In the field of precision manufacturing and inspection, quadratic image measurement technology has become an indispensable part of many industries due to its high efficiency, non-contact and high accuracy. Telecentric lenses, as the core component of the secondary measurement system, are critical to ensuring the accuracy and stability of the measurement results.

Fundamentals and advantages of telecentric lenses

Telecentric lens is a specially designed optical lens whose optical axis maintains a constant angle with the plane of the object, so that no matter how far the object is from the lens, the main light ray on the imaging surface is always parallel to the optical axis. This feature effectively eliminates changes in image magnification caused by changes in the height of the object, ensuring the consistency and accuracy of the measurement. Telecentric lenses are mainly divided into object-side telecentric lenses and image-side telecentric lenses, as well as bilateral telecentric lenses that combine the advantages of both, and are widely used in high-precision measurement scenarios such as flat size measurement and positional degree detection.

Type Consideration

1, measurement accuracy requirements: according to the precision requirements of the measured workpiece to choose the appropriate telecentric lens. High-precision measurement requires the use of high-resolution, small distortion lens.

2, working distance and field of view range: working distance refers to the distance from the front of the lens to the object being measured, according to the actual application scene to determine. Field of view determines the size of the area covered by a single measurement, should be based on the size of the object to be measured reasonable choice.

3, magnification and focal length: magnification determines the degree of magnification of the image, directly affecting the measurement accuracy. Focal length and magnification are closely related, choose the right focal length can optimize the image quality.

4, light source and lighting conditions: good lighting is to ensure the accuracy of the measurement of the key. According to the material, color and reflection characteristics of the object being measured, select the appropriate type of light source and lighting method, and consider the adaptability of the lens to the light.

5, the lens interface type and camera compatibility: to ensure that the selected telecentric lens is compatible with the camera in the measurement system, pay attention to the lens interface type (such as C-port, F-port, etc.) and the camera match.

Configuration Recommendations

1. Comprehensive consideration of system performance: When selecting a telecentric lens, we should not only focus on the performance of individual lenses, but also consider the comprehensive performance of the entire measurement system, including the camera resolution, image processing software capabilities, etc.

2. Customized solutions: For specific measurement needs, POMEAS provides customized telecentric lens solutions, including special focal lengths, large field of view, low distortion and other designs to meet customers' unique needs.

3. Training and technical support: When choosing a supplier, consider whether it can provide comprehensive technical training, on-site installation and commissioning, and follow-up technical support services to ensure the efficient operation and maintenance of the measurement system.