Light Propagation in Transparent Wood: Efficient Ray‐Tracing Simulation and Retrieving an Effective Refractive Index of Wood Scaffold

2021 ◽  
pp. 2100135
Author(s):  
Jiu Pang ◽  
Adil Baitenov ◽  
Céline Montanari ◽  
Archana Samanta ◽  
Lars Berglund ◽  
...  
Keyword(s):  
Refractive Index ◽  
Ray Tracing ◽  
Effective Refractive Index ◽  
Light Propagation ◽  
Ray Tracing Simulation

Large area light propagation in quasi-zero average refractive index materials

2009 ◽  
Vol 1182 ◽  
Author(s):  
Principia Dardano ◽  
Vito Mocella ◽  
Stefano Cabrini ◽  
Allan S. Chang ◽  
Luigi Moretti ◽  
...  
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Effective Refractive Index ◽  
Light Propagation ◽  
Near Infrared ◽  
Experimental Results ◽  
Infrared Light ◽  
Large Area ◽  
Near Infrared Light ◽  
Average Refractive Index

AbstractIn this paper the experimental results show near-infrared light collimation through large area (2 x 2 mm) nanopatterned material with refractive index quasi-zero on the average. This quasi-zero refractive index is obtained alternating photonic crystals strips with effective refractive index neff = –1 and air strips (n = 1). Layers optically annihilate each other, verifying the optical antimatter concept theoretically proposed by Pendry et al [J. Phys.: Condens. Matter 15, 6345 (2003)].

scholarly journals Investigating Intense Rainfall Influence on Distance Measurement with a Time-of-Flight Camera Sensor Using Optical Ray-Tracing Simulation Technique

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1056
Author(s):  
Marcus Baumgart ◽  
Norbert Druml ◽  
Markus Dielacher ◽  
Cristina Consani
Keyword(s):  
Ray Tracing ◽  
Time Of Flight ◽  
Autonomous Driving ◽  
Intense Rainfall ◽  
Signal Suppression ◽  
Tof Camera ◽  
Ray Tracing Simulation ◽  
Camera Sensors ◽  
Optical Ray Tracing ◽  
Rain Effect

Robust, fast and reliable examination of the surroundings is essential for further advancements in autonomous driving and robotics. Time-of-Flight (ToF) camera sensors are a key technology to measure surrounding objects and their distances on a pixel basis in real-time. Environmental effects, like rain in front of the sensor, can influence the distance accuracy of the sensor. Here we use an optical ray-tracing based procedure to examine the rain effect on the ToF image. Simulation results are presented for experimental rain droplet distributions, characteristic of intense rainfall at rates of 25 mm/h and 100 mm/h. The ray-tracing based simulation data and results serve as an input for developing and testing rain signal suppression strategies.

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