How to choose the right industrial lens in precision inspection?

In today's development of automated inspection and intelligent manufacturing, industrial lenses, as an important part of machine vision systems, play an important role in precision inspection. Choosing the right industrial camera and lens can make your production more efficient, not only improving the quality of image acquisition, but also greatly improving the accuracy and efficiency of inspection. So, in precision inspection applications, how should companies choose the most suitable industrial lens?

1. Clarify inspection requirements and determine lens type

Before choosing an industrial lens, you must first clarify the specific needs of the inspection object. For example, is it two-dimensional surface defect detection or three-dimensional structural dimension measurement? Is it the precise identification of smiling components or a wide range of barcode reading? According to different application scenarios, choose different types of lenses:

Fixed focus lens: suitable for scenes with fixed installation distance and consistent inspection position;

Telecentric lens: suitable for dimensional measurement tasks with extremely high precision requirements, which can effectively eliminate parallax and distortion;

Zoom lens: suitable for general inspection of products that require flexible adjustment of the field of view or multiple specifications;

Line scan lens: used with linear array cameras for high-resolution, large-format continuous inspection tasks.

2. Pay attention to lens parameters to ensure detection accuracy

In production, industrial cameras and lenses are used to more accurately capture product defects and improve production quality. So how to choose a suitable industrial lens? The key parameters that affect the performance of industrial lenses include focal length, light source, resolution, distortion rate, depth of field, etc. In precision detection, these parameters need to be reasonably matched according to the actual application:

The focal length determines the field of view, and is selected in combination with the working distance and the size of the detection area;

The aperture size affects the near beam and depth of field, and a balance needs to be struck between brightness and image clarity;

The resolution matching needs to be coordinated with the camera pixel size to ensure a clear image;

The lower the distortion rate, the better, especially in high-precision measurement scenarios, low-distortion lenses must be used;

The depth of field determines the ability to adapt to changes in the height of objects, mainly for targets with three-dimensional structures or height differences.

3. Match the appropriate light source and camera to build a stable system

Industrial lenses are not used alone. They need to work with industrial cameras and light sources that match the interface to build a stable imaging system. The resolution of the lens and the pixel size of the camera should be reasonably matched to avoid blurred imaging or waste of resources. At the same time, selecting the appropriate light source angle and wavelength according to the target surface material and color can further optimize the image contrast and edge clarity.

4. On-site testing and debugging to ensure the actual effect

Even if the parameters are reasonably matched, there are still differences in the actual performance of lenses from different manufacturers. Before formal selection, it is recommended to conduct a comparison test of multiple lenses in the actual detection environment, and comprehensively evaluate from multiple dimensions such as image clarity, imaging stability, and edge restoration ability to select the most suitable one.

In precision detection, the selection of industrial lenses is a task that emphasizes both technology and experience. Shenzhen Zhixiang Vision has long focused on the field of machine vision and provides various high-performance industrial cameras, industrial lenses and visual system solutions. We can provide customers with professional selection guidance and system integration support to help various industrial detection tasks achieve higher quality and higher efficiency.

If you have related product needs, please contact us for more detailed product information and technical support!