Telecentric industrial lens is a category of industrial lens with many technical advantages, which can make up for some deficiencies of ordinary industrial lens in inspection, and is an important optical accessory in high-precision visual inspection.
Understanding the techniques of using telecentric industrial lenses requires first understanding the application of telecentric lenses,According to the design principle and unique advantages of telecentric industrial lenses, it is best to use telecentric lenses when encountering the following inspection situations:
1. When the detected object has thickness;
2.When the position of the detection object is uncertain; not in the same plane;2, When the position of the detection object is uncertain; not in the same plane;
3. When the working distance of the detected object will change;
4.When the detected object is with aperture, three-dimensional;
5. When low distortion, image effect, and brightness are required to be almost identical;
6. When defects can only be detected under parallel illumination in the same direction.
The telecentric industrial lens has a variety of models, in the selection, to understand the telecentric lens related parameters in order to better selection.
Working distance: the distance of the lowest surface of the lens from the subject. In the actual project, the vision system should be considered first, so that the choice of lens working distance is not limited by mechanical space, so as to ensure the optical performance while reducing costsWorking distance: the distance of the lowest surface of the lens from the subject. In the actual project, the vision system should be considered first, so that the choice of lens working distance is not limited by mechanical space, so as to ensure the optical performance while reducing costs.
Telecentricity: refers to the magnification error of the object, the smaller the magnification error, the higher the telecentricity. Telecentricity can affect the use of the lens.
Distortion rate: the lens aberration when imaging an optical lens, the lower the distortion rate, the higher the imaging accuracy.POMEAS telecentric industrial lenses have an distortion rate of 0.02% or less.
Resolution: the ability of the lens to clearly distinguish the details of the subject, the higher the resolution, the better the quality of the image.
Depth of field: Depending on the magnification, aperture number, wavelength, pixel size, and sensitivity of the edge extraction algorithm used by the customer, the depth of field determines the extent of a clear image.
There are other parameters for telecentric lenses, which can be understood according to the need when selecting the model. The telecentric industrial lens has a unique optical design, which can provide high-quality imaging effect, and in some high-precision inspection scenarios, it can be a good substitute for ordinary industrial lenses.
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