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40mm/240mm Double FOV Lens for MWIR Thermal Cameras

Code: 312-001

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Optical Parameters:

Focal Length(EFL) 40mm(WFOV)/ 240mm(NFOV) f Number (f#) 4.0
Wavelength Range 4.7μm~7.8μm Detector 320x256-30μm, Cooled
FOV 13.69°x10.97°/ 2.29°x1.83° Coating AR + DLC
Average Transmittance >76%  Working Temperature Range -40℃~60℃
Maximum Diameter 63mm Overall Optical Length 180mm
BFL 31.63mm(include cooled detector) Distortion <2.5% <1%

The Double FOV 40mm/240mm lens module is designed for cooled detector ( InSb FPA Focal Plane Arrays ) of 640x512-15μm of MWIR wavelength range 3.5~5.0μm, it is optimized optically for high transmission, good MTF and low distortion. The improvements and changes of the design is available for customer’s special request.

Curves:

1.MTF(WFOV@171p/mm)


2.MTF(NFOV@171p/mm)



3.Spot Diagram(WFOV)


4.Spot Diagram(NFOV)


5.Field Curve and Distortion(WFOV)


6.Field Curve and Distortion(NFOV)


7.Vignetting(WFOV)


8.Vignetting(NFOV)

40~240mm
M-DF-40/F4.0-240/F4.0DoubleFOV
4.0
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2~3 Days