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| The
Achrovid Series of objectives for te Infinity InFocus™
Model KC Video Microscope. |
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Although video
inspection microscopes play an essential role in high magnification
process monitoring and machine vision, they have invariably been
equipped with objectives primarily designed for visual purposes. In
video terms, such objectives have stated numerical aperture (N.A.)
ratings that are more theoretical than practical. This is
because "visually-dedicated" objectives "presume"
that an end-user will constantly monitor each image to obtain a proper
balance between contrast and resolution—through either an adjustment
of condensing optics, a variation in aperture—or both.
Unfortunately, it is impractical to monitor each image and adjust this
balance on an individual basis in automated video applications or
where many objects are being constantly examined. Moreover, the
cross-over point between resolution and contrast occurs at less than
full aperture (full N.A.). The
Achrovid Series
of objectives —which consists of six objectives ranging from
2x, 2.5x, 3.3x, 4x, 5x to l0x—were developed to overcome these
limitations. To do so, the Achrovid objectives were designed upon
criteria originally developed by E.M. Nelson. This assures the best
possible maximization of contrast and resolution for video
applications. As a result, Infinity-Photo-Optical Company has
developed the first range of specifically "video-dedicated"
microscope objectives. Even though their stated N.A. ratings are
somewhat lower than traditional "visually-dedicated"
objectives, the Achrovids achieve what is considered to be a more
usable and pleasing image without complication or any need to
individually monitor each successive image for best results. |
| -
at a glance -
Achrovid™ Video
Microscope Objectives |
| Close
working distance |
Working
distance is can be as close as 12.5mm (0.49 In.) |
Six
video-dedicated
objectives available |
Six
objectives ranging from 2x, 2.5x, 3.3x, 4x, 5x to l0x |
Compatible
with the Infinity
Model KC Video Microscope |
The
objectives are mounted via the common "M"-thread
(26mm/Whitworth) and are therefore compatible with all
"M"-thread instruments, such as the Infinity
Model KC Video Microscope, by means of an M26 to M27
Adapter. |
|
All Achrovid
objectives are mounted via the common "M"-thread
(26mm/Whitworth) and are therefore compatible with all
"M"-thread instruments. They were specifically designed for
all Infinity products that accept external microscope objectives (InfiniTube™,
InfiniTube-EX™, Model KC™ and InFocus™) by means of an M26 to
M27 Adapter. All have 37mm working distances—except the l0x which
has a working distance of 12.5mm. A forthcoming Parfocal Adjuster Tube
will allow the l0x Achrovid to equalize itself for parfocality when
used with other Achrovids on a revolving turret nosepiece. |
