LWIR 8–12 μm · Athermalized fixed-focus reference
50 mm F/1 Athermalized LWIR Lens (KI805011)
KI805011 is a 50 mm F/1 athermalized, fixed-focus LWIR reference for 8–12 μm imaging. Its published detector reference is 1280 × 1024 with 12 μm pixels, giving a 17.5° × 14° field of view. Use the detector reference together with the focal length when comparing this lens with another 50 mm configuration.
Full parameter record
50 mm F/1 Athermalized LWIR Lens (KI805011) – 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 | 50 mm |
| F/# | 1 |
| Working wavelength | 8–12 μm |
| Detector reference | 1280 × 1024 / 12 μm |
| Field of view | 17.5° × 14° |
| Average transmission | ≥90% HD reference |
| Distortion | 3% |
| Front coating | HD |
| Focus | Fixed (athermalized) |
| Depth of field | 40 m–∞ |
| Dimensions | Φ60 mm × 47.46 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.
How to evaluate KI805011 for your system
Two lenses with the same focal length are not automatically interchangeable: detector format, pixel pitch, required image circle and mechanical interface also matter. The published envelope for KI805011 is Φ60 mm × 47.46 mm. Weight is absent from the source record and must be confirmed against the supplier drawing. The 40 m–∞ depth-of-field reference does not establish a thermal detection distance.
Configuration reference
| Spectral reference | 8–12 μm |
|---|---|
| Focal length / F/# | 50 mm / F/1 |
| Detector reference | 1280 × 1024 / 12 μm |
| Reference FOV | 17.5° × 14° |
| Published envelope | Φ60 mm × 47.46 mm |
| Depth-of-field reference | 40 m–∞ |
| Weight reference | Confirm against the supplier drawing |
Athermalized is the source configuration designation. Ask for the available optical and thermal test evidence for the selected detector and temperature range. The approved drawing, quotation and acceptance plan define the supplied configuration.
Compare the published options
| Model | Focal length / F/# | Detector reference | Reference FOV | Envelope |
|---|---|---|---|---|
| KI610011 | 100 mm / F/1 | 640 × 512 / 17 μm | 6.2° × 5° | Φ113.5 mm × 149.5 mm |
| KI805011 | 50 mm / F/1 | 1280 × 1024 / 12 μm | 17.5° × 14° | Φ60 mm × 47.46 mm |
| KIA001901 | 19 mm / F/0.9 | 640 × 512 / 17 μm | 31° × 25.4° | Φ30 mm × 26 mm |
These field-of-view references use different detector formats. They are not a comparison on one common detector and do not guarantee interchangeability.
Can KI805011 be substituted for a 50 mm lens specified for 640 × 512?
Not on focal length alone. KI805011 is published against a 1280 × 1024 / 12 μm reference. Share the actual detector datasheet, required field of view and mechanical interface so that the configuration can be reviewed.
What to send in your RFQ
- Detector model, resolution, pixel pitch and the detector datasheet.
- Required horizontal and vertical field of view and working distance.
- Mount, flange-distance requirement and the available installation envelope.
- Operating temperature range and the optical acceptance criteria you need verified.
- Sample and production quantities, required documents and delivery schedule.
Request configuration review for KI805011
For wider selection, browse MWIR and LWIR infrared lenses or read the MWIR vs LWIR RFQ guide.
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
- 75 mm F/1 Manual-Focus LWIR Lens
- 25/50 mm Dual-FOV 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.