Folded-Optics Continuous Zoom Lens for advanced unmanned aerial systems IR cameras
Introducing the FoldIR 30-450mm f/3.4 continuous zoom lens with Ophir's innovative folded optical design, offering lightweight, compact design while maintaining long optical lengths and improved tolerance sensitivity. This design ensures exceptional performance even in challenging environments, addressing stabilization and athermalization issues. Its unique f/3.4 aperture guarantees superior image quality, surpassing larger aperture zoom lenses in diffraction limit MTF and IR signal collection. The lens features a built-in mechanical shutter for NUC control, enhancing image quality through Ophir's control system. Weighting 2kg, offering an impressive detection range of over 20km, and a horizontal field-of-view of 26.9º (WFOV) and 1.7º (NFOV). This compact, lightweight, long-range, high-performance lens is the ultimate selection of for optical air-land-sea optical gimbals and payloads.
Key features
Efficient folded optics design for min. volume use
Additional CAD file downloads are not available for this product.
foldir-30-450mm-f-3-4 - Drawings
Additional drawings are not available for this product.
WFOV (10mm)
Format
Pitch
640x480
1280x1024
15 µm
19.3º
10 µm
12.5º
26.9º
NFOV (450)
Format
Pitch
640x480
1280x1024
15 µm
1.3º
10 µm
0.8º
1.7º
Specifications
Type
Continuous Zoom
Focal Length
30-450mm
F/#
3.4
Avg.Trns.
(3.4-4.9μm) 80% (HC)
Cold Stop FPA Distance
19.4mm
Cold Stop Clear Aperture
Ø5.7mm
Minimum Focus Range
20m
Nuc (by defocus)
Yes
Focus Mechanism
Motorized
Focus Time
<1sec
Zoom Mechanism
Designated lens controller
Zoom Time
<5sec
Weight
2kg
Dimensions
Ø146 x 247mm
Drive Voltage
12V
Current Consumption
<0.5A average, 1.0A peak
Communication Interface
RS422, RS232
Operating Temperature Range
20ºC to +55ºC
Storage Temperature Range
-40ºC to +70ºC
Sealing
IP67 front element only
Wavelength Region
MWIR
Features
FoldIR 30-450mm f/3.4 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)
Introducing the FoldIR 30-450mm f/3.4: high performance, long-range, ideal for small size gimbals
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