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

73-96 of 194 models

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LS-SWL-013825 mm, F1.2 LWIR thermal lens, BFL 8.5 mm 25 mmM34x1.51/2.7"F1.2--$489.00 Ships in 2-3 weeks
LS-SWL-013625 mm, F1.0 LWIR thermal lens, BFL 8.5 mm 25 mmM34x0.751/2"F1.0--$489.00 Ships in 2-3 weeks
LS-SWL-012725 mm, F1, Flange-mount LWIR thermal lens, BFL 8.22 mm 25 mmFlange mount1/3.2"F1--$489.00 Ships in 2-3 weeks
LS-SWL-011125 mm, F1, Flange-mount LWIR thermal lens, BFL 4.89 mm 25 mmFlange mount1/5.6"F1--$489.00 Ships in 2-3 weeks
LS-SWL-009825 mm, F1.4, Flange-mount LWIR thermal lens 25 mmFlange mount1/1.7"F1.4--$489.00 Ships in 2-3 weeks
LS-SWL-005825 mm, F1 LWIR thermal lens, BFL 9 mm 25 mmM25x0.51/1.7"F1--$489.00 Ships in 2-3 weeks
LS-SWL-004925 mm, F1 LWIR thermal lens, BFL 7.1 mm 25 mmM25x0.751/1.7"F1--$489.00 Ships in 2-3 weeks
LS-SWL-003925 mm, F1.1 LWIR thermal lens 25 mmM31x2.251/1.7"F1.1--$489.00 Ships in 2-3 weeks
LS-SWL-003325 mm, F1 LWIR thermal lens, BFL 8.5 mm 25 mmM33x0.751/2"F1--$489.00 Ships in 2-3 weeks
LS-SWL-015422 mm LWIR thermal lens 22 mmM22.6x0.51/1.8"-Thermal (LWIR)-$449.00 Ships in 2-3 weeks
LS-SWL-019019 mm, F1 LWIR thermal lens, BFL 7.5 mm, dia. 31.6 x L24.3 mm 19 mmM25x0.751/1.7"F1--$409.00 Ships in 2-3 weeks
LS-SWL-017219 mm, F1.2 LWIR thermal lens 19 mmM17x0.751/2"F1.2--$409.00 Ships in 2-3 weeks
LS-SWL-017119 mm, F1.2 LWIR thermal lens 19 mmM17x0.751/2"F1.2--$409.00 Ships in 2-3 weeks
LS-SWL-015519 mm, F2.2 LWIR thermal lens 19 mmM101/5.6"F2.2--$409.00 Ships in 2-3 weeks
LS-SWL-015019-30 mm, F1.1 LWIR thermal lens 19-30 mmM26x0.51/2"F1.1--$409.00 Ships in 2-3 weeks
LS-SWL-013019 mm, F1, Flange-mount LWIR thermal lens, BFL 5.425 mm 19 mmFlange mount1/3.2"F1--$409.00 Ships in 2-3 weeks
LS-SWL-009219 mm, F1, Flange-mount LWIR thermal lens, BFL 3.89 mm 19 mmFlange mount1/5.6"F1--$409.00 Ships in 2-3 weeks
LS-SWL-008219 mm, F1, Flange-mount LWIR thermal lens, BFL 9 mm 19 mmFlange mount1/1.7"F1--$409.00 Ships in 2-3 weeks
LS-SWL-005719 mm, F1 LWIR thermal lens, BFL 9 mm, dia. 28 x L20 mm 19 mmM25x0.51/1.7"F1--$409.00 Ships in 2-3 weeks
LS-SWL-004019 mm, F1 LWIR thermal lens, BFL 9.5 mm, dia. 38 x L21.5 mm 19 mmM34x0.51/1.2"F1--$409.00 Ships in 2-3 weeks
LS-SWL-003619 mm, F1 LWIR thermal lens, BFL 7.43 mm, dia. 28 x L24.6 mm 19 mmM25x0.751/2"F1--$409.00 Ships in 2-3 weeks
LS-SWL-001519 mm, F1 LWIR thermal lens, BFL 7.43 mm, dia. 28 x L28 mm 19 mmM25x0.751/1.7"F1--$409.00 Ships in 2-3 weeks
LS-SWL-001119 mm, F1 LWIR thermal lens, BFL 9 mm, dia. 30 x L22.3 mm 19 mmM25x0.52/3"F1--$409.00 Ships in 2-3 weeks
LS-SWL-009418.24 mm, F0.8, M50x1-mount LWIR thermal lens 18.24 mm (2.5x)M50x11"F0.8-4.9×3.6 mm$459.00 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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