The FoldIR 28-850mm f/5.5 lens provides high resolution imaging in harsh environmental conditions, with long focal length and zoom ratio capabilities, as well as with high durability coatings to ensure continued performance and an extended product lifetime. Which makes the FoldIR 80-850mm f/5.5 MWIR lens ideal for constrained platforms, such as UAVs and drones, where compact designs and high optical performance over the entire zoom range are a must.
3 to 5 μm MWIR spectral range
Compatible with High Definition 1280 x1024 detector format with 15 μm pixel pitch
Folded design
Tight boresight retention
Extremely long operational range with over 24 km vehicle detection range
Additional drawings are not available for this product.
WFOV (28 mm)
Format
Pitch
640x512
1280x1024
15 µm
19.8°
39.8°
NFOV (850 mm)
Format
Pitch
640x512
1280x1024
15 µm
0.6°
1.3°
Specifications
Type
Continuous Zoom
Focal Length
28 to 850 mm
F/#
5.5
Cold Stop FPA Distance
28 mm
Cold Stop Clear Aperture
Ø5.09 mm
Back Focal Length
37.6 mm in air
Minimum Focus Range
3 m Wide, 50 m Narrow
Nuc (by defocus)
Yes
Focus Mechanism
Motorized
Focus Time
≤8 s
Zoom Mechanism
Motorized
Zoom Time
≤8 s
Weight
4.6 kg
Dimensions
256 mm x 176 x 257.5 mm (LxWxH)
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
Unsealed
HD Format
Yes
Wavelength Region
MWIR
Features
SupIR 28-850mm f/5.5 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)
Your Long Range Distance Needs Met
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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