Zoom lens MWIR F '= 18-275mm F#/ 5.5
Parameter Value
Spectral range, μm 3,4 - 4,8
Main wavelength (λ0), μm 4,2
Minimum focal length at λ0, mm 18,0
Maximum focal length at λ0, mm 275,0
Aperture ratio 1:5.5
Back focal length, mm 28,6
Image plane Fixed throughout focal range
Optical system length, mm 110,0
Minimum field of view, 2ω, deg 2,9
Maximum field of view, 2ω, deg 39,0
Linear field in image space, 2y ', mm 12,3
Maximum distortion,% -6,20
The minimum distance to the object, m 1 m (f '= 18 mm)
30 m (f '= 275 mm)
Operating temperature range, degrees Celsius -30+55

    18

MTF for a focal length of 18 mm

    144

MTF for a focal length of 144 mm

    275

MTF for a focal length of 275 mm