, and emitting laser light for forming an optical pattern; and a transfer optical system disposed between the first and second diffractive optical elements, for transferring the phase distribution of the laser light emitted from the first diffractive optical element to a phase distribution of laser light incident on the second diffractive optical element. This configuration enables the second diffractive optical element to be simply designed without consideration of a change in a wavefront due to propagation of light output from the first diffractive optical element.