Athermalized LWIR Lens 3.5mm F/1.0 Description
Athermalized LWIR Lens 3.5mm F/1.0 emerges as a top-tier solution for high-performance long-wave infrared imaging across a wide range of demanding applications. Its compact 3.5mm focal length combined with a wide f/1.0 aperture ensures exceptional image clarity and sensitivity, while the athermalized design maintains optical stability across varying thermal environments, eliminating the need for constant recalibration. Whether utilized in surveillance, industrial inspection, medical diagnostics, or aerospace missions, this lens delivers reliable and precise thermal imaging, enhancing operational efficiency and safety. Engineered with superior materials and meticulous craftsmanship, the Athermalized LWIR Lens 3.5mm F/1.0 is the ideal choice for professionals seeking consistent, high-quality infrared performance in every scenario.
Athermalized LWIR Lens 3.5mm F/1.0 Specifications

HFOV
|
160x120
|
320x256
|
384x288
|
640x512
|
17μm
|
42.5
|
75.7
|
86
|
-
|
12μm
|
30.7
|
57.5
|
66.7
|
95.3
|
Optical Properties
Focal Length (mm)
|
3.5mm
|
F/#
|
1.0
|
Average Transmission
|
>85%
|
Back Focal Length
|
8.87mm
|
Environmental Durability
Operating Temperature
|
-40℃ to +60℃
|
Storage Temperature
|
-50℃ to +70℃
|
Protection Rating
|
IR67
|
First Surface Coating
|
AR
|
Mechanical Properties
Focusing Range
|
0.3m~∞
|
Back Working Distance
|
8mm
|
Detector Interface Size
|
M25 x 0.5-6g
|
Overall Dimensions (mm)
|
Φ35 x 33
|
Weight
|
50g
|
*For drawing, please contact us.
Athermalized LWIR Lens 3.5mm F/1.0 Application
· Thermal Imaging Cameras: Enhances the detection of heat signatures for both commercial and military applications, delivering clear and detailed images under a variety of lighting conditions.
· Surveillance Systems: Boosts security monitoring by providing dependable infrared imaging across a wide range of environmental temperatures, eliminating the need for frequent recalibrations.
· Industrial Inspection: Enables non-destructive testing and monitoring of machinery, electrical systems, and infrastructure by identifying thermal anomalies, thereby preventing equipment failures.
· Environmental Monitoring: Supports the observation of natural phenomena, such as wildlife behavior and habitat changes, through consistent thermal imaging regardless of temperature fluctuations.
Athermalized LWIR Lens 3.5mm F/1.0 Packing
Our Athermalized LWIR Lens 3.5mm F/1.0 is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
FAQs
Q1: What is an athermalized IR lens?
An athermalized IR lens is designed to maintain focus across varying temperatures without needing manual adjustment. It automatically compensates for thermal expansion and contraction, which can affect image clarity in infrared imaging applications.
Q2: How does an athermalized IR lens work?
It uses materials with differing thermal expansion rates or unique mechanical designs to counteract temperature-induced focal shifts. This allows it to remain in focus over a wide temperature range.
Q3: Why is temperature stability important in IR lenses?
IR lenses are often used in applications with significant temperature fluctuations. Temperature changes can cause expansion or contraction of lens materials, altering the focus. Athermalized lenses maintain clarity and focus automatically in these conditions.
Specification

HFOV
|
160x120
|
320x256
|
384x288
|
640x512
|
17μm
|
42.5
|
75.7
|
86
|
-
|
12μm
|
30.7
|
57.5
|
66.7
|
95.3
|
Optical Properties
Focal Length (mm)
|
3.5mm
|
F/#
|
1.0
|
Average Transmission
|
>85%
|
Back Focal Length
|
8.87mm
|
Environmental Durability
Operating Temperature
|
-40℃ to +60℃
|
Storage Temperature
|
-50℃ to +70℃
|
Protection Rating
|
IR67
|
First Surface Coating
|
AR
|
Mechanical Properties
Focusing Range
|
0.3m~∞
|
Back Working Distance
|
8mm
|
Detector Interface Size
|
M25 x 0.5-6g
|
Overall Dimensions (mm)
|
Φ35 x 33
|
Weight
|
50g
|
*For drawing, please contact us.