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RSA110F1.3-640-17
Rising
The 110mm F1.3 Infrared Athermal Lens is a precision-engineered LWIR (8–14μm) lens designed for 640×512 / 17µm thermal detectors. Featuring an athermalized optical design, it ensures stable focus and imaging performance across wide temperature variations, making it highly reliable for outdoor, automotive, and mission-critical applications.
With its long focal length and F1.3 aperture, the lens provides extended detection range, high thermal sensitivity, and consistent clarity—even in challenging environmental conditions.
| Product Name | Infrared Lens |
| Focal Length | 110mm |
| F# | 1.3 |
| Image Diagonal | 13.94mm (pixel 17um) |
| Detector | 640x512-17um |
| Average Transmission | ＞91% |
| Circular FOV | (H)5.6°x(V)4.5°x(D)7.2° |
| Back Focus Distance | 18.29mm |
| Back Working Distance | 10.29mm |
| Back Focus Length | 26.85mm |
| Dimensions | 90mm / 131mm |
| Focus Type | Fixed Focal |
| Focus Range | 15m to infinity |
| Mount Type | M59x0.75-6g |
| Weight | 677g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
Infrared Sights & Scopes – Long-range target acquisition with stable imaging
Thermal Imaging Cameras – High-resolution thermal detection systems
Automotive Monitoring – Vehicle-mounted infrared vision for ADAS & night driving
Industrial Monitoring – Reliable thermal inspection under variable conditions
Q1: What Materials Are Suitable For Infrared Lenses?
When designing infrared optical elements, various factors related to the optical material used must be considered. These factors include refraction properties, light transport, non-thermal properties, hardness/durability, environmental sensitivity, weight/density, manufacturing technology, and cost.
Some of these factors are still interrelated. For example, for some materials, their optical transmittance is higher at room temperature, but decreases at higher temperatures. With all these factors in mind, material selection needs to be carefully considered when designing infrared optical elements.
Available materials are:Silicon (Si), gallium arsenide (GaAs) and cadmium telluride (CdTe); Zinc compounds, such as zinc sulfide (ZnS) and zinc selenide (ZnSe); Water-soluble crystals such as potassium bromide (KBr), sodium chloride (NaCl), and potassium chloride (KCl); Magnesium fluoride (MgF 2), calcium fluoride (CaF 2), barium fluoride (BaF 2) and other fluorides. And other materials, such as fused quartz and sapphire; Chalcogenide glass, etc.,
Q2: Can this lens be customized?
Absolutely. We offer custom designs for focal length, aperture, and mechanical housing based on customer requirements.
Q3: What is the advantage of an athermalized lens?
It maintains sharp focus across wide temperature ranges, avoiding image blur caused by thermal expansion.
The 110mm F1.3 Infrared Athermal Lens is a precision-engineered LWIR (8–14μm) lens designed for 640×512 / 17µm thermal detectors. Featuring an athermalized optical design, it ensures stable focus and imaging performance across wide temperature variations, making it highly reliable for outdoor, automotive, and mission-critical applications.
With its long focal length and F1.3 aperture, the lens provides extended detection range, high thermal sensitivity, and consistent clarity—even in challenging environmental conditions.
| Product Name | Infrared Lens |
| Focal Length | 110mm |
| F# | 1.3 |
| Image Diagonal | 13.94mm (pixel 17um) |
| Detector | 640x512-17um |
| Average Transmission | ＞91% |
| Circular FOV | (H)5.6°x(V)4.5°x(D)7.2° |
| Back Focus Distance | 18.29mm |
| Back Working Distance | 10.29mm |
| Back Focus Length | 26.85mm |
| Dimensions | 90mm / 131mm |
| Focus Type | Fixed Focal |
| Focus Range | 15m to infinity |
| Mount Type | M59x0.75-6g |
| Weight | 677g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
Infrared Sights & Scopes – Long-range target acquisition with stable imaging
Thermal Imaging Cameras – High-resolution thermal detection systems
Automotive Monitoring – Vehicle-mounted infrared vision for ADAS & night driving
Industrial Monitoring – Reliable thermal inspection under variable conditions
Q1: What Materials Are Suitable For Infrared Lenses?
When designing infrared optical elements, various factors related to the optical material used must be considered. These factors include refraction properties, light transport, non-thermal properties, hardness/durability, environmental sensitivity, weight/density, manufacturing technology, and cost.
Some of these factors are still interrelated. For example, for some materials, their optical transmittance is higher at room temperature, but decreases at higher temperatures. With all these factors in mind, material selection needs to be carefully considered when designing infrared optical elements.
Available materials are:Silicon (Si), gallium arsenide (GaAs) and cadmium telluride (CdTe); Zinc compounds, such as zinc sulfide (ZnS) and zinc selenide (ZnSe); Water-soluble crystals such as potassium bromide (KBr), sodium chloride (NaCl), and potassium chloride (KCl); Magnesium fluoride (MgF 2), calcium fluoride (CaF 2), barium fluoride (BaF 2) and other fluorides. And other materials, such as fused quartz and sapphire; Chalcogenide glass, etc.,
Q2: Can this lens be customized?
Absolutely. We offer custom designs for focal length, aperture, and mechanical housing based on customer requirements.
Q3: What is the advantage of an athermalized lens?
It maintains sharp focus across wide temperature ranges, avoiding image blur caused by thermal expansion.
