Lenses

LWIR thermal imaging lenses

Lenses for the 8 to 14 µm band

Long-wave infrared lenses for thermal cameras and uncooled detector cores. Compare focal length, F-number, detector format, mount and back focal length.

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LWIR thermal imaging lenses

49-72 of 194 models

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LS-SWL-016335 mm, F1 LWIR thermal lens, BFL 7 mm, dia. 43 x L40.5 mm 35 mmM34x0.51/1.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-014935 mm, F1, M45x1-mount LWIR thermal lens 35 mmM45x11/1.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-014335 mm, F1.0 LWIR thermal lens 35 mmM45x1.01/2"F1.0--$609.00 Ships in 2-3 weeks
LS-SWL-012635 mm, F0.9 LWIR thermal lens 35 mmM46x0.751/1.7"F0.9--$609.00 Ships in 2-3 weeks
LS-SWL-012235 mm, F1, Flange-mount LWIR thermal lens, BFL 3.83 mm 35 mmFlange mount1/1.7"F1--$609.00 Ships in 2-3 weeks
LS-SWL-011735 mm, F1, Flange-mount LWIR thermal lens, BFL 4.89 mm 35 mmFlange mount1/1.7"F1--$609.00 Ships in 2-3 weeks
LS-SWL-010735 mm, F1, Flange-mount LWIR thermal lens, BFL 4.22 mm 35 mmFlange mount1/3.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-010235 mm, F1, Flange-mount LWIR thermal lens, BFL 3.89 mm 35 mmFlange mount1/1.7"F1--$609.00 Ships in 2-3 weeks
LS-SWL-008035 mm, F1 LWIR thermal lens, BFL 8.3 mm, dia. 45.7 x L47.7 mm 35 mmM33x0.751/1.7"F1--$609.00 Ships in 2-3 weeks
LS-SWL-007135 mm, F1 LWIR thermal lens, BFL 11 mm, dia. 47.6 x L48.5 mm 35 mmM33x0.51/2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-004135 mm, F1 LWIR thermal lens, BFL 7.5 mm, dia. 45 x L45.4 mm 35 mmM33x0.751/1.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-003735 mm, F1 LWIR thermal lens, BFL 8.01 mm, dia. 43 x L39.5 mm 35 mmM34x0.51/1.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-001835 mm, F1.0, Flange-mount LWIR thermal lens 35 mmFlange mount1/2"F1.0--$609.00 Ships in 2-3 weeks
LS-SWL-000435 mm, F1.1 LWIR thermal lens 35 mmM34x0.751/1.2"F1.1--$609.00 Ships in 2-3 weeks
LS-SWL-008333 mm, F1.2 LWIR thermal lens 33 mm (macro)M30x0.751/1.7"F1.28.48×6.39×5.10 mm-$579.00 Ships in 2-3 weeks
LS-SWL-008932 mm, F1, M45x1-mount LWIR thermal lens 32 mmM45x11.2"F1--$609.00 Ships in 2-3 weeks
LS-SWL-006730 mm, F1, M45x1-mount LWIR thermal lens 30 mmM45x11.1"F1--$549.00 Ships in 2-3 weeks
LS-SWL-000830-150 mm, F1.2, M45x1-mount LWIR thermal lens 30-150 mmM45x11/1.2"F1.2--$639.00 Ships in 2-3 weeks
LS-SWL-000228 mm, F2.8, Flange-mount LWIR thermal lens 28 mmFlange mount-F2.8-Thermal (LWIR)$519.00 Ships in 2-3 weeks
LS-SWL-018626 mm, F1.2 LWIR thermal lens 26 mmM32x0.751/1.2"F1.2--$499.00 Ships in 2-3 weeks
LS-SWL-018325 mm, F1 LWIR thermal lens, BFL 9.5 mm 25 mmM34x0.51/1.2"F1--$489.00 Ships in 2-3 weeks
LS-SWL-015725 mm, F1.2 LWIR thermal lens, BFL 15.8 mm 25 mmM32x1.51/2.7"F1.2--$489.00 Ships in 2-3 weeks
LS-SWL-014825 mm, F1.2 LWIR thermal lens, BFL 11.1 mm 25 mmM34x0.751/1.2"F1.2--$489.00 Ships in 2-3 weeks
LS-SWL-014025 mm, F1.0 LWIR thermal lens, BFL 7.5 mm 25 mmM45x1.01/2"F1.0--$489.00 Ships in 2-3 weeks

Lenses for the 8 to 14 µm band

Thermal imaging in the long-wave infrared uses wavelengths of roughly 8 to 14 µm, which optical glass does not transmit, so these lenses are made from infrared materials. Uncooled detectors need a lot of energy, which is why thermal lenses have low F-numbers, and the lens is matched to the detector by its pixel pitch and pixel count.

  • Calculate the detector size from pixel count and pixel pitch and compare it with the format the lens covers.
  • Choose the focal length from the field of view; compare the F-number, since a lower one gives the detector more signal.
  • Check the mount thread and the back focal length against the camera core, and whether the model is fixed focus, manual focus or athermalised.

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