Tag Archives: eye-safe

Eye-safe laser illuminators for long-reach LIDAR and gated imaging in harsh weather conditions

March 5, 2021 by Modulight Content
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Published in: SPIE LASE 2021 Authors: Lasse Orsila, Visa Kaivosoja, Petri Melanen, Petteri Uusimaa  Published in: SPIE LASE 2021 Authors: Lasse Orsila, Visa Kaivosoja, Petri Melanen, Petteri Uusimaa Autonomous driving and automated ships are in increasing demand and the performance for pattern recognition and safety functions are essential. Harsh weather conditions lower the atmospheric transmission for useable eye-safe wavelengths and water vapor peaks prevent most laser light propagation for longer distances. In LIDAR application this problem can be solved with increased peak power. However, high peak power solutions with high repetition rate do not exist or they are bulky and Continue reading →

Long-range all-solid-state flash LiDAR sensor for autonomous driving

March 5, 2021 by Modulight Content
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Published in: SPIE LASE 2021 Authors: Juha Lemmetti, Niklas Sorri, Ilkka Kallioniemi, Petri Melanen, Petteri Uusimaa  Published in: SPIE LASE 2021 Authors: Juha Lemmetti, Niklas Sorri, Ilkka Kallioniemi, Petri Melanen, Petteri Uusimaa LiDAR sensors have gathered lot of interest in the field of autonomous driving. Still, the offering of mass-produced, small form-factor all-solid-state LiDAR sensors remain scarce. Furthermore, most of the sensor applications are currently designed for short-range (<50 feet) and medium-range (50-300 feet) applications. There’s a requirement for an efficient solution for long range LiDAR sensor that can be used to monitor the road in front of the vehicle. It must Continue reading →

Range Finding

April 11, 2006 by Modulight Content
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    Laser range finding applications set several requirements for the laser device. High output power is required at the same time in very short pulses of even picosecond range. However, the required power is defined by the distance and reflectivity of the target. High power can be achieved by constructing several emitter stacks or by increasing a single emitter dimensions. Light pulses up to 120-150 Watts can be generated using Modulight’s laser diodes at 905 nm wavelength range. Though comparably lower output power with Continue reading →Laser range finding: How it works? Pulsed laser range finder is based on measuring the difference in properties of the transmitted and back-reflected light from the target. The target changes the properties of the incident light and the back-reflected light is analyzed in the receiving equipment. Modulight manu­factures range-finding lasers for various market segments. The distance measurement techniques are required in determining the height, width, distance, volume or movement of the target.  Applications for the technique are laser radar speed measurements, traffic safety, laser profiling Continue reading →