Optical Parameters:
| Focal Length(EFL) | 27mm | f Number (f#) | 2.0 |
| Wavelength Range | 3.7~4.8 micro | Detector | 640x512-15micro |
| FOV | 20.16°x16.19°(25.65°) | Coating | DLC+AR |
| Average Transmittance | >81% | Working Temperature Range | -40℃ ~ +50℃ (Need not to refocus) |
| Maximum Diameter | 32mm | Overall Optical Length | 74.57mm |
| BFL | 32.72mm (8.09mm in air, 24.63mm in detector) | Distortion | <4% |
27mm F2.0 athermaiized lens module is designed for cooled detector ( InSb FPA Focal Plane Arrays) of 640x512-15μm at MWIR wavelength range 3.7~4.8μm, it is optical passively athermalized, and is optimized optically for good MTF and low distortion at temperature range of -40℃ to +50℃. Please see the following data sheet and curves to get more information about this lens module. The improvements and changes of the design is available for customer’s special request.
Curves:
1.MTF@33lp/mm
2.Spot Diagram
3.Relative Illumination
4.Vignetting
