Miniaturised for 42 mm seeker bays, the XHM4201GT delivers ≤ 0.7 mrad angular accuracy and 1400 m vehicle detection as a bare-core OEM precision-guided munition seeker.
Procurement programs for precision-guided munitions have shifted markedly toward smaller, expendable platforms capable of engaging moving vehicle targets without active radar dependency. That shift has created sustained demand for miniaturised electro-optical guidance seekers fitting within the dimensional constraints of small-diameter airframes, where a 40 mm seeker bay and an 80 g mass budget define the integration envelope.
Terminal Guidance Architecture
The XHM4201GT fills that role as a bare-core visible-spectrum EO seeker module built for OEM integration. Operating across the 0.4 to 0.7 µm waveband, the module outputs real-time line-of-sight angular deviation via RS-422 at 50 Hz after target lock, with an angular accuracy of ≤ 0.7 mrad. Vehicle detection range reaches ≥ 1400 m under standard visibility conditions, with a target capture time of ≤ 300 ms. A memory tracking function sustains closed-loop guidance output for one second following temporary target obscuration, preserving engagement continuity in high-dynamic terminal scenarios.
Counter-UAS and Loitering Munition Applications
The module has been validated against a Phantom 4-class quadcopter in counter-UAS interceptor testing, demonstrating consistent acquisition against small multirotor targets in dynamic engagement conditions. For loitering munitions, the 4K CMOS array with a 42° azimuth by 72° elevation field of view provides sufficient angular coverage for late-stage target reacquisition during terminal dive phases. OEM integrators receive the module without external housing, enabling direct installation into 42 mm class seeker bays used across multiple precision-guided airframe families.
Integration and Test Infrastructure
A built-in self-test function supports three modes: pre-installation unit testing, post-installation integrated testing, and online software programming via the USB debug port. The RS-422 angular output interface and UART-accessible parameter control reduce integration effort for flight computer teams working against compressed development timelines. At ≤ 80 g, the XHM4201GT meets the payload constraints of small-diameter guided warheads and sub-kilogram counter-UAS interceptors without requiring structural modifications to existing airframe layouts.
As unit cost reduction becomes a binding constraint across mid-tier precision weapons programs, commercial-off-the-shelf seeker modules qualified against defined target types are likely to displace custom sensor development at volume. The XHM4201GT positions OEM integrators to deliver terminal guidance capability at production scale without the development overhead traditionally associated with bespoke seeker programs.