Factors to Consider When Choosing Telecentric Lenses

As we all know, telecentric lenses are a type of industrial lens specially designed for machine vision applications. Their selection does not follow fixed rules and mainly depends on whether they can meet the shooting needs.

Definition of Telecentric Lenses

Telecentric lenses are primarily designed to correct the parallax of traditional industrial lenses. They can ensure that the image magnification does not change within a certain object distance range, which is very important for applications where the measured object is not at the same object plane. Due to their unique parallel light path design, telecentric lenses have always been favored in machine vision applications where high lens distortion requirements are needed.

Factors to Consider When Choosing Telecentric Lenses

Focal Length and Field of View

According to the actual usage needs and the size and characteristics of the target, choose the appropriate focal length and field of view angle. Longer focal lengths can provide higher observation resolution and detail display, while larger field of view angles can cover a wider area. The focal length of telecentric lenses usually ranges from 17mm to 135mm. The choice of focal length mainly depends on what you intend to shoot. Landscape photographers may need a wider angle, while architectural photographers may need a focal length above 35mm.

Optical Quality

Select telecentric lenses with high-quality optical design and manufacturing processes to ensure the clarity and accuracy of the observation image. Optical quality includes aspects like lens material, coating technology, and the refractive index of lens components.

Aperture Size

The aperture size affects the lens's performance in low-light environments and the control of background depth. Generally speaking, an aperture of f/2.8 or smaller is more suitable for use in dark environments, while an aperture of f/4 or larger is more suitable for bright environments.

Design and Structure

Consider the design and structural features of the telecentric lens, such as focal length adjustment systems, focus adjustment systems, and lens coating functions. These aspects of design and structure will directly affect the ease of use and observation effects of telecentric lenses.

Budget and Actual Needs

When choosing a telecentric lens, you also need to weigh various factors based on your budget and actual observation needs. Some telecentric lenses may be more expensive but provide better observation effects; some economical products may also be a good choice in terms of performance and price. It is generally recommended to choose cost-effective products that meet your needs.

Brand and Service

Different brands may affect the performance and quality of lenses. Generally, choosing well-known brands with a good reputation for telecentric lens products can ensure product quality and after-sales service. Some brands may offer long-term warranty services or have more authorized repair centers.

In summary, considering the above factors, we can choose suitable telecentric lenses according to our needs, thereby providing strong support for various industrial and scientific research applications.