Title:
DISTANCE MEASURING DEVICE, DISTANCE MEASURING METHOD, AND IMAGE PROCESSING DEVICE EQUIPPED WITH DISTANCE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP2019168397
Kind Code:
A
Abstract:
To solve the problem that, in order to avoid damaging a user's health by an inadvertent direct gaze, a laser beam for measuring the distance to an object is required not to have excessively large output, but when output is low, the accuracy of measuring the distance to a remote object decreases, which may result in miscalculating the distance to an object when the distance is determined by one instance of measurement, while this will not cause a significant problem when it comes to a near object, even if the distance is determined by a few instances of measurement.SOLUTION: The present invention includes long distance measurement for determining the distance to an object using the results of multiple instances of measurement so that it is possible to detect even when a user is present a far away, and short distance measurement for determining the distance to an object using the results of a fewer number of measurements than the multiple measurements when it is determined that a user is present in a range nearer than a reference distance.SELECTED DRAWING: Figure 6A
Inventors:
KUBOTA TSUTOMU
Application Number:
JP2018057875A
Publication Date:
October 03, 2019
Filing Date:
March 26, 2018
Export Citation:
Assignee:
CANON KK
International Classes:
G01C3/06; G03G21/00
Attorney, Agent or Firm:
Hinoki International Patent Office