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Infrared (IR) cut-off filters are used with color CCD or CMOS imagers to produce accurate color images.  An IR cut-off filter blocks the transmission of the infrared while passing the visible.  This can be done with two optical techniques: absorption or reflection.  Absorptive filters are made with special optical glass that absorbs near infrared radiation.  Reflection type filters are short-pass interference filters that reflect infrared light with high efficiency.

We offer two types of absorptive filters: IRC20 and IRC21 and two types of reflective IR filters: IRC30 and IRC40 which is a new type of reflective filter suitable for day/night security cameras.  It allows both visible and infrared LED light to pass through.  The absorptive filters are recommended for CCD imagers while the reflective CMOS imagers.  Our standard off-the-shelf filters are listed blow. If you need a custom filter, please contact our support.

General Specifications:

Parameter Value
Default unit mm
Default effective aperture 90%
Material Schott D263T or BK7 equivalent for coating filters
Absorptive optical glasses for absorptive filters
Dimensional tolerance: +/-0.1mm typical
Thickness(mm): Coating filters: Schott D263T glass: 0.3, 0.5, 0.7 and 1.0mm.  Other thickness available for BK7 glass
Absorptive filters: determined by the absorption requirement
Surface quality 60/40 scratch/dig.  Grade 20/10 or better is also available on custom basis.
Spectral transmittance (typical values, not specifications)  

PN Description Type Size Thickness Sample Price (1-99) Volume Price
IRC20-10S Absorptive IR cut-off filter for CCD Absorptive 10.0 x 10.0 2 $12.5
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IRC21-8R Absorptive IR cut-off filter for CMOS Absorptive Diameter 8.0 1.2 $12.5
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IRC20-10R Absorptive IR cut-off filter for CCD Absorptive Diameter 10.0 2 $12.5
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IRC30-6R DISCONTINUED! Specially priced until out of inventory. Reflective IR cut-off filter for CMOS, Dia=6, t=1 Reflective Diameter 6.0 1 $12.5
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IRC30-7x7 DISCONTINUED! Specially priced until out of inventory. Reflective IR cut-off filter for CMOS Reflective 7.0 x 7.0 1 $12.5
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IRC21-8.75x8.75x1.0 Absorptive IR Cut Filter specifically sized for Pixim CMOS sensors Absorptive 8.75 x 8.75 1 $15
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IRC30-10R Reflective IR cut-off filter for CMOS Reflective Diameter 10.0 1 $17.5
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IRC21-12R Absorptive IR cut-off filter for CMOS Absorptive Diameter 12.0 1.2 $17.5
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IRC30-15R Reflective IR cut-off filter for CMOS Reflective Diameter 15.0 1 $21
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IRC30-15x15 Reflective IR cut-off filter for CMOS Reflective 15.0 x 15.0 1 $21
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IRC30-25R Reflective IR cut-off filter for CMOS Reflective Diameter 25.0 1 $25
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IRC40-10R Reflective IR cut-off Day/Night filter with near-IR bandpass Reflective Diameter 10.0 1 $27
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IRC30-9R-20/10 Reflective IR cut-off filter for CMOS, Surface Quality: 20-10 scratch-dig Reflective Diameter 9.0 1 $27
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IRC21-25S Absorptive IR cut-off filter for CMOS Absorptive 25.0 x 25.0 1.2 $30
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IRC21-25R Absorptive IR cut-off filter for CMOS Absorptive Diameter 25.0 1.2 $30
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