OPFI series
Filters for telecentric lenses and fixed focal length lenses
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Light filtering is a typical need in machine vision applications. Together with LED illuminators, filters can improve image contrast by blocking unwanted light and increase the accuracy and repeatability of the vision system.
Ambient light is very frequently causing errors in imaging systems due to unwanted reflections off the surface of the parts being measured. In these cases, a band pass or long pass filter that matches the emission wavelength of the illuminator is usually integrated in front of the imaging lens: this way, only the light coming from the illuminator is collected while the rest of the spectrum is cut out.
Furthermore, many machine vision applications require monochrome illumination in order to enhance or suppress particular object features: under these conditions, only the features with a certain color are imaged and inspected.
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Application examples
PCB Inspection: The layout of the printed circuit would be difficult to distinguish without the filter. A high transmission green band pass filter increases contrast and improves system accuracy.
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| Main optical specifications | Mechanical specifications | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Part number |
Additional notes |
Type | Light color |
Wavelength range |
Cut-on 50% transmittance |
Cut-off 50% transmittance |
Spectral FWHM |
Filter thread |
Outer diameter |
Clear aperture |
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| (nm) | (nm) | (nm) | (nm) | (mm) | (mm) | ||||||
| 1 | 1 | 1 | |||||||||
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| FTBP470C25.4 | band pass | blue | 410 - 500 | - | - | 90 | C-mount | 25.4 | 19.5 |
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| FTBP525C25.4 | band pass | green | 500 - 550 | - | - | 50 | C-mount | 25.4 | 19.5 |
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| FTBP635C25.4 | band pass | red | 595 - 675 | - | - | 80 | C-mount | 25.4 | 19.5 |
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| FTBP660C25.4 | band pass | dark red | 640 - 695 | - | - | 55 | C-mount | 25.4 | 19.5 |
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| FTBP850C25.4 | band pass | IR | 800 - 880 | - | - | 80 | C-mount | 25.4 | 19.5 |
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| FTSP450C25.4 | short pass | dark blue | 370 - 440 | - | 440 | - | C-mount | 25.4 | 19.5 |
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| FTSP500C25.4 | short pass | blue | 365 - 495 | - | 495 | - | C-mount | 25.4 | 19.5 |
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| FTSP570C25.4 | short pass | cyan | 330 - 575 | - | 575 | - | C-mount | 25.4 | 19.5 |
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| FTSP700C25.4 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | C-mount | 25.4 | 19.5 |
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| FTLP510C25.4 | long pass | yellow | 515 - 1100 | 515 | - | - | C-mount | 25.4 | 19.5 |
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| FTLP550C25.4 | long pass | orange | 555 - 1100 | 555 | - | - | C-mount | 25.4 | 19.5 |
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| FTLP590C25.4 | long pass | red | 595 - 1100 | 595 | - | - | C-mount | 25.4 | 19.5 |
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| FTLP640C25.4 | long pass | dark red | 640 - 1100 | 640 | - | - | C-mount | 25.4 | 19.5 |
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| FTBP470M27 | band pass | blue | 410 - 500 | - | - | 90 | M27 x 0.5 | 30.0 | 22.5 |
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| FTBP525M27 | band pass | green | 500 - 550 | - | - | 50 | M27 x 0.5 | 30.0 | 22.5 |
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| FTBP635M27 | band pass | red | 595 - 675 | - | - | 80 | M27 x 0.5 | 30.0 | 22.5 |
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| FTBP660M27 | band pass | dark red | 640 - 695 | - | - | 55 | M27 x 0.5 | 30.0 | 22.5 |
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| FTBP850M27 | band pass | IR | 800 - 880 | - | - | 80 | M27 x 0.5 | 30.0 | 22.5 |
