The FoldIR 50-1350mm f/5.5 continuous zoom lens is based on a unique folded-optic design with the longest focal length of 1350mm and a 27x motorized zoom ratio, suited for VGA and HD IR sensors. The lens is optimized for stabilized payloads with capabilities for highresolution vision and identification in harsh environmental conditions and on constrained platforms while maintaining focus and tight line of sight (LOS) retention through the entire zoom range. Such features open up new commercial and defense applications, such as visualizing objects and situations that may not be visible to the human eye, for small size UAVs, threats at airports and state borders, gas leaks, and more.
Longest focal length and zoom ratio
Designed for UAV payloads
Detection range >25km
Unique folded optic design
Compatible with 1280x1024 SXGA format 15 μm pixel pitch cameras
Additional drawings are not available for this product.
WFOV (50 mm)
Format
Pitch
640x512
1280x1024
15 µm
10.8°
20.5°
NFOV(1350mm)
Format
Pitch
640x512
1280x1024
15 µm
0.4°
0.8°
Specifications
Type
Continuous Zoom
Focal Length
50-1350 mm
F/#
5.5
Coating Type
Low Reflection Hard Carbon
Spectral Range
3.4-5.0 μm
Avg.Trns.
70%
Cold Stop FPA Distance
28 mm
Cold Stop Clear Aperture
Ø5.09 mm
Back Focal Length
37.6 mm in air
Minimum Focus Range
5 m Wide, 200 m Narrow
Nuc (by defocus)
Yes
Focus Mechanism
Motorized
Focus Time
≤8 s
Zoom Mechanism
Motorized
Zoom Time
≤8 s
Weight
15.6 kg
Dimensions
Length 376.4mm; Ø281mm; height 293mm
Drive Voltage
28 VDC
Current Consumption
1.25 A average, 2.5 A peak
Communication Interface
RS422
Operating Temperature Range
-20°C to +65°C
Storage Temperature Range
-54°C to +71°C
Sealing
IP 67 front element only
HD Format
Yes
Wavelength Region
MWIR
Features
SupIR 50-1350mm f/5.5 f/4.0 Detection, Recognition & Identification (DRI) Range
DRI ranges enable one to easily estimate the maximum range that an object can be either detected, recognized or identified. It is important to note that these estimates are based solely on geometrical parameters – the target size, distance, lens focal length and camera detector pixel size. Signal level, detector sensitivity, atmospheric conditions and other factors are not considered!
The calculations used here are based on the “Johnson Criteria”. According to the Johnson Criteria, the minimum resolution, pixels on target, required to achieve a 50% probability for an observer to discriminate an object are:
Detection: An object is present – 2 pixels on target (Lower Bar)
Recognition: discern the type of object, a human vs. a vehicle – 8 pixels on target (Middle Bar)
Identification: discern specific objects, a man vs. a woman, a car model – 12.8 pixels on target (Upper Bar)
Live demo: FoldIR 50-1350mm f/5.5 MWIR Suited for small pixels VGA and HD IR cameras
High Performance Mid-Wave Focal Plane
Using advanced technologies, top-quality materials and unique coating techniques, together with innovative engineering and opto-mechanical designs, we have earned a reputation for excellent performance, durability and quality.
Our highly abrasion-resistant, anti-reflective advanced optical coatings include several types of Hard Carbon coatings which provide maximum durability, energy transmission & minimal reflection. Our innovative coating technologies include:
Physical Vapor Deposition (PVD) – Thermal heating and electron gun
Ion Assisted Deposition (IAD) – Ion gun
Plasma Enhanced Chemical Vapor Deposition (PECVD) for DLC coatings
Passive Athermalized Lens Assembly
Our IR imaging lens assemblies incorporate passive athermalization of the lenses and opto-mechanical system to maintain the highest imaging performance over the full operating temperature range. We use advanced materials that enable unique athermalization properties and optomechanical designs that effectively compensate for optical variations over a wide temperature range.
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