Zoom Lenses for Precision Imaging

Both varifocal and zoom lenses are equipped with movable elements that allow for the adjustment of focal length. These types of lenses offer a versatile solution for applications that previously required the use of multiple fixed focal length lenses to achieve the desired field of view at a specific working distance. For instance, a lens may be specified with a range like 2.8–12mm or 5–50mm, indicating that the focal length can be varied within these specified intervals. Varifocal and optical zoom lenses are used  in various fields, including inspection, machine vision, robotics, and more.

Zoom Lenses, zoom lens, optical zoom lenses, custom zoom lenses
Zoom Lens
Zoom Lenses, zoom lens, optical zoom lenses, custom zoom lenses
Zoom Lens

With varifocal and optical zoom lenses, users have the flexibility to choose an effective focal length within the given range, such as 6–60mm. When using a varifocal lens, it’s important to note that refocusing is necessary whenever the focal length is adjusted. In contrast, a zoom lens maintains focus even while adjusting the focal length. The varifocal lens is an economical and compact option, which makes it a cost-effective choice compared to a zoom lens.

Applications for Zoom Lenses in Precision Imaging

  • Inspection systems
  • Machine Vision
  • Robotics
  • Medical Imaging
  • Surveillance and Security

Durability & Lifespan of Zoom Lenses for Industrial Applications

  • Material Construction:
    Industrial-grade zoom lenses are often constructed with robust materials such as anodized aluminum housings and tempered glass, which enhance durability in demanding environments. These materials resist corrosion, wear, and tear, making the lenses suitable for long-term use in harsh conditions, such as factories, outdoor installations, or high-vibration settings.
  • Sealed Designs:
    Many precision zoom lenses feature sealed designs to protect internal optics from dust, moisture, and contaminants. This is essential in environments like food processing, chemical manufacturing, or outdoor machine vision systems, where exposure to the elements could otherwise degrade optical performance over time.
  • Shock and Vibration Resistance:
    Industrial zoom lenses are often designed to withstand mechanical shocks and vibrations that occur in heavy machinery or mobile robotic systems. These lenses maintain their alignment and focus even after prolonged exposure to such conditions, ensuring long-lasting precision in dynamic applications.
  • Thermal Stability:
    Lenses used in industries such as automotive or aerospace may encounter wide temperature fluctuations. Durable zoom lenses are engineered to retain their optical performance despite these changes, using special materials or thermal compensation technologies to prevent expansion or contraction that could affect image quality.
  • Long Operating Life:
    High-quality zoom lenses are built for continuous operation with minimal maintenance, making them ideal for industries where downtime is costly. Anti-scratch coatings on lens surfaces, high-quality moving parts, and long-lasting lubricants ensure smooth zooming actions over years of use.
Zoom lens
Lens Layout
Zoom Lenses
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Zoom Lenses
MTF Chart 2
Zoom Lenses
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Factory Standard

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

Digital Projection Zoom Lens Example

Focal length

56mm-560mm

F/#

F5-F30

Imaging size

8mm

Zoom Ratio

10

Field Angle

8°-0.8°

Distortion

1%

Relative illumination

>98%

Projection range

Infinity

Lateral color

<0.2 Pixel

Custom Zoom Lenses

Avantier Inc. offers a diverse range of both custom zoom and varifocal lenses, with options for manual or motor-controlled zoom versions. For those seeking motorized zoom and focusing capabilities, Avantier provides lenses equipped with electromotors and controllers that can seamlessly integrate into existing systems. Customers can select specific motors tailored to their requirements, enabling basic operations like zoom, focus, and iris adjustments.

Contact Avantier if you’d like to schedule a free consultation or request for a quote for your next project.

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