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The combination of the ATN PVS-31 housing with L3Harris 20UM / 20UA tubes represents a versatile, professional-grade Gen 3 Unfilmed White Phosphor configuration.
The 20UM / 20UA series delivers noticeably improved image cleanliness, contrast, and stability compared to the baseline 18UM / 18UA generation, while maintaining a reasonable cost level.
The PVS-31 housing adds ergonomics, low weight, independent pod articulation, and the ability to operate from an external power source.
⚙️ Technical Specifications
| Parameter | Value |
|---|---|
| Housing | ATN PVS-31 |
| IIT Type | L3Harris 20UM / 20UA |
| Tube Format | MX-10160 |
| Phosphor | White Phosphor |
| Figure of Merit (FOM) | ≥ 2000+ |
| Signal-to-Noise Ratio (SNR) | ≥ 28 |
| Resolution (RES) | ≥ 64 lp/mm |
| Halo | ≤ 1.0 |
| EBI | ≤ 2.0 |
| Auto-Gating | Present |
| System Weight | ~450 g |
| Power Supply | 1× CR123A or external power pack |
| Tube Service Life | ≈ 10,000 hours |
Comment / Quality Level
The 20UM / 20UA series represents a clearly noticeable step forward from 18UM:
• a higher signal-to-noise ratio produces a cleaner image;
• improved contrast enables faster object identification;
• lower EBI enhances performance in near-total darkness;
• the inherent stability of the unfilmed architecture improves operation near light sources.
In the ATN PVS-31 housing, this optical configuration demonstrates high effectiveness in real field-use scenarios and provides comfortable long-duration observation.
Suitable For
• Observation operators who require a cleaner and more contrast-rich image than entry-level series.
• UAV operators working in minimal ambient light who require high-quality detail recognition.
• Facility-security units that prioritize reliability and proven Gen 3 Unfilmed stability.
• Users migrating from XLS / XLSH or Photonis systems who want L3Harris image cleanliness.
• Mobile teams operating in variable lighting environments.
• Civilian users seeking high-level L3Harris performance without the cost of full contract-grade series.