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| FTSP450M27 | short pass | dark blue | 370 - 440 | - | 440 | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTSP500M27 | short pass | blue | 365 - 495 | - | 495 | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTSP570M27 | short pass | cyan | 330 - 575 | - | 575 | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTSP700M27 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTLP510M27 | long pass | yellow | 515 - 1100 | 515 | - | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTLP550M27 | long pass | orange | 555 - 1100 | 555 | - | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTLP590M27 | long pass | red | 595 - 1100 | 595 | - | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTLP640M27 | long pass | dark red | 640 - 1100 | 640 | - | - | M27 x 0.5 | 30.0 | 22.5 |
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| FTBP470M30.5 | band pass | blue | 410 - 500 | - | - | 90 | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTBP525M30.5 | band pass | green | 500 - 550 | - | - | 50 | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTBP635M30.5 | band pass | red | 595 - 675 | - | - | 80 | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTBP660M30.5 | band pass | dark red | 640 - 695 | - | - | 55 | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTBP850M30.5 | band pass | IR | 800 - 880 | - | - | 80 | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTSP450M30.5 | short pass | dark blue | 370 - 440 | - | 440 | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTSP500M30.5 | short pass | blue | 365 - 495 | - | 495 | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTSP570M30.5 | short pass | cyan | 330 - 575 | - | 575 | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTSP700M30.5 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTLP510M30.5 | long pass | yellow | 515 - 1100 | 515 | - | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTLP550M30.5 | long pass | orange | 555 - 1100 | 555 | - | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTLP590M30.5 | long pass | red | 595 - 1100 | 595 | - | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTLP640M30.5 | long pass | dark red | 640 - 1100 | 640 | - | - | M30.5 x 0.5 | 33.5 | 25.5 |
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| FTBP470M35.5 | band pass | blue | 410 - 500 | - | - | 90 | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTBP525M35.5 | band pass | green | 500 - 550 | - | - | 50 | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTBP635M35.5 | band pass | red | 595 - 675 | - | - | 80 | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTBP660M35.5 | band pass | dark red | 640 - 695 | - | - | 55 | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTBP850M35.5 | band pass | IR | 800 - 880 | - | - | 80 | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTSP450M35.5 | short pass | dark blue | 370 - 440 | - | 440 | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTSP500M35.5 | short pass | blue | 365 - 495 | - | 495 | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTSP570M35.5 | short pass | cyan | 330 - 575 | - | 575 | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTSP700M35.5 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTLP510M35.5 | long pass | yellow | 515 - 1100 | 515 | - | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTLP550M35.5 | long pass | orange | 555 - 1100 | 555 | - | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTLP590M35.5 | long pass | red | 595 - 1100 | 595 | - | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTLP640M35.5 | long pass | dark red | 640 - 1100 | 640 | - | - | M35.5 x 0.5 | 38.5 | 30.5 |
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| FTBP470M43 | band pass | blue | 410 - 500 | - | - | 90 | M43 x 0.75 | 46.0 | 38.0 |
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| FTBP525M43 | band pass | green | 500 - 550 | - | - | 50 | M43 x 0.75 | 46.0 | 38.0 |
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| FTBP635M43 | band pass | red | 595 - 675 | - | - | 80 | M43 x 0.75 | 46.0 | 38.0 |
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| FTBP660M43 | band pass | dark red | 640 - 695 | - | - | 55 | M43 x 0.75 | 46.0 | 38.0 |
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| FTBP850M43 | band pass | IR | 800 - 880 | - | - | 80 | M43 x 0.75 | 46.0 | 38.0 |
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| FTSP450M43 | short pass | dark blue | 370 - 440 | - | 440 | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTSP500M43 | short pass | blue | 365 - 495 | - | 495 | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTSP570M43 | short pass | cyan | 330 - 575 | - | 575 | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTSP700M43 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTLP510M43 | long pass | yellow | 515 - 1100 | 515 | - | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTLP550M43 | long pass | orange | 555 - 1100 | 555 | - | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTLP590M43 | long pass | red | 595 - 1100 | 595 | - | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTLP640M43 | long pass | dark red | 640 - 1100 | 640 | - | - | M43 x 0.75 | 46.0 | 38.0 |
