Title:
赤外線フィルタ構成
Document Type and Number:
Japanese Patent JP6560333
Kind Code:
B2
Abstract:
An IR filter arrangement for a camera having an associated IR illuminator, the arrangement comprising
- a fixedly arranged bandpass IR filter filtering out IR frequencies other than those from the IR illuminator, and
- an IR cut filter at least blocking any IR wavelength transmitted by the fixed band-pass filter, said IR filter being integrated in a diaphragm of the camera, such that closing of the diaphragm aperture entails an increased relative proportion of the diaphragm aperture being covered by the IR cut filter, and opening of the diaphragm aperture entails a decreased relative proportion of the diaphragm aperture being covered by the IR cut filter.
Inventors:
Chelmström, Jonas
Lundberg, Stefan
Lundberg, Stefan
Application Number:
JP2017243814A
Publication Date:
August 14, 2019
Filing Date:
December 20, 2017
Export Citation:
Assignee:
Axis Arb
International Classes:
G03B11/00; G02B5/22; G03B9/02; H04N9/07
Domestic Patent References:
| JP2006078666A | ||||
| JP2016184082A | ||||
| JP2014225828A | ||||
| JP2004361590A | ||||
| JP2013152369A |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation