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

169-192 of 194 models

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LS-SWL-01605 mm, F1.2 LWIR thermal lens 5 mmM20x0.751/5.6"F1.2--$219.00 Ships in 2-3 weeks
LS-SWL-01595 mm, F1.2 LWIR thermal lens 5 mmM20x0.751/5.6"F1.2--$219.00 Ships in 2-3 weeks
LS-SWL-01195.3 mm, F1.2 LWIR thermal lens 5.3 mmM12.8x0.51/3.2"F1.2--$219.00 Ships in 2-3 weeks
LS-SWL-01134.8 mm, F1 LWIR thermal lens 4.8 mmM17x0.751/1.7"F1--$219.00 Ships in 2-3 weeks
LS-SWL-00794.8 mm, F1.2 LWIR thermal lens 4.8 mmM34x0.51/1.7"F1.2--$219.00 Ships in 2-3 weeks
LS-SWL-00325.6 mm, F1.0, M45x1-mount LWIR thermal lens 5.6 mmM45x1-F1.0140 (H) x 110 (V)-$229.00 Ships in 2-3 weeks
LS-SWL-00315.5 mm, F1.0, Flange-mount LWIR thermal lens 5.5 mmFlange mount-F1.070° D (effective)-$229.00 Ships in 2-3 weeks
LS-SWL-01893.7 mm, F1.1 LWIR thermal lens 3.7 mm (new)M101/5.6"F1.1--$199.00 Ships in 2-3 weeks
LS-SWL-01793.7 mm, F1.1, M9x0.5-mount LWIR thermal lens 3.7 mmM9x0.51/5.6"F1.1--$199.00 Ships in 2-3 weeks
LS-SWL-01184.5 mm, F1.2 LWIR thermal lens 4.5 mmM11.6x0.51/3.2"F1.2--$209.00 Ships in 2-3 weeks
LS-SWL-00724.3 mm, F1.2 LWIR thermal lens 4.3 mmM9x0.251/5.6"F1.2--$209.00 Ships in 2-3 weeks
LS-SWL-00634 mm, F1.2 LWIR thermal lens 4 mmM161/2"F1.2--$209.00 Ships in 2-3 weeks
LS-SWL-00593.7 mm, F1.2 LWIR thermal lens 3.7 mmM20x0.51/3.2"F1.2--$199.00 Ships in 2-3 weeks
LS-SWL-00544 mm, F1 LWIR thermal lens, BFL 5.3 mm 4 mmM17x0.751/5.6"F1--$209.00 Ships in 2-3 weeks
LS-SWL-00504 mm, F1 LWIR thermal lens, BFL 7.5 mm 4 mmM34x0.51/2"F1--$209.00 Ships in 2-3 weeks
LS-SWL-00304.6 mm, F1.0 LWIR thermal lens 4.6 mmM34x0.5-F1.0120° D (effective)-$209.00 Ships in 2-3 weeks
LS-SWL-00294.4 mm, F1.0, M45x1-mount LWIR thermal lens 4.4 mmM45x1-F1.0180 (H) x 136 (V)-$209.00 Ships in 2-3 weeks
LS-SWL-00283.8 mm, F1.0 LWIR thermal lens 3.8 mmM34x0.5-F1.0180° D (effective)-$199.00 Ships in 2-3 weeks
LS-SWL-00223.7 mm, F1 LWIR thermal lens 3.7 mmM20x0.51/2"F1--$199.00 Ships in 2-3 weeks
LS-SWL-01922.64 mm, F1.1 LWIR thermal lens 2.64 mmM17x0.751/3.6"F1.1--$189.00 Ships in 2-3 weeks
LS-SWL-01413.5 mm, F1.0 LWIR thermal lens 3.5 mmM34x0.751/2"F1.0--$199.00 Ships in 2-3 weeks
LS-SWL-00433.5 mm, F1 LWIR thermal lens 3.5 mmM14x0.51/5.6"F1--$199.00 Ships in 2-3 weeks
LS-SWL-01931.8 mm, F1.1 LWIR thermal lens 1.8 mmM17x0.51/5.6"F1.1--$179.00 Ships in 2-3 weeks
LS-SWL-01912.1 mm, F1.1 LWIR thermal lens 2.1 mmM16-F1.1-Thermal (LWIR)$179.00 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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