LWIR 8–12 μm · Athermalized fixed-focus reference
19 mm F/0.9 Athermalized LWIR Lens (KIA001901)
KIA001901 is a 19 mm F/0.9 athermalized, fixed-focus LWIR reference for 8–12 μm imaging. Its published detector reference is 640 × 512 with 17 μm pixels, giving a 31° × 25.4° field of view. Compared with the KI610011 reference on the same detector format, it offers a wider scene window. Choose between them using the required field of view and installation constraints.
Full parameter record
19 mm F/0.9 Athermalized LWIR Lens (KIA001901) – 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 | 19 mm |
| F/# | 0.9 |
| Working wavelength | 8–12 μm |
| Detector reference | 640 × 512 / 17 μm |
| Field of view | 31° × 25.4° |
| Average transmission | ≥92% AR reference |
| Distortion | 4.7% |
| Front coating | AR |
| Focus | Fixed (athermalized) |
| Depth of field | 15 m–∞ |
| Weight | ≤35 g |
| Dimensions | Φ30 mm × 26 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 KIA001901 for your system
The source record lists an envelope of Φ30 mm × 26 mm and a weight reference of ≤35 g. Confirm the mount and flange-distance requirements against the approved drawing. The source also lists a 15 m–∞ depth-of-field reference; close-range use needs separate review. Do not equate F/0.9 or the published field of view with a guaranteed system sensitivity or recognition range.
Configuration reference
| Spectral reference | 8–12 μm |
|---|---|
| Focal length / F/# | 19 mm / F/0.9 |
| Detector reference | 640 × 512 / 17 μm |
| Reference FOV | 31° × 25.4° |
| Published envelope | Φ30 mm × 26 mm |
| Depth-of-field reference | 15 m–∞ |
| Weight reference | ≤35 g |
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.
Does the published 31° × 25.4° field of view apply to every detector?
No. It is the reference for 640 × 512 / 17 μm. A different detector format or pixel pitch changes the system comparison and requires confirmation.
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 KIA001901
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.