infrared cut-off filters for ccd and cmos imagers · cmos & ccd imagers used in colour hd...
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INFRARED CUT-OFF FILTERS FOR CCD AND CMOS IMAGERS
Knight Optical (UK) Limited © and Knight Optical (USA) LLC © Whilst every effort has been made to verify the information and data, Knight Optical can take no responsibility for its accuracy
All content on this page is protected under the Copyright, Designs and Patents Act 1988 and the Copyright © is owned by Knight Optical (UK) Limited 2011-2015. All rights are reserved. Reproduction of any content, by any means, without the express permission of the owner is prohibited by law. The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trademarks of Knight Optical (UK) Limited. Knight Optical (UK) Ltd is an ISO registered company.
Knight Optical offers a range of custom and stock precision optical solutions for IR cut-off filters, enabling accurate colour replication of CMOS & CCD imagers used in colour HD cameras.
Our IR cut-off filters pass visible wavelengths at over 90% whilst blocking near infrared radiation though means of reflection, therefore protecting the CMOS/ CCD imagers from unwanted light.
Modern camera systems are highly sensitive to infrared light up to around 1000nm which can cause inaccurate colouration. By fitting an IR-cut filter, unwanted infrared light is reflected away from the detector and true to life colour is maintained. Our IR-cut filters are hot mirror coated on a quality borosilicate substrate and offer sharp transitions between the transmitting and reflecting bands to improve accuracy and control over the system.
Borosilicate is chemically resistant to acidic and saline solutions and will not degrade under normal conditions. The substrate has a low thermal expansion meaning the optic can survive rapid changes in temperature while maintaining its structural integrity where other materials might crack or shatter.
Our colour CCD and CMOS IR filters are used in:
ALPR (Automatic Licence Plate Recognition cameras)
USB 3.0 cameras
Motion control cameras
Day/night cameras
HD and imagine cameras
Infrared cut filters are available in Schott D263T material in a range of thicknesses from 0.55, 0.70 and 1.00mm. Other materials available are Quartz or N-BK7 glass.
EU: [email protected]: [email protected]
Knight Optical (UK) Limited © and Knight Optical (USA) LLC © Whilst every effort has been made to verify the information and data, Knight Optical can take no responsibility for its accuracy
All content on this page is protected under the Copyright, Designs and Patents Act 1988 and the Copyright © is owned by Knight Optical (UK) Limited 2011-2015. All rights are reserved. Reproduction of any content, by any means, without the express permission of the owner is prohibited by law. The KNIGHT OPTICAL name and/or mark and KO KNIGHT OPTICAL LOGO are the trademarks of Knight Optical (UK) Limited. Knight Optical (UK) Ltd is an ISO registered company.
For more information or to place an order contact our multilingual technical sales team and discover how Knight Optical’s high quality IR-cut off filters and service can improve your instrumentation and supply chain experience.
Our state of the art Metrology and Quality Assurance department ensure that each component is individually inspected and tested to ensure it meets your exact specification.
Material: Borosilicate/D263T or equivalent
Diameter: +0.0 / -0.20 mm
Length / width: ± 0.20 mm
Thickness: ± 0.20 mm
Surface quality: <60:40 as standard or <20:10 for HD cameras
Transmission: Tmin>90% 420-620nm
Blocking: Tmax<2% 700-1000nm
Surface quality for general purpose filters is 60-40 scratch/dig however for HD cameras for high quality imaging we also offer 20-10 scratch/dig version from stock.
Typical IR-cut off filter specifications are shown below: