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Title:
FOCUSING OF CAMERA MONITORING SCENE
Document Type and Number:
Japanese Patent JP2018138988
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent a photographed image from being influenced by irradiation of an object with light emitted from an IR laser range meter.SOLUTION: A monitoring camera 100 has a day photographing mode, where an IR cut filter 112 is inserted in a photographing optical path, and a night photographing mode, where the IR cut filter 112 is taken off the photographing optical path. In focusing of the monitoring camera 100, day mode focusing or night mode focusing is selected on the basis of whether the monitoring camera 100 is in the day photographing mode or night photographing mode. An IR laser range meter 110 is configured in the day mode focusing to continuously operate to measure a distance, but configured in the night mode focusing to only measure a distance during a predetermined period of time in response to a focus trigger signal being activated, so that a photographed image in the night photographing mode is less influenced by IR light for distance measurement. The focusing is performed on the basis of a result of distance measurement by means of the IR laser range meter 110.SELECTED DRAWING: Figure 1

Inventors:
フランソン, ケント
バーリルンド, ビョルン
Application Number:
JP2017231461A
Publication Date:
September 06, 2018
Filing Date:
December 01, 2017
Export Citation:
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Assignee:
アクシス アーベー
International Classes:
G02B7/28; G03B11/00; G03B13/36; G03B15/00; G03B17/56; H04N5/225; H04N5/232; H04N5/243
Domestic Patent References:
JP2005242105A2005-09-08
Foreign References:
US20160142681A12016-05-19
US20140063261A12014-03-06
CN204836402U2015-12-02
Attorney, Agent or Firm:
園田・小林特許業務法人