Color Filter Glass : Products & Services

Infrared Transmitting Filters

Infrared-transmitting filters absorb most of the visible region and transmit the infrared region. They include the R and IR series, which sharply cut off part of the infrared, the RM series, which smoothly and gradually cut them off, and the RT series which band-pass the infrared region.

They are widely used in light sources for such purposes as infrared warning systems and night-vision equipment.

Color Filter Glass : Infrared Transmitting Filter Data
print-friendly data tabledefinition of terms
Item / Filter Type Standard Value Color Specification (Standard illuminants A) Thickness Reflective Index Chemical Properties Thermal Properties Mechanical Properties Specific Gravity
λT (nm) Δλ (nm) TH (%) x y mm nd Dw DA Tg TS α -30/70 α 100/300 HK FA S
R-70 700±10 <45 >85 - - 2.5 - 1 3 525 575 98 115 470 160 2.86
R-72 720±10 <45 >85 - - 2.5 - 1 3 525 575 100 116 470 160 2.86
IR-76 760±10 <60 - - - 2.5 - 1 2 495 545 89 99 500 160 2.84
IR-80 800±10 <60 - - - 2.5 - 1 3 495 550 87 100 500 160 2.85
IR-83 830±10 <60 - - - 2.5 - 2 4 500 555 99 109 500 160 2.99
IR-85 850±10 <60 - - - 2.5 - 1 4 490 535 92 102 500 150 3.02
 
Item / Filter Type Standard Value Color Specification (Standard illuminants A) Thickness Reflective Index Chemical Properties Thermal Properties Mechanical Properties Specific Gravity
λ5 (nm) λ80 (nm) x y mm nd Dw DA Tg TS α -30/70 α 100/300 HK FA S
RM-90 770 1050 - - 2.5 - 3 3 440 490 107 125 450 170 3.15
RM-100 850 1200 - - 2.5 - 3 4 450 490 98 115 460 180 3.23
 
Item / Filter Type Standard Value Color Specification (Standard illuminants A) Thickness Reflective Index Chemical Properties Thermal Properties Mechanical Properties Specific Gravity
T830 (%) T700 (%) T1200 (%) x y mm nd Dw DA Tg TS α -30/70 α 100/300 HK FA S
RT-830 82±5 <5 <1.0 - - 2.5 - 1 1 545 605 91 101 510 140 2.75
print-friendly data table
λT(nm): Transition Wavelength. It is defined as the wavelength at the mid-point of the transition interval.
Δλ(nm): Transition Interval. It is defined as the mean distance between the point of 72% transmittance and the point of 5% transmittance.
TH(%): Average High Transmittance. It is expressed by the average transmittance for the high transmittance range which extends from the high transmittance limit wavelength to 800nm.
λ5 (nm) Wavelength for less than 5% transmittance
λ80 (nm) Wavelength for over 80% transmittance

Note: The listed data are standard value. Because of continuous product improvement, the various data listed are subject to change without notice.