Not
Your Standard CCTV Lens
There are a growing number of video imaging applications in which a single,
constant magnification and a fixed working distance are required. Navitar
has responded to this need with our new Precise Eye series of lenses.
Precise Eye lenses are designed to provide superior optical performance
and high vibration stability over standard C-mount video lenses. They are
optically precise and rugged to meet the demanding needs of fixed, high
magnification machine vision, metrology, biomedical, fiber optic, and electronic
imaging applications.
Precise Eye lenses incorporate Navitar’s precision engineering
and quality construction, resulting in images that are sharp, high resolution
and optically corrected for remarkable image quality.
Precision
Precise Eye lenses provide high resolution and low distortion. The resolution
capability (the ability to distinguish minute detail) exceeds that of
standard C-mount video lenses and most other competitive micro optics.
Precise Eye lenses from Navitar yield image resolution as high as 220
lp/mm.
Contrast
The lenses in the Precise Eye series not only resolve finer details, but
provide higher contrast levels (the difference between light and dark
features) over standard video optics. A lens that produces an image with
high contrast will increase the performance of an image processing system.
Transmission
Precise Eye lenses are supplied with a high quality, broad band, high
efficiency, anti-reflection coating that is optically corrected for the
spectral range of 400 nm – 1000 nm which allows each lens to image
light from NIR laser diode and NdYAG lasers.
Working Distance
Precise Eye lenses offer high magnification at long working distances
in order to provide the necessary space required for equipment, specimen
handling and lighting.
Flexible by Design
The Precise Eye series of lenses is designed on a modular basis. This
interchangeable design, combined with a wide selection of available attachments,
fixed or 3 mm fine focus, allows you to easily meet your exact needs.
Lighting
Fiber optic, LED, co-axial, ring light or other light sources can be selected
for specific applications.
Distortion
Precise Eye lenses can attain distortion of less than 0.14%.
Selecting the Correct Lens
Simply choose the block from the Magnification Matrix that most closely
approximates your requirements.
Precise Eye Versus Video Lenses
When selecting a lens for high precision applications, it is important
to differentiate between standard video lenses and Navitar’s Precise
Eye series. Video lenses were originally designed for very low magnification,
surveillance applications at working distances of greater than three feet
(approximately 1 meter). They were never intended for the high vibration
and high magnification environments of the factory floor. The usage of
extension tubes and close-up diopter lenses enable standard video lens
to work close-up, but this increases distortion and produces loss of resolution.
On the other hand, the Precise Eye series is designed to provide high
resolution, diffraction-limited performance for high magnification fixed
applications. The Navitar Precise Eye series covers magnification factors
between 0.30X and 0.22X. The working distance ranges from 13 mm up to
351 mm.
Precise and robust, they are used in machine vision applications requiring
a fixed field of view, high magnification and high quality image from
a long working distance. They provide a fixed aperture, fixed focus and
fixed working distance which ensures robust performance in your demanding
environment. Fine focus mechanisms are available on two models.
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High
resolution, diffraction-limited f/4.5 optical quality for high precision
measurement and inspection. 
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