Optical Parameters:
| Focal Length(EFL) | 400mm | f Number (f#) | 2.0 |
| Wavelength Range | 3.5μm~5μm | Detector | 640x512-15micro, cooled |
| FOV | 1.38°x1.1°(1.76°) | Coating | AR or DLC |
| Average Transmittance | >81% for DLC external coating >86% for AR external coating |
Working Temperature Range | -40℃~60℃ |
| Minimum Working Distance | 40mm | Distortion | Maximum D-FOV Distortion:<3.5% |
| BEL | 48.55mm |
Mechanical Parameters:
| Dimensions | Length:290.88mm Diameter:225mm | Focus Mechanism | Internal Manual Focusing |
| Sealing | IP54 | Mount | M80x1-6g Back Flange Distance: 52.245 |
| Housing Material | Aluminum, Black anodized | Operation Temperature | -40℃~ +60℃ |
| Storage Temperature | -50℃~ +70℃ | Weight | ~5000gram |
400mm f/2.0 manual focus lens module is compliant with cooled FPA detectors ( InSb Focal Plane Arrays ) of 640x512-15μm, operating at the MWIR wavelength range 3.5~5.0μm. The lens module is optimized for high transmission, superior MTF and low distortion. The sealing grade of the housing is IP54, with a total weight of less than 5000 grams. Modifications of the parameters could be arranged upon your request.
Drawing:
Testing Results and Curves:
1. MTF@33lp/mm
2. Field Curvature and Distortion
3. Relative Illumination
4.Vignetting
