OPTICAL SCANNER

• Main Authors: TOYOTA, Yuichi, SASAKI, Hikaru, MORIGUCHI, Chihiro, BEPPU, Taro
• Format: Patent
• Language: English
• Published: 27.07.2023
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

An optical scanner includes a light receiving unit, a reference light irradiating unit, and a light-receiving-side correcting unit. The light receiving unit includes an optical phased array that implements scanning by a light beam by individually controlling phases of a plurality of branched lights using a scanning phase amount. The reference light irradiating unit generates reference light and irradiate the reference light onto the light receiving unit. The light-receiving-side correcting unit estimates a phase shift amount that occurs in the plurality of branched lights as a result of distortion of a substrate on which the light receiving unit is mounted from a detection result of the light receiving unit onto which the reference light is incident, and sets a phase adjustment amount to be applied to the plurality of branched lights such that the estimated phase shift amount decreases.