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RSA11F1.2-640-12
Rising
The FL 11mm F1.2 LWIR Athermal Lens is a long-wave infrared (8–14μm) fixed-focus lens engineered for 640×512 / 12µm uncooled detectors. Featuring an athermalized optical design, it ensures stable imaging performance across wide temperature ranges, eliminating focus drift caused by thermal expansion.
With its large aperture (F1.2) and ultra-wide field of view, this lens delivers high sensitivity and reliable full-scene coverage, making it ideal for surveillance, perimeter defense, firefighting, automotive night vision, and UAV inspections.
| Product Name | Infrared Athermal Lens |
| Focal Length | 11mm |
| F# | 1.2 |
| Image Diagonal | 9.84mm |
| Detector | 640x512-12um |
| Average Transmission | ＞92% |
| Circular FOV | (H)39.6°x(V)31.6°x(D)50.5° |
| Back Focus Distance | 15mm |
| Back Working Distance | 8.3mm |
| Back Focus Length | 8.8mm |
| Dimensions | 23mm / 19.93mm |
| Focus Type | Fixed Focal |
| Focus Range | 0.3m to infinity |
| Mount Type | M20x0.5-6g |
| Weight | 19g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
Athermalized Design – Maintains stable imaging across varying environmental temperatures
Large Aperture (F1.2) – High sensitivity, optimized for low-contrast and low-light conditions
LWIR 8–14μm Transmission – Effective through smoke, haze, and total darkness
Optimized for 640×512 / 12µm Detectors – Delivers sharp and detailed thermal imagery
Provides panoramic coverage for critical infrastructure, borders, and facility protection
Detects thermal signatures across expansive zones with high accuracy
Wide scanning capability for smoke-filled or dark environments
Helps identify fire sources and trapped individuals in real time
Enables drivers to detect pedestrians, animals, and obstacles in poor visibility
Enhances safety in night driving and all-weather conditions
Lightweight and compact design suitable for aerial payloads
Broad-area scanning during flight for inspection, mapping, or search-and-rescue
Q1: Why is an athermal design important?
It ensures focus stability and prevents image degradation caused by temperature changes, especially critical for outdoor and vehicle-mounted systems.
Q2: Can this lens be integrated into UAVs?
Yes, its compact and lightweight design makes it suitable for drone-based thermal payloads.
Q3: Is the lens suitable for 17µm detectors?
This model is specifically optimized for 640×512 / 12µm detectors. Variants can be customized for other formats.
The FL 11mm F1.2 LWIR Athermal Lens is a long-wave infrared (8–14μm) fixed-focus lens engineered for 640×512 / 12µm uncooled detectors. Featuring an athermalized optical design, it ensures stable imaging performance across wide temperature ranges, eliminating focus drift caused by thermal expansion.
With its large aperture (F1.2) and ultra-wide field of view, this lens delivers high sensitivity and reliable full-scene coverage, making it ideal for surveillance, perimeter defense, firefighting, automotive night vision, and UAV inspections.
| Product Name | Infrared Athermal Lens |
| Focal Length | 11mm |
| F# | 1.2 |
| Image Diagonal | 9.84mm |
| Detector | 640x512-12um |
| Average Transmission | ＞92% |
| Circular FOV | (H)39.6°x(V)31.6°x(D)50.5° |
| Back Focus Distance | 15mm |
| Back Working Distance | 8.3mm |
| Back Focus Length | 8.8mm |
| Dimensions | 23mm / 19.93mm |
| Focus Type | Fixed Focal |
| Focus Range | 0.3m to infinity |
| Mount Type | M20x0.5-6g |
| Weight | 19g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
Athermalized Design – Maintains stable imaging across varying environmental temperatures
Large Aperture (F1.2) – High sensitivity, optimized for low-contrast and low-light conditions
LWIR 8–14μm Transmission – Effective through smoke, haze, and total darkness
Optimized for 640×512 / 12µm Detectors – Delivers sharp and detailed thermal imagery
Provides panoramic coverage for critical infrastructure, borders, and facility protection
Detects thermal signatures across expansive zones with high accuracy
Wide scanning capability for smoke-filled or dark environments
Helps identify fire sources and trapped individuals in real time
Enables drivers to detect pedestrians, animals, and obstacles in poor visibility
Enhances safety in night driving and all-weather conditions
Lightweight and compact design suitable for aerial payloads
Broad-area scanning during flight for inspection, mapping, or search-and-rescue
Q1: Why is an athermal design important?
It ensures focus stability and prevents image degradation caused by temperature changes, especially critical for outdoor and vehicle-mounted systems.
Q2: Can this lens be integrated into UAVs?
Yes, its compact and lightweight design makes it suitable for drone-based thermal payloads.
Q3: Is the lens suitable for 17µm detectors?
This model is specifically optimized for 640×512 / 12µm detectors. Variants can be customized for other formats.
