Infrared Transmitting Visible Absorbing Glass
- Product Item : AT-61068
- Category： Optical Cover Glass Materials
- Product description：
Infrared transmitting visible absorbing glass is a special type of optical glass characterized by its high absorption of visible light(400-760 nm)and high transmission of specific infrared wavelengths(typically 760 nm-25μm),achieving the optical function of"blocking visible light while transmitting infrared light".
Core Characteristics
Strong Spectral Selectivity:Precisely separates visible light from infrared light,with visible light transmittance typically below 5%and transmittance of specific infrared wavelengths reaching over 70%.
High Stability:Physically and chemically stable,resistant to high temperatures and humidity,with no significant spectral drift or performance degradation over long-term use.
Good Processability:Can be manufactured into various forms such as flat plates,lenses,and window panes to meet the structural requirements of different optical components.
Main Functions
Filtering Function:Efficiently filters out visible light interference,allowing only the target infrared wavelength light to pass through,enhancing the signal-to-noise ratio of infrared detection systems.
Thermal Insulation Function:Blocks the heat carried by visible light(such as the visible light thermal radiation in sunlight)while not affecting infrared signal transmission,providing dual functions of"light transmission(infrared)"and"thermal insulation".
Protection Function:Protects infrared detectors from radiation damage caused by visible light and ultraviolet rays,extending the service life of the devices.
Application Ranges
Infrared Detection and Imaging:Optical windows/filters for infrared thermometers,infrared thermal imagers,and infrared cameras,ensuring that the devices only receive infrared signals.
Security and Surveillance:Lens glass for nighttime infrared surveillance systems,avoiding visible light interference and enhancing nighttime infrared imaging clarity.
Industrial and Medical:Protective windows for industrial infrared heating equipment(such as infrared dryers),optical components for medical infrared diagnostic instruments(such as infrared thermometers).
Military and Aerospace:Optical windows for military infrared-guided weapons,filter elements for satellite infrared remote sensing systems,meeting the infrared signal transmission requirements under harsh environmental conditions.
Parameters
Characteristics
|
Grade |
Thickness (mm) |
A[ 2856k]
|
D65
|
Chemical Stability
|
ND |
α×10⁻⁷ (°C⁻¹) |
Tg (°C) |
Ts (°C) |
S |
|||||
|
x |
y |
Y |
x |
y |
Y |
DA |
DW |
|||||||
|
AT1 |
1 |
0.612 |
0.260 |
0.2 |
0.3 25 |
0.111 |
0.1 |
1 |
3 |
1.525 |
|
|
|
2.53 |
|
AT3 |
1 |
|
|
|
|
|
|
1 |
3 |
1.525 |
|
|
|
2.53 |
|
AT4 |
1 |
|
|
|
|
|
|
1 |
3 |
1.5253 |
|
|
|
2.53 |
Technical Requirements
|
Grade |
Thickness (mm) |
400 (nm) |
700 (nm) |
800 (nm) |
860 (nm) |
900 (nm) |
1100 (nm) |
|
AT1 |
1 |
≤14.0 |
≤6.0 |
≤30.0 |
|
|
≥85.5 |
|
AT3 |
1 |
≤0.5 |
≤1.0 |
|
≤37.0 |
|
≥75.0 |
|
AT4 |
1 |
≤0.1 |
|
≤5.0 |
|
≤38.0 |
≥75.0 |
Bubbles, Streaks, Stress Levels
|
Grade |
Bubbles |
Streaks |
Stress |
|
AT1 |
C-B |
4 |
3 |
|
AT3 |
C-B |
4 |
3 |
|
AT4 |
C-B |
4 |
3 |
