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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 IR cut-off filters, IRC20 and IRC21, and two types of reflective IR filters, IRC30 and IRC40. The IRC40 is a specialized reflective filter suitable for day/night cameras that allows both visible and 850nm infrared LED light to transmit. The absorptive filters are recommended for CCD imagers while the reflective are recommended for CMOS imagers. Our standard off-the-shelf filters are listed below. If you need a custom filter, please contact our support.

Narrow down IR cut-off filter choices by the following options:

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
IRC20-10R Absorptive IR cut-off filter for CCD Absorptive Diameter 10.0 2 $12.5
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IRC20-10S Absorptive IR cut-off filter for CCD Absorptive 10.0 x 10.0 2 $12.5
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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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IRC21-25R Absorptive IR cut-off filter for CMOS Absorptive Diameter 25.0 1.2 $30
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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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IRC21-50R Absorptive IR cut-off filter with AR coating for CMOS Absorptive Diameter 50.0 1.2 $39
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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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IRC21-8R Absorptive IR cut-off filter for CMOS Absorptive Diameter 8.0 1.2 $12.5
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IRC21-JB450-BBAR-12Rx2.2 Absorptive IR cut-off filter and bandpass filter, S1/S2 coated BBAR for visible Absorptive Diameter 12.0 2.2 $60
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IRC30-10R Reflective IR cut-off filter for CMOS Reflective Diameter 10.0 1 $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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IRC30-15x15-20/10 Reflective IR cut-off filter for CMOS, Surface Quality: 20-10 scratch-dig Reflective 15.0 x 15.0 1 $39
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IRC30-25R Reflective IR cut-off filter for CMOS Reflective Diameter 25.0 1 $25
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IRC30-50x50 Reflective IR cut-off filter for CMOS Reflective 50.0 x 50.0 1.5 $39
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