Germanium Objective Lenses

Focal length	18 mm	50 mm	100 mm
Operating spectral length	8-14 mcm	8-14 mcm	8-14 mcm
Relative aperture	1:0.8	1:0.7	1:0.7
Field of view	50o	18o	9o
Transmission ( =10.6mcm)	0.80	0.86	0.85
Relative aperture with diaphragm	-	to 1:8	to 1:8
Focusing range	-	from 1.5 m	from 5 m to
Overall dimension    (diameter and length)	67x42mm	107x70mm	173x138mm

• Wide field of view
• Large depth of focus allows to work without refocusing at any distance to object ranging from 0.5 m.

F=50 and 100 mm:

• Iris diaphragm and refocusing mechanism;
• Thermal compensation in the range between - 40 and +60o C.
• Objectives are developed and manufactured on demand. Aspherical lenses can be used