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Zoom 6000 High Mag Zoom Lenses
Polarizers
Polarization is a contrast enhance-
ment technique that can reduce
back reflections and bring out
salient features not readily visible
with normal viewing.
If you choose to add a polariza-
tion option to your lens system, it
requires an illumination polarizer
(2-62827), an analyzer above the
zoom, a quarter wave plate (op-
tional), and a shorter version of an
Adapter (RA) because the analyzer
shortens the optical path by
50.8 mm.
Analyzer
When used in conjunction with a
polarized light source, an analyzer
(1-60816) allows for cross polar-
ization of the light in the imaging
system. This reduces reflections
that can deteriorate the image
quality. The analyzer must be used
in conjunction with the right angle
adapters.
Aperture Control
Lens systems can be designed with
an internal iris that can be manipu-
lated without cutting into the field
of view. The iris permits the reduc-
tion of image intensity at the image
plane, which reduces “blooming”
and other damaging artifacts. The
iris can also be closed down to
essentially “stop down” the lens
to reduce the Numerical Aperture
of the lens. This narrowing of the
light gathering cone produces a
significant increase in the depth of
field (the thickness of the envelope
at the object, where various object
heights are still in reasonable
focus).
To have an aperture control feature
designed into your system place an
“A” after the standard part
number.
Quarter Wave Plate
A quarter wave plate (1-60981) has
the unique feature of taking the
polarized light and circularly polar-
izing the beam (sort of a spiraling
effect). When this beam reflects
off a specular object, the spiraling
reverses, and upon re-striking the
quarter wave plate, the beam is ex-
tinguished. This technique is useful
in eliminating reflections from
wafers and circuit boards. At other
times, the quarter wave plate is
used to add contrasting coloration
to appropriate objects. For use with
Zoom 6000 Coaxial lens.
Infinity Corrected
Objectives
Infinity Corrected Objectives can
be attached to the Zoom 6000
UltraZoom to increase the sys-
tem magnification and decrease
working distance. Navitar offers
Mitutoyo long working distance
objective lenses in magnifications
of 5X, 10X, 20X, 50X (1-60226,
1-60227, 1-60228 and 1-60229)
and Motic long working distance
objective lenses in magnifications
of 5X, 10X and 20X (1-62828,
1-62829, 1-62830).
Accessories
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