InnPho's Mid-IR Focusing Objectivesare designed for maximum efficiency in coupling the output from a mid-IR source into single-mode or multimode IR transmitting fibers.

Feature:
● ZnSe MicroLens
● AR-AR in Mid-IR
● Diffraction limited
● Easy alignment using HeNe
● Mounting RMS thread
● 2 μm to 12 μm

 

Number	Clear Aperture	Numerical Aperture	Working Distance	Focal Length
LFO-5-6	5 mm	0.25	5.3 mm	6 mm
LFO-5-12	5 mm	0.13	11.5 mm	12 mm
LFO-5-18	5 mm	0.08	17.5 mm	18 mm
HTP-RMS	Tilt Plate Positioner with RMS thread
When ordering, specify wavelength, for example, LFO-5-6-4.75.

Focal Spot Diameter (μm)

	Focal Length (mm)
Beam Dia (mm)	6 12 18	6 12 18	6 12 18
2.0 mm	15 30 46	23 46 69	30 61 91
3.0 mm	14 20 30	15 30 46	20 41 61
4.0 mm	32 15 23	32 23 34	32 30 46
	λ = 4 μm	λ = 6 μm	λ = 8 μm

TRANSMISSION
The ZnSe lens in LFO-Series Objectives is Broadband AR (BBAR) coated on both sides. Transmission from 2 μm to 12 μm is 90% to 96%. Request copy of transmission graph.