The RangePRO Model L-NAV30K laser rangefinder system provides an advanced digital rangefinding capability for military, and specifically for naval, applications.

It is designed to operate as an integral part of a larger system such as weapons fire control, thermal sensing or surveillance and tracking stations. It requires power and control command input, and provides range-to-target and self-diagnostic data output.

The RangePRO L-NAV30k maritime laser rangefinder is a long-range system designed specifically for fixed installation and maritime applications. It can range out to 25km from a large target in standard clear conditions.

The housings are machined from solid aluminium alloy which are then surface treated and epoxy painted to protect against the marine environment and corrosion. The circuit cards are protected with a Mil spec conformal coating, and the system is fully sealed and backfilled with dry air. Attention has been paid to all materials in the construction to maximize reliability and stability.

The system is fitted with an alignment telescope and a red (635nm) pointer laser beam to facility alignment and pointing.

The main feature of the system is the transmitter, a collimated diode pumped laser system with an output at the eye-safe wavelength of 1570nm. The maximum pulse rate is 30Hz which allows rapid ranging from a moving target for tracking applications. The laser exhibits very high reliability and a long life of more than 100 million shots which gives a high Mean Time To Failure (MTTF). The output beam energy can be limited to 8mJ which satisfies the stringent safety Class 1M of the standard IEC825 and has a Nominal Ocular Hazard Distance (NOHD) of less than zero. Higher energy output can be used with a NOHD still less than zero but it is not classified as Class1. An NOHD less than zero means that the eye will not suffer permanent damage even if the laser pulse strikes the eye at zero range.

The receiver has a large aperture for high sensitivity to the return signal and the detector is an InGaAs photodiode.

The system employs advanced digital signal processing technology to provide accurate, reliable ranging with true multiple-target detection capability. All the return signals from the time of firing are digitised and all multiple returns are detected and stored. These signals are interrogated for determination of real target returns, which are then further processed to determine ranges.

All signal and range computation is done "on the fly". Using this philosophy, the only task remaining after the sampling has expired is to transfer the range data through the serial port. Effectively the speed of the signal processing is limited only by the data output rate.

DPL Rangefinders available in optional colors:

• Olive Drab
• Bronze Green
• Silver Grey
• Light Grey
• Window Grey (Standard Color)
• Black