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SWIR series
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Focal length
35 - 75 mm
Short wave

Key advantages

  • High resolution
    Designed for high resolution detectors up to 15 μm pixel pitch and 21 mm diameter.
  • Custom mount interface
    Can be provided upon request.
  • Large field of view and low distortion
    Superior optical performances.
Discover more
Main optical specifications Mechanical specifications
Part
number
Focal
length
Image
circle
diameter
Viewing
angle
Working
distance
range
ƒ/N Wavelength
range
Distortion Back
focal
length
Focusing Mount Outer
diameter
Length
diagonal
(mm) (mm) (deg) (mm) (nm) (%) (mm) (mm) (mm)
1 2 3
SW03520 35 21.0 33.4 350 - inf 2 900-1700 0.50 9.7 Manual C 71.0 45
Quote
SW05020 50 21.0 23.7 500 - inf 2 900-1700 0.41 9.5 Manual C 71.0 67.5
Quote
SW07520 75 21.0 15.9 750 - inf 2 900-1700 0.50 14.1 Manual C 71.0 97.8
Quote

Last update 31 Mar 2022

Expand table

Notes

  1. Working distance: distance between the front end of the mechanics and the object.
  2. Percent deviation of the real image compared to an ideal, undistorted image.
  3. Measured from the front end of the mechanics to the camera flange at infinite focusing.
  4. Given with no mount attached. See layout drawings.

Technical documents

Product user guide
IR focusing

Coating

Interface

Focusing

High Resolution

Specific quality testing system

Athermalization

Coating

Opto Engineering® MWIR and LWIR thermal lenses are HCAR coated. These thermal lenses are specifically designed to meet the needs of those applications with optical elements exposed to harsh environments, such as military vehicles and outdoor thermal cameras. This coating offers highly protective properties coupled with good anti-reflective performance, protecting the outer optical surfaces from high velocity airborne particles, seawater, engine fuel and oils, high humidity, improper handling, etc.. It offers great resistance to abrasion, salts, acids, alkalis, and oil.

Interface

All Opto Engineering® IR lenses can be equipped with any custom mount interface. Each infrared camera comes with a different detector format and a different mount interface. This is why Opto Engineering® has decided to provide any custom mount interface with any infrared lens at no additional cost so that these lenses can be integrated with any camera mount.

Focusing

Manual focusing mechanism, large field of view and low distortion.

High Resolution

Opto Engineering® infrared lenses are designed for high resolution detectors up to 15 μm pixel pitch and 21 mm diameter. Common infrared lenses are designed and optimized for Focal plane arrays (FPAs) with 30 μm pixel pitch. However, as a trend, pixels are constantly decreasing their size: Opto Engineering® IR lenses are compatible with the newest high resolution FPAs.

Specific quality testing system

Since no standardized and/or appropriate quality measurement system is available, Opto Engineering® designed and developed a specific optical test bench for Infrared (IR) optics. The system design is based on Opto Engineering® proprietary design optical benches used in the visible range.

Opto Engineering® developed reliable test procedures for checking IR optics quality and resolution (MTF: Modulation Transfer Function): each lens is checked by an experienced operator.

Athermalization

Opto Engineering® R&D team has proven expertise in designing challenging and demanding custom projects that successfully integrate optics and their mechanical housing.

Upon request, Our engineering® team can develop both active and passive athermalized systems, either optically or mechanically compensated, that work in environments characterised by significant temperature changes.