Patent
Velocimeter, displacement meter, vibrometer and electronic device
TLDR
In this paper, a velocimeter is provided to detect the moving speed of a measuring object highly precisely, and a signal processing circuit part calculates the frequency shift quantity of the scattered light based on output from the photodiode.Abstract:
A first luminous flux emitted from the front end face of a LD is reflected by a mirror to be made incident on a detection point on the surface of a measuring object, and a second luminous flux emitted from the rear end face of the LD is reflected by another mirror to be made incident on the detection point. Scattered light from the first detection point is received in a photodiode. A signal processing circuit part calculates the frequency shift quantity of the scattered light based on output from the photodiode. As a result, a velocimeter is provided which detects the moving speed of a measuring object highly precisely.read more
Citations
More filters
Patent
System and method for generating three dimensional images using lidar and video measurements
TL;DR: In this paper, a system uses range and Doppler velocity measurements from a lidar system and images from a video system to estimate a six degree-of-freedom trajectory of a target.
Patent
Chirped coherent laser radar system and method
TL;DR: In this paper, a collocated laser beam is used to unambiguously detect a range of a target and a range rate at which the target is moving relative to the laser radar system.
Patent
System and method for remotely monitoring physiological functions
TL;DR: In this paper, a system and method for remotely monitoring an individual, in accordance with some embodiments of the invention, is presented, in which one or more physiological functions and/or physical activities of the individual may be monitored.
Patent
Optical movement information detector, movement information detection system, electronic equipment and encoder
TL;DR: In this paper, two different phase components obtained by splitting interference light of light from an object by diffraction grating are guided to first and second PD's by a second optical system.
Patent
Material measurement system for obtaining coincident properties and related method
TL;DR: In this paper, a material measurement system (500) includes a THz generator including at least one laser source (111) for emitting optical pulses, the optical pulses coupled to a THZ emitter (51) operable for emitting pulsed THz radiation at a sample location on material (14) while being processed by a manufacturing system (100).
References
More filters
Patent
Displacement information detecting apparatus
TL;DR: In this article, a displacement information detection system was proposed, which has a light generation unit, a first unit including a first grating for displacement information, and one or a plurality of lens members for original detection.
Patent
Laser doppler velocimeter
TL;DR: In this article, reflections from a laser beam directed at a moving surface are passed through spatial filters, combined by a beam splitter, and focussed on an observation plane of a photodetector to provide a fringe pattern having an amplitude variation frequency responsive to the velocity of the moving surface.
Patent
Optical device and displacement information measurement apparatus using the same
TL;DR: In this article, an optical device having an electrooptic crystal on which a light beam is to be incident is disclosed, and electrodes for applying a predetermined voltage to the electrodes are disposed in an optical system in which the angles of light rays in the light beam temporally or spatially change.
Patent
Laser doppler speedometer
Doi Takeshi,Hidejiro Kadowaki,Takahashi Yoshihiko,Makoto Takamiya,Masafumi Wataya,Yamamoto Tsunesuke,Toshiyuki Yanaka +6 more
TL;DR: In this paper, the authors proposed a method to detect the speed of a moving body or a moving fluid accurately even if the wavelength of laser light is fluctuated by changing the incident angle of the laser light with respect to the moving body and the moving fluid.
Patent
Optical displacement detecting device
Takumi Fukuda,Takagi Masaaki +1 more
TL;DR: In this paper, an optical displacement detecting device is constituted of a light source unit 11 emitting the coherent light 6, an interference optical system unit 2 generating interference fringes 1, a moving body formed with a space lattice 4 and displaced to cross the interferences 1, and a light receiving unit 5 receiving the interference fringe 1 via the space lattices 4 and detecting the displacement of the moving body 3.