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Zoom Lenses

Microscope Objectives
Projection Lenses
Fisheye Lenses
Telecentric Lenses
SWIR Imaging Lenses
IR Lenses
Zoom Lenses
Beam Expanders
Collimating Lenses
F-Theta Lenses
Opto-Mechanical Modules
Wide Angle Lenses
MegaPixel Lenses
Fixed Focal Length Lenses

Optical Characteristics

  • High Resolution and Low Distortion
  • Day/Night Options
  • C- and CS-Mount Versions
  • Focal Length from 2.8mm – 90mm

Both varifocal and zoom lenses are built with movable elements for adjusting the focal length. These lenses provide a flexible solution to applications that previously would have required multiple fixed focal length lenses for getting the desired field of view at a specific working distance. A lens might be specified as 2.8 -12mm or 5 – 50mm, meaning the focal length can be adjusted within these ranges. These lenses are used for many applications including inspection, machine vision, robotics, etc.

Using varifocal and zoom lenses, users can select the effective focal length within the specified range (for example 6 – 60mm). A varifocal lens will need to be refocused whenever the focal length is adjusted; the zoom lens will stay in focus when the focal length is adjusted. The varifocal is an economical and compact lens that is more cost-efficient to produce than a zoom lens.

Shanghai Optics Inc. offers a wide range of zoom and varifocal lenses. These lenses may be offered with manual or motor-controlled zoom versions. Motorized Zoom/Focusing Lens (with electromotor and controller) can be integrated into exiting systems with specific motors selected by customers that will enable basic operations of zoom, focus and iris

Lens Layout:

MTF Chart:

Digital Projection Zoom Lens:

Focal Length 19.3-22.6mm
Maximum aperture F/1.7(wide)-2.2(tele)
Imager format 0.63″ LCD 1280X768
Zoom ratio 1.2
Field angle 56°
Imager circle 21.5mm
Distortion 1.50%
Relative illumination 80%
Projection range 1~infinity
Lateral color <0.7 pixel

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