---
publication_id: "OT-2026-000000849"
title: "Three-dimensional measurement device"
published_at: "2026-09-15T19:03:29.335930Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000000849"
categories:
  - "sensors-controls-machine-vision/position-and-presence-sensing"
keywords:
  - "g01b11/2441"
  - "g01b11/25"
  - "g01b9/023"
  - "g06t2207/30148"
  - "g06t7/70"
---

# Three-dimensional measurement device

## Abstract

A three-dimensional measurement device includes: an irradiator that emits a predetermined light; an optical system that splits the predetermined light into two lights, irradiates a measurement object with a measurement light and irradiates a reference plane with a reference light, and emits a combined light; an imaging device that takes an image of the combined light and obtains an interference fringe image; an objective lens for the measurement light that directs the measurement light toward the measurement object; an objective lens for the reference light that directs the reference light toward the reference plane; an imaging lens that forms an image of the combined light on the imaging device; and a control device that executes three-dimensional measurement of a measurement area on the measurement object based on the interference fringe image.