Light Modulation Experiment of Xe Atoms with Laser Light. I. Theoretical Analysis

1978 ◽  
Vol 45 (2) ◽  
pp. 586-594 ◽  
Author(s):  
Tadao Mochizuki ◽  
Koichi Shimoda
Keyword(s):  
Theoretical Analysis ◽  
Laser Light ◽  
Light Modulation

Absorbing Multilayers And Their Application For Laser Light Modulation

1985 ◽  
Author(s):  
Georgy D. Zartov ◽  
Rumiana A. Peyeva ◽  
Krassimir P. Panajotov
Keyword(s):  
Laser Light ◽  
Light Modulation

Non-Contact Speed Measurement—a Comparison of Optical Systems

1973 ◽  
Vol 6 (7) ◽  
pp. 293-300 ◽  
Author(s):  
R. Fritsche ◽  
F. Mesch
Keyword(s):  
Theoretical Analysis ◽  
Laser Light ◽  
Near Field ◽  
Systematic Errors ◽  
Optical Methods ◽  
Optical Systems ◽  
Incoherent Light ◽  
Spatial Filters ◽  
Moving Surface ◽  
Speed Measurement

Four different optical methods of speed measurement for moving surfaces are considered, two using incoherent light and two using coherent laser light. These systems are described as spatial filters acting on the Wiener spectrum of the moving surface. For this purpose, the Wiener spectrum of the speckling image of a coherently illuminated, moving surface is derived in the near field Fresnel region. Based on the theoretical analysis, the four systems are compared considering systematic errors and the bandwidth of output signals.

Novel Resonant Structures for Laser Light Modulation

1996 ◽  
Vol 7 (12) ◽  
pp. 31
Author(s):  
A. Sharon ◽  
D. Rosenblatt ◽  
A. A. Friesem
Keyword(s):  
Laser Light ◽  
Light Modulation ◽  
Resonant Structures

The measurement of velocity by applying schlieren-interferometry to Doppler-shifted laser light

1969 ◽  
Vol 311 (1506) ◽  
pp. 469-476 ◽  
Keyword(s):  
Theoretical Analysis ◽  
Speed Of Sound ◽  
Doppler Shift ◽  
Laser Light ◽  
Beat Frequency ◽  
Pressure Waves ◽  
Phase Object ◽  
Moving Grids ◽  
Interference Fringes

A method is developed in which light from a laser, after being reflected, refracted, or diffracted in one selected direction by any moving solid or phase object (including particles, flames or pressure waves) is isolated by a ‘schlieren aperture’ and then allowed to interfere with an unperturbed beam. The Doppler shift in wavelength manifests itself as a beat frequency which is related theoretically to the passage of interference fringes past a small photodetector. The theoretical analysis examines various practical limitations and suggests experimental refinements. The method has been applied to moving grids, ultrasonics, flames and particles at velocities ranging from a few centimetres per second to the speed of sound.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Chronic Laser Exposure Effects on Rabbit Retina

1972 ◽  
Vol 30 ◽  
pp. 54-55
Author(s):  
Burton B. Silver ◽  
Theodore Lawwill
Keyword(s):  
Laser Irradiation ◽  
Laser Light ◽  
Broad Band ◽  
Argon Laser ◽  
Atropine Sulfate ◽  
Ultrastructural Changes ◽  
Laser Exposure ◽  
Rabbit Retina ◽  
Histological Changes ◽  
Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

Estimation of the noise in TEM image recorded on “imaging plate”

1987 ◽  
Vol 45 ◽  
pp. 748-749
Author(s):  
T. Oikawa ◽  
N. Mori ◽  
T. Katoh ◽  
Y. Harada ◽  
J. Miyahara ◽  
...  
Keyword(s):  
Low Dose ◽  
Quantum Noise ◽  
Laser Light ◽  
Imaging Plate ◽  
Total System ◽  
Electron Dose ◽  
X Ray ◽  
Image Recording ◽  
Recording Material ◽  
Highly Sensitive

The “Imaging Plate”(IP) is a highly sensitive image recording plate for X-ray radiography. It has been ascertained that the IP has superior properties and high practicability as an image recording material in a TEM. The sensitivity, one of the properties, is about 3 orders higher than that of conventional photo film. The IP is expected to be applied to low dose techniques. In this paper, an estimation of the quantum noise on the TEM image which appears in case of low electron dose on the IP is reported.In this experiment, the JEM-2000FX TEM and an IP having the same size as photo film were used.Figure 1 shows the schematic diagram of the total system including the TEM used in this experiment. In the reader, He-Ne laser light is scanned across the IP, then blue light is emitted from the IP.

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