The primary difference between telecentric lenses and ordinary lenses lies in their optical properties and applications.
Telecentric Industrial Lenses:
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Telecentric lenses are specifically designed to correct for the parallax of traditional industrial lenses. Within a certain object distance range, they maintain a constant magnification ratio regardless of changes in object distance. This is crucial for applications where objects are not on the same plane.
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Telecentric lenses effectively address issues commonly encountered with ordinary lenses, such as varying magnification due to object distance changes, significant lens distortion, and changes in magnification as the object distance increases.
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They offer high resolution and minimize uncertainty in image edge positions caused by the geometric characteristics of visual light sources.
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Telecentric lenses are commonly used in high-precision measurement and metrology applications due to their superior optical quality and consistent magnification.
Ordinary Lenses:
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Ordinary lenses have varying magnification as objects move closer to the lens (shorter working distance). This leads to changes in the resulting image size.
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They may exhibit parallax, distortion, and resolution limitations, especially at close distances.
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Ordinary lenses are more cost-effective, practical, and versatile than telecentric lenses.
Applications:
- Ordinary lenses are suitable for imaging large objects and have widespread applications due to their affordability and versatility.
- Telecentric lenses are ideal for applications requiring consistent magnification, minimal distortion, and precise measurements. They are commonly used in metrology, CCD-based measurements, and microcrystallography.
In summary, while ordinary lenses are practical and cost-effective for general imaging purposes, telecentric lenses offer superior performance in terms of maintaining consistent magnification and minimizing optical distortions, making them indispensable for precision measurement applications. However, they come at a higher cost and are larger and heavier in size.
FALenses Technology specializes in providing machine vision core hardware. You can go to the official website of FALenses Technology at https://www.falenses.com/ for more information.