Patent ID: 9654748
Date: 2017-05-16
CPC Classifications: G01B,H04N

Claim:
1. A projection device comprising: a projection unit for radiating on a projection target object in a time-divided manner, in one frame period of a video, a visible light image that is based on a video signal and a plurality of measurement pattern images by an invisible light image, the plurality of measurement pattern images having spatially different slit widths respectively; an imaging unit for imaging the plurality of measurement pattern images projected on the projection target object, and generating a measurement image based on the plurality of measurement pattern images imaged by the imaging unit; and a controller configured to acquire predetermined information and to generate a video signal for projection, wherein the controller controls an order of a radiation period for the visible light image and a radiation period for the plurality of measurement pattern images by the invisible light image in the one frame period, and wherein the controller includes, as a radiation mode, a first mode for radiating the plurality of measurement pattern images by the invisible light image in a manner of distributing the invisible light image over a plurality of periods within the one frame period.