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

1-24 of 194 models

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LS-SWL-002728.1 mm, F2.8 LWIR thermal lens 28.1 mmM9.5x0.51/3"F2.8--$519.00Quote Ships in 2-3 weeks
LS-SWL-00266.2 mm, F1.1 LWIR thermal lens 6.2 mmM17x0.51/5.6"F1.1--$239.00Quote Ships in 2-3 weeks
LS-SWL-00253.1 mm, F1.1 LWIR thermal lens 3.1 mmM17x0.51/5.6"F1.1--$189.00Quote Ships in 2-3 weeks
LS-SWL-0074180 mm, F1.2, M45x1-mount LWIR thermal lens 180 mmM45x11/1.2"F1.2--$2,029.00 Ships in 2-3 weeks
LS-SWL-0095120 mm, F1.2, M45x1-mount LWIR thermal lens 120 mmM45x11/1.2"F1.2--$1,619.00 Ships in 2-3 weeks
LS-SWL-0180100 mm, F1, M45x1-mount LWIR thermal lens 100 mmM45x11/1.2"F1--$1,379.00 Ships in 2-3 weeks
LS-SWL-0014100 mm, F1.2 LWIR thermal lens 100 mm-1/1.2"F1.2Thermal (LWIR)-$1,359.00 Ships in 2-3 weeks
LS-SWL-018875 mm, F1.2, Flange-mount LWIR thermal lens 75 mmFlange mount1/1.2"F1.2--$1,069.00 Ships in 2-3 weeks
LS-SWL-017575 mm, F1 LWIR thermal lens, BFL 8 mm 75 mmM34x0.51/1.2"F1--$1,069.00 Ships in 2-3 weeks
LS-SWL-017475 mm, F1 LWIR thermal lens, BFL 7.55 mm 75 mmM45x0.51/1.2"F1--$1,079.00 Ships in 2-3 weeks
LS-SWL-015670 mm, F8 LWIR thermal lens 70 mmM12-F8Thermal (LWIR)-$1,019.00 Ships in 2-3 weeks
LS-SWL-006870 mm, F1.2, Flange-mount LWIR thermal lens 70 mmFlange mount1.1"F1.2--$1,019.00 Ships in 2-3 weeks
LS-SWL-002460-180 mm, F3.5, M45x1-mount LWIR thermal lens 60-180 mm (medium-wave / MWIR)M45x11/1.2"F3.5--$899.00 Ships in 2-3 weeks
LS-SWL-018555 mm, F1.2, Flange-mount LWIR thermal lens 55 mmFlange mount1/1.2"F1.2-14 gree @ y=6.8 mm$839.00 Ships in 2-3 weeks
LS-SWL-018455 mm, F1.2 LWIR thermal lens 55 mmM37x0.0.51/1.2"F1.2-14 gree @ y=6.8 mm$839.00 Ships in 2-3 weeks
LS-SWL-007055 mm, F1, M45x1-mount LWIR thermal lens 55 mmM45x11.1"F1--$839.00 Ships in 2-3 weeks
LS-SWL-019450 mm, F1.35, M45x1-mount LWIR thermal lens 50 mmM45x11.1"F1.35-10.14(D)x7.91(H)x5.86(V)(20 mm)$779.00 Ships in 2-3 weeks
LS-SWL-016950 mm, F1.2 LWIR thermal lens, BFL 7.02 mm 50 mm-1/1.2"F1.2Thermal (LWIR)-$779.00 Ships in 2-3 weeks
LS-SWL-015250 mm, F0.9 LWIR thermal lens, BFL 3.75 mm 50 mmM29x0.61"F0.9--$779.00 Ships in 2-3 weeks
LS-SWL-014250 mm, F1.0 LWIR thermal lens 50 mmM45x1.01/2"F1.0--$779.00 Ships in 2-3 weeks
LS-SWL-013150 mm, F1.2 LWIR thermal lens, BFL 8 mm 50 mmM33x0.751/1.2"F1.2--$779.00 Ships in 2-3 weeks
LS-SWL-012850 mm, F0.9 LWIR thermal lens, BFL 11.2 mm 50 mmM57x0.751/1.2"F0.9--$779.00 Ships in 2-3 weeks
LS-SWL-012350 mm, F1.1, Flange-mount LWIR thermal lens, BFL 7.02 mm 50 mmFlange mount1/1.7"F1.1--$779.00 Ships in 2-3 weeks
LS-SWL-010450 mm, F1, Flange-mount LWIR thermal lens, BFL 3.89 mm, dia. 60.4 x L67.02 mm 50 mmFlange mount1/1.7"F1--$779.00 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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