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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 |
|
|
|
|
|
$
Order Sample |
Request Volume Quote |
IRC40-6.5R*0.3 |
Reflective Dual-Band cut-off filter with near-IR bandpass centered at 850nm, 6.5mm diameter, 0.3mm thick |
Reflective |
Diameter 6.5 |
0.3 |
$30
Order Sample |
Request Volume Quote |
IRC30-746 |
6.5mm diameter x 0.3mm IRC30 filter |
Reflective |
Diameter 6.5 |
0.3 |
$19.2
Order Sample |
Request Volume Quote |
IRC30-10Rx0.5 |
Reflective IR cut-off filter for CMOS, Dia=10, t=0.5 |
Reflective |
Diameter 10.0 |
0.5 |
$21
Order Sample |
Request Volume Quote |
IRC30-9R*0.5 |
IRC Cut Filter, 9mm Round 0.5mm thick. 650nm cut point |
Reflective |
Diameter 9.0 |
0.5 |
$20.4
Order Sample |
Request Volume Quote |
IRC30-10Rx0.5 |
Reflective IR cut-off filter for CMOS, Dia=10, t=0.5 |
Reflective |
Diameter 10.0 |
0.5 |
$21
Order Sample |
Request Volume Quote |
IRC41-10Rx0.55 |
Precision Reflective IR cut-off filter with near-IR bandpass centered at 850nm, 10mm diameter, 0.55mm thick |
Reflective |
Diameter 10.0 |
0.55 |
$44.4
Order Sample |
Request Volume Quote |
IRC41-15x15x0.55 |
Custom, high-performance IRC40, with narrow bandpass at 850nm |
Reflective |
15.0 x 15.0 |
0.55 |
$54
Order Sample |
Request Volume Quote |
IRC41-10RX0.5-940 |
Dual-band filter, VIS+940nm, 10mm round x 0.55mm thick |
Reflective |
Diameter 10.0 |
0.55 |
$44.4
Order Sample |
Request Volume Quote |
IRC-BP850-10Rx0.5 |
Bandpass filter, 850nm, 10mm round x 0.55mm thick |
Reflective |
Diameter 10.0 |
0.55 |
$32.4
Order Sample |
Request Volume Quote |
IRC950BP-8.8x0.55 |
Band-pass, 950nm, 8.8mm round x 0.55mm thick |
Reflective |
Diameter 8.8 |
0.55 |
$30
Order Sample |
Request Volume Quote |
IRC-BP940-10Rx0.55 |
Bandpass filter, 940nm, 10mm round x 0.55mm thick |
Reflective |
Diameter 10.0 |
0.55 |
$32.4
Order Sample |
Request Volume Quote |
IRC30-15x15-20/10 |
Reflective IR cut-off filter for CMOS, Surface Quality: 20-10 scratch-dig |
Reflective |
15.0 x 15.0 |
1 |
$46.8
Order Sample |
Request Volume Quote |
IRC30-15R |
Reflective IR cut-off filter for CMOS |
Reflective |
Diameter 15.0 |
1 |
$25.2
Order Sample |
Request Volume Quote |
IRC30-25R |
Reflective IR cut-off filter for CMOS |
Reflective |
Diameter 25.0 |
1 |
$30
Order Sample |
Request Volume Quote |
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