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| FTBP470M52 | band pass | blue | 410 - 500 | - | - | 90 | M52 x 0.75 | 55.0 | 47.0 |
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| FTBP525M52 | band pass | green | 500 - 550 | - | - | 50 | M52 x 0.75 | 55.0 | 47.0 |
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| FTBP635M52 | band pass | red | 595 - 675 | - | - | 80 | M52 x 0.75 | 55.0 | 47.0 |
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| FTBP660M52 | band pass | dark red | 640 - 695 | - | - | 55 | M52 x 0.75 | 55.0 | 47.0 |
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| FTBP850M52 | band pass | IR | 800 - 880 | - | - | 80 | M52 x 0.75 | 55.0 | 47.0 |
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| FTSP450M52 | short pass | dark blue | 370 - 440 | - | 440 | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTSP500M52 | short pass | blue | 365 - 495 | - | 495 | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTSP570M52 | short pass | cyan | 330 - 575 | - | 575 | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTSP700M52 | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTLP510M52 | long pass | yellow | 515 - 1100 | 515 | - | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTLP550M52 | long pass | orange | 555 - 1100 | 555 | - | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTLP590M52 | long pass | red | 595 - 1100 | 595 | - | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTLP640M52 | long pass | dark red | 640 - 1100 | 640 | - | - | M52 x 0.75 | 55.0 | 47.0 |
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| FTBP470TC | a | band pass | blue | 410 - 500 | - | - | 90 | TC insert | 24.5 | 15.0 |
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| FTBP525TC | a | band pass | green | 500 - 550 | - | - | 50 | TC insert | 24.5 | 15.0 |
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| FTBP635TC | a | band pass | red | 595 - 675 | - | - | 80 | TC insert | 24.5 | 15.0 |
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| FTBP660TC | a | band pass | dark red | 640 - 695 | - | - | 55 | TC insert | 24.5 | 15.0 |
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| FTBP850TC | a | band pass | IR | 800 - 880 | - | - | 80 | TC insert | 24.5 | 15.0 |
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| FTBP880TC | a | band pass | IR | 835 - 975 | - | - | 140 | TC insert | 24.5 | 15.0 |
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| FTSP450TC | a | short pass | dark blue | 370 - 440 | - | 440 | - | TC insert | 24.5 | 15.0 |
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| FTSP500TC | a | short pass | blue | 365 - 495 | - | 495 | - | TC insert | 24.5 | 15.0 |
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| FTSP570TC | a | short pass | cyan | 330 - 575 | - | 575 | - | TC insert | 24.5 | 15.0 |
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| FTSP700TC | a | UV+NIR cut off | VIS | 400 - 700 | 400 | 700 | - | TC insert | 24.5 | 15.0 |
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| FTLP510TC | a | long pass | yellow | 515 - 1100 | 515 | - | - | TC insert | 24.5 | 15.0 |
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| FTLP550TC | a | long pass | orange | 555 - 1100 | 555 | - | - | TC insert | 24.5 | 15.0 |
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| FTLP590TC | a | long pass | red | 595 - 1100 | 595 | - | - | TC insert | 24.5 | 15.0 |
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| FTLP640TC | a | long pass | dark red | 640 - 1100 | 640 | - | - | TC insert | 24.5 | 15.0 |
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| FTLP920TC | a | long pass | NIR | 920 - 2300 | 920 | - | - | TC insert | 24.5 | 15.0 |
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| FTPR032TC | a | linear polarizing | VIS | - | - | - | - | TC insert | 24.5 | 15.0 |
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Last update 05 Jul 2022
Notes
- Tolerance +/- 10 nm
Additional notes
- Except for TC23004, TC23007, TC23009 and TC23012. For other telecentric lens some vignetting may occur, depending on sensor size.
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