Selection of Industrial Camera Lens

In modern machine vision systems, industrial camera lenses play a crucial role. Choosing the right industrial camera lens not only affects image quality but also directly influences measurement accuracy and system efficiency. This article will discuss the key factors of industrial camera lenses to help you make an informed decision when choosing them.

Choosing the Interface for Industrial Camera Lenses

Industrial camera lenses' interface sizes usually adhere to international standards, including F mount, C mount, and CS mount interfaces. Among them, F mount is suitable for lenses with focal lengths greater than25mm, while C mount and CS mount interfaces are suited for lenses with focal lengths less than25mm. The main difference between C mount and CS mount lies in the distance from the lens mount to the sensor: C mount is17.526mm, while CS mount is12.5mm. Ensuring interface compatibility for different types of lenses and cameras is crucial to guarantee optimal imaging results.

When selecting an industrial camera lens, understanding these interface compatibilities can help you avoid unnecessary troubles. For example, C mount lenses can be directly used with C mount cameras, whereas a5mm adapter ring is needed when used with CS mount cameras. Meanwhile, CS mount lenses are not compatible with C mount cameras, so it's essential to pay attention to these details when purchasing.

The Importance of Industrial Camera Lens Parameters

When selecting an industrial camera lens, multiple fundamental parameters must be considered, such as focal length, object height, image height, magnification, and the distance from the image to the object. These parameters affect each other. For instance, the larger the aperture, the higher the image brightness, but the shallower the depth of field, which affects measurement accuracy. By configuring these parameters correctly, you can optimize image quality and ensure it meets specific application needs.

Wavelength also significantly impacts image quality. Using a short-wavelength light source can enhance image resolution under the same industrial camera and lens parameters. Therefore, for applications requiring precise dimensional measurements, choosing an appropriate light source is crucial for improving system accuracy.

Industrial Camera Lenses: The Advantages of Telecentric Lenses

Telecentric lenses are a specially designed type of industrial camera lens, primarily used to correct the parallax error of traditional lenses. They can maintain a constant magnification within a certain object distance range, which is particularly important for applications where objects being measured are not on the same plane. Compared to ordinary lenses, telecentric lenses have characteristics such as low distortion, high depth of field, and high resolution.

Low Distortion

In precise measurement, excellent telecentric lenses can achieve very low distortion, making image reproduction more accurate. This is especially crucial in minimizing tiny distortions.

High Depth of Field and High Resolution

A very shallow depth of field can lead to decreased image contrast and thus lower resolution. Telecentric lenses can maintain high resolution within the depth of field range, making them suitable for various testing requirements.

Wide Application

Telecentric lenses are widely used in fields such as semiconductors, mechanical parts, and laser diameter measurement, performing exceptionally well in high-precision measurement and positioning tasks.

Key Points for Choosing an Industrial Camera Lens

When choosing a suitable industrial camera lens, consider the following key points:

Field of View and Optical Magnification

Choose a lens that has a slightly larger field of view than the object being measured to facilitate motion control.

Depth of Field Requirements

For projects that require a certain depth of field, use a small aperture and select low magnification lenses to increase depth of field whenever possible.

Chip Size and Camera Interface

Ensure the lens supports the corresponding industrial camera chip size to avoid unnecessary installation issues.

Light Source Compatibility

Choose appropriate lenses to perfectly match the light source and enhance imaging quality.

Consideration of Installation Space

Among the available options, ensure the lens size can adapt to the installation space of existing equipment.