Snap-On Focusers Snap-On Focusers, like Snap-On Collimators, are designed to "snap" onto an FC connectorized fiber, and to focus at a fixed distance. Two OFR LLO-Series Aspheric Coupling Lenses focus the output to a predictable Airy's Disc.
Wavelength
Range (-5, -8, -11)
Order as
450 - 600 nm
VIS
550 - 750 nm
VIR
750 - 960 nm
NIR
960 - 1100 nm
YAG
1275 - 1350 nm
IR1
1480 - 1600 nm
IR2
Snap-On Focusers For Single-Mode Fiber
Catalog
Number
Working
Distance
Focal
Spot*
Body
Diameter
Body
Length
FFC-5/5-λ
2.3 mm
17 µm*
9.5 mm
22 - 24 mm
FFC-5/8-λ
5.5 mm
28 µm*
9.5 mm
22 - 24 mm
FFC-8/5-λ
2.3 mm
11µm*
9.5 mm
22 - 24 mm
HCF-N
Snap-On holder, tapped for post mount or load into standard 1" holder
Pigtailed Focusers
Pigtailed Focusers terminate a 1-meter single-mode or multimode fiber pigtail. Like Snap-On Focusers, Pigtailed Focusers focus at a fixed distance.
Two OFR LLO-Series Aspheric Coupling Lenses (one collimator, the other focuser) focus the output to a predictable Airy's Disc (see Coupling Lenses page FO-16). Each micro double-aspheric lens is multilayer anti-refraction coated, with >98% transmission at the peak wavelength.
