Athermalized LWIR Lens 2.1mm F/1.3 Description
Athermalized LWIR Lens 2.1mm F/1.3 is expertly crafted for high-performance long-wave infrared (LWIR) imaging applications. Featuring a compact 2.1mm focal length and a wide F/1.3 aperture, this lens delivers exceptional light transmission and enhanced sensitivity, ensuring clear and detailed thermal images even in low-light conditions. Its athermalized design effectively compensates for temperature-induced optical variations, maintaining consistent focus and image quality across a broad range of environmental temperatures without the need for frequent adjustments. Ideal for use in compact thermal imaging cameras, advanced surveillance systems, industrial inspection tools, and environmental monitoring equipment, this LWIR lens provides reliable and stable performance. It significantly enhances the accuracy and efficiency of thermal detection and analysis, making it a valuable component for both commercial and military applications.
Athermalized LWIR Lens 2.1mm F/1.3 Specifications

HFOV
|
160x120
|
256x192
|
320x256
|
384x288
|
17μm
|
65.9
|
-
|
-
|
-
|
12μm
|
49.1
|
72.4
|
-
|
-
|
Optical Properties
Focal Length (mm)
|
2.1mm
|
F/#
|
1.3
|
Average Transmission
|
>92%
|
Back Focal Length
|
4.25mm
|
Environmental Durability
Operating Temperature
|
-40℃ to +80℃
|
Storage Temperature
|
-50℃ to +80℃
|
Protection Rating
|
IR67
|
First Surface Coating
|
AR
|
Mechanical Properties
Focusing Range
|
0.3m~∞
|
Back Working Distance
|
4.2mm
|
Detector Interface Size
|
M17 x 0.5-6g
|
Overall Dimensions (mm)
|
Φ23.3 x 13.5
|
Weight
|
8g
|
*For drawing, please contact us.
Athermalized LWIR Lens 2.1mm F/1.3 Application
· Thermal Imaging Cameras: Enhances the detection of heat signatures for both commercial and military applications, delivering clear and precise images across a range of lighting conditions.
· Surveillance Systems: Strengthens security monitoring by providing reliable infrared imaging in various environmental temperatures, eliminating the need for frequent recalibration.
· Industrial Inspection: Enables non-destructive testing and continuous monitoring of machinery, electrical systems, and infrastructure by identifying thermal irregularities to prevent equipment failures.
· Environmental Monitoring: Facilitates the observation of natural phenomena, such as wildlife behavior and habitat changes, through consistent thermal imaging despite fluctuations in temperature.
Athermalized LWIR Lens 2.1mm F/1.3 Packing
Our Athermalized LWIR Lens 2.1mm F/1.3 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
|
256x192
|
320x256
|
384x288
|
17μm
|
65.9
|
-
|
-
|
-
|
12μm
|
49.1
|
72.4
|
-
|
-
|
Optical Properties
Focal Length (mm)
|
2.1mm
|
F/#
|
1.3
|
Average Transmission
|
>92%
|
Back Focal Length
|
4.25mm
|
Environmental Durability
Operating Temperature
|
-40℃ to +80℃
|
Storage Temperature
|
-50℃ to +80℃
|
Protection Rating
|
IR67
|
First Surface Coating
|
AR
|
Mechanical Properties
Focusing Range
|
0.3m~∞
|
Back Working Distance
|
4.2mm
|
Detector Interface Size
|
M17 x 0.5-6g
|
Overall Dimensions (mm)
|
Φ23.3 x 13.5
|
Weight
|
8g
|
*For drawing, please contact us.