Features
The OP1021 combines a versatile Nearfiled Scanner with a Farfield
Scanner into a single instrument.
The Nearfiled (NF) describes the optical power density on the
surface of a radiating source or the end of a fiber. The near field
measurement can determine the refractive index profile of multimode
fibers and the fiber's mode filling.
With the included application OPL_LCA the Encircled Flux measurement
is calculated and analyzed against the appropriate IEC template.

The Farfield (FF) measurement is the optical power density of a source
or fiber end on a surface measured at a radial distance. The farfield
measurement can determine the numerical aperture of sources and fibers.