In the field of modern industrial inspection and precision measurement, the accuracy of optical imaging is the core prerequisite for ensuring the reliability of measurement results. Traditional lenses have long been unable to overcome the limitations of high-precision measurement due to issues such as perspective distortion and fluctuations in magnification caused by changes in object distance. With their unique optical design, double telecentric lenses solve these problems at their root, becoming the “irreplaceable cornerstone of precision” in high-end measurement systems. The POMEAS LTDC series of high-precision double telecentric lenses take this advantage to the extreme with their outstanding performance, redefining the upper limit of measurement system precision.

In a complete measurement system, the performance of the lens directly determines whether the system can accurately project the object being measured. The importance of POMEAS double telecentric lenses in measurement systems is reflected in three dimensions:

1. Establishment of accuracy benchmarks

For the dimensional measurement of precision parts (such as semiconductor chips, micro connectors, precision gears, etc.), even micron-level or sub-micron-level errors can lead to product failure. POMEAS double telecentric lenses strictly control optical distortion (usually ≤0.1%) and magnification error (≤0.05%), providing “zero deviation” raw image data for the measurement system and ensuring that subsequent algorithm analysis is based on “true dimensions” rather than “distorted images,” becoming the “first guarantee” of system accuracy.

2. The “all-rounder” for complex scenarios

In industrial measurement, the objects being measured often have reflective surfaces, height differences (such as steps and grooves), and require multi-angle observation. The POMEAS LTDC series innovatively achieves dual-mode adaptation of wide field of view (0.176X) and high precision (0.088X), eliminating the need for frequent lens changes in the measurement system and greatly improving inspection efficiency and compatibility.

3. The “ultimate guardian” of measurement stability

Traditional lens measurement results are easily affected by fluctuations in object distance (such as slight tilting of the workpiece or conveyor belt vibration) and changes in light source angle, leading to poor repeatability of measurement data for the same batch of products. POMEAS double telecentric lenses, through optimized optical design, ensure that the magnification remains constant within a certain object distance range (usually ±5% of the working distance), fundamentally eliminating “measurement errors caused by the positional deviation of the measured object” and allowing the system to maintain stable accuracy during long-term, large-volume inspections, becoming a “reliable quality gatekeeper” in industrial automation production lines.

Q：How does POMEAS double telecentric lens achieve high-precision measurement?

1. Double telecentric optical design

The entrance pupil of a telecentric lens is located at infinity, ensuring that the principal rays from all points on the measured object are parallel to the optical axis. The exit pupil of a telecentric lens is also located at infinity, ensuring that the principal rays from all points on the image plane are parallel to the optical axis. This ensures that even if the camera sensor is slightly tilted or out of focus, it will not affect the accuracy of the image size, further enhancing the system's interference resistance, with measurement errors controllable within 0.001 mm.

2. High-precision optical components and optical path optimization

The use of ultra-low dispersion glass material and multi-layer coating technology reduces refractive differences between light of different wavelengths, preventing “chromatic aberration” that causes blurred edges (such as colored ghosting around the edges of metal parts), ensuring the “sharpness” of object edges in black-and-white images and enhancing image contrast (especially for transparent objects and reflective metals). This allows measured features (such as edges and holes) to be clearly separated from the background, providing high-quality raw data for the algorithm's “sub-pixel-level edge extraction.”

3. Strict production and calibration processes

Every POMEAS double telecentric lens undergoes precise control throughout the entire process: from the grinding accuracy of optical components to the coaxiality calibration of lens assembly, and finally to the calibration of each unit before leaving the factory, ensuring that every product delivered to users can consistently achieve the nominal accuracy and truly realize a high-precision measurement experience.

As precision manufacturing advances toward the micron and nanometer levels, POMEAS high-precision double telecentric lenses are no longer just a component in measurement systems, but rather a core competitive advantage that determines the upper limit of system performance. With unique double telecentric technology that eliminates the root cause of errors, a wide field of view and high-precision dual-mode design that adapts to all measurement scenarios, and rigorous manufacturing processes that ensure long-term stable accuracy, these lenses are the perfect choice for precision measurement applications.