optical sensors/ TOF lidarimaging distance measurementstime-of-flight-based imaging lidartime-to-digital converterparallel time-interval measurementssensor breadboardsensor performancespace applicationsThis paper presents a new time-of-flight-based imaging lidar for measurements in the 5-100 m range. The ...
Both stereo vision and laser triangulation or structured light techniques take measurements in the spatial domain. Time-of-flight (ToF) and lidar - light detection and ranging - are based in the time domain. Time-of-flight sensors emit a light pulse, often in the infrared. Objects in the fi...
(c) shows the reconstructed data cubes. One can see that high-frequency textures that are well visible in the CCD image but not in the SPAD measurements have been transferred into the light-in-flight image. Surfaces are much smoother, less noisy, and sharpened...
Time of flight, lidar, and ladar. Time-of- flight (TOF) imaging does not explicitly start with 2D data, but rather uses specialized imaging sensors and/or camera processing to calculate a distance for each pixel by timing pulsed or phase-modulated light reflections. Lidar (light detection and...
The λ = 1550 nm measurements were obtained using the bistatic depth imaging system at a stand-off distance of 50 m. Full size image Estimation of attenuation The number of attenuation lengths between the system and the target at the operating wavelength of 1550 nm was calculated from the...
ToF imaging is generally a photonic approach, which is realized by using the THz-TDS system. Pico-second THz pulses can be measured accurately by using the femtosecond laser pulse as the probe. The distance can be obtained by multiplying the traveling time of echoes and the speed of light. ...
Laser triangulation technology is applied with a laser that projects light onto a target. The distance is measured based on a calculation of the angle of the returned light. Laser triangulation is beneficial, for example, in smart manufacturing applications that require exact short-range measurements...
2(c). At first glance, it may appear that such asynchronous measurements may not provide consistent depth infor- mation. The main idea lies in computationally re- synchronizing the photon timing measurements with the laser cycles. To this end, we develop a generalized image formation model and ...
By recording fields at many regularly spaced wavelengths, we can computationally engineer a pulsed light source, much like those found in transient imaging, but using continuous wave measurements. The difference to transient ToF approaches is that our detection procedure allows for much better ...
The grey regions indicate the edge of the gauge blocks, where TOF has ambiguity due to reflections from two surfaces. The step height (between points I and II) is determined to be 300.029 μm with repeatability (the standard deviation value of 100 consecutive measurements at 100-μs ...