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China TianYing TY-LR21 is designed to synchronize a 40mJ laser designator and 7km laser rangefinder 20Hz for tank, enables acquisition of tank 11 km and plane 20 km within 2 m accuracy in 23.5km visibility in ultra-compact unit weighs only 460 g, matched to mid-high altitude and long range EO systems.

The 40mj laser designator 7km laser rangefinder features fully military details, excellent coding compatibility, excellent coding scalability, excellent laser sensitivity, the lightest weight and the smallest size, effective on platforms from man-portability, land vehicles, ships to aero planes.

The LRF-D offers separate long duration measuring rate mode for tracking surveillance reconnaissance; communication with the LRF-D is established by means of a RS422 interface which forms the operational, status and maintenance interface with the LRF-D.

7km tank 20km 20Hz 40mJ Laser Designator Rangefinder Module Features:
1). Diode-Pumped ND:YAG ≥ 40 mJ energy;

2) ≤ 400 μrad beam divergence;

3) Pre-stored coding, internally coded with powerful expansion capacity;

4) Typically designator tank ≥ 5km of 20 Hz;

5). Typically ranging tank ≥7km of 20Hz and up to 11km, max ranging 32km;

6). Accuracy  ≤  +/-2m for target ranges;

7). Good environmental adaptability;

8). Mature advanced technology and miniaturized design, typical weight ≤ 460g

Application:
1). UAV electro-optical platform;

2). Man-portable electro-optical platform;

3). Other electro-optical platforms;

4). Laser guidance;

5). Laser decoy.

7km tank 20km 20Hz 40mJ Laser Designator Rangefinder Module mainly specification:

Question:
1, Why many 20km/30km/40km laser rangefinder can not measure tank 10km in standard 23.5km visibility?

Because their 20km/30km/40km is theory data or high reflection large target in ideal visibility condition, even reflection need beyond 80% and visibility need beyond 50km.

2, Why many NATO target 10% reflection 12km laser rangefinder can not measure tank 10km in standard 23.5km visibility?

Because their 10% reflection is not real performance data, 2.3m x 2.3m NATO target is not real tank, or their NATO target effective size is different; normal the 2.3m x 2.3m target real albedo is 50% or more.

About test land standard, normal big target typical 20km LRF with 25km visibility, then, normal this LRF can measure their 2.3m x 2.3m target about 15km or more, then, real 30% albedo 2.3m x 2.3m target is only about 9km ~ 12km.

Also, starting state and stable state measuring range is different too, such as 15mJ-25mJ LRF, starting state is 25mJ, typical stable state is only 15mJ, only many companies are only said starting state, for example, said single pulse laser energy is at least 25mJ.

3, Why many laser rangefinder do not show measurement rate details?

Because max rate and continuous rate technology demand is different, such as max 12.5Hz 10 sec to 60 sec, maybe then 5Hz is max 1 min to 3 min with cycle.

Also, when rate have more different, such as 1Hz-5Hz, 1Hz-10Hz, 1Hz-20Hz, 5Hz-25Hz etc, then their working distance have more different too.

About 1.5µm eye safe laser rangefinder, if 1Hz is 10km, then, normal 5Hz is only balance about 80%~ 85%, normal 10Hz is only balance about  70%~80%, when this LRF laser energy is very low, then attenuation speed will accelerate.

4, Why normal mid-long range high rate laser rangefinder do not use for Erbium-glass laser?

Because normal Erbium-glass laser energy is too low, high rate continuous measuring time is too short, especially at extreme operating temperatures.

In fact, if Erbium-glass laser want to meet demand, energy need at least 2mJ, normal need 5mJ to 8mJ.

Then, Erbium-glass is not competitive with OPO and Raman shifted.

5, Why many laser rangefinder price is very cheap?

Because performance is different, for example: one LRF is used for bad cable, messy interface, messy wiring etc, then the LRF cost can reduce, even reduce much, but no warranty on performance.

If used for same performance, then our price is very cheap. that is why many laser rangefinder do not show their real main performance data.