The SJ-1-70 Strapdown Laser Seeker rapidly identifies and captures laser-designated targets during the terminal guidance phase, computes the deviation angle of the target from the optical axis, and guides the vehicle precisely onto the target. Its four-quadrant laser detector operates at the 1.064 µm designation wavelength with a ±15° field of view and ±10° linear zone, detecting coded laser energy at 3 km or more with a blind zone of only 50 m. Both precise frequency code and pseudo-random code laser encoding are supported, providing strong rejection of sun glint and countermeasures. Detection accuracy is 0.3° or better, dynamic output delay is ≤5 ms, and the seeker reacquires the target within 1 s of signal loss — key advantages in cluttered terminal environments. The miniaturized strapdown design measures Φ70 × 88 mm (reducible to Φ40) and weighs ≤240 g while withstanding 10000 g overload, making it widely applicable to various smart munitions. It draws ≤10 W from a 12 V supply and operates from −40 °C to +60 °C.
Specifications
| Parameter | Value | Unit |
|---|---|---|
| Dimensions | Φ70×88 (minimum customizable to Φ40) | mm |
| Weight | ≤240 | g |
| Overload resistance | 10000 | g |
| Detector type | Four-quadrant laser detector (1.064 µm wavelength) | – |
| Field of view | ±15 | ° |
| Linear zone | ±10 | ° |
| Detection range | ≥3000 (blind zone ≤50) | m |
| Laser encoding | Precise frequency code or pseudo-random code | – |
| Detection accuracy | ≤0.3 | ° |
| Dynamic output delay | ≤5 | ms |
| Reacquisition capability | Re-capture target within 1 s after loss | – |
| Power supply | 12 V, average ≤10 | W |
| Working temperature | −40 to +60 | °C |
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