LWIR 8-12 um – uncooled and cooled detector systems
75 mm F/1 Manual-Focus LWIR Lens
Longer-focal-length LWIR objective with manual focusing for a 12 μm detector reference.
Full parameter record
75 mm F/1 Manual-Focus LWIR Lens – published specifications
Every value below is the reference record for this configuration. Values marked as a reference, a target or a minimum are confirmed against the detector datasheet and the approved drawing before a quotation is issued.
| Parameter | Published value |
|---|---|
| Focal length | 75 mm |
| F/# | 1.0 |
| Working wavelength | 8–12 μm |
| Detector reference | 640 × 512 / 12 μm |
| Field of view | 5.86° × 4.69° |
| Average transmission | ≥88% DLC reference |
| Distortion | −0.8% |
| Focus | Manual, 5 m–∞ |
| Weight | ≤260 g |
| Dimensions | Φ81.5 × 92.36 mm |
| Operating / storage | −40 to +60 °C / −50 to +70 °C |
| Sealing reference | Front element IP67 |
Reference policy: the signed quotation, approved drawing, sample and inspection plan define the delivered performance, coating, sealing, MOQ and lead time. Values published here are engineering references for screening, not a guaranteed specification.
Before this configuration is released
What to confirm with us
Send these five inputs and the quotation can be prepared against your system rather than against a catalogue headline.
01Detector type, resolution and pixel pitch of the microbolometer or cooled array
02Required horizontal field of view, or the focal length and whether focus is fixed, manual or motorized
03Athermalization target across the full operating temperature range
04Mount, flange distance, mass and the available envelope on the host system
05Sealing target, purge or desiccant handling, and the acceptance test documents required
Related references
Other configurations in the same family
- 15–300 mm MWIR Continuous-Zoom Lens
- 18–275 mm Compact MWIR Continuous-Zoom Lens
- 25/50 mm Dual-FOV LWIR Lens
- 100 mm F/1.2 Athermalized LWIR Lens
Browse the full category page: Infrared Lenses.
Send the detector data and we will confirm the fit.
Share the detector type, resolution, pixel pitch, required field of view and the mechanical envelope. We will return the configuration route, the documents we can issue and the next sourcing step.