Distribution of optical intensity relative variance in laser beam profile

2010 ◽  
Author(s):  
Lucie Dordova ◽  
Otakar Wilfert
Keyword(s):  
Laser Beam ◽  
Beam Profile ◽  
Optical Intensity ◽  
Relative Variance ◽  
Laser Beam Profile

Study of optimal laser beam profile for laser induced thermal printing of organic film

2009 ◽  
Author(s):  
Jonghoon Yi ◽  
Kangin Lee ◽  
Kwangwon Lee ◽  
Lee Soon Park ◽  
Jin Hyuk Kwon
Keyword(s):  
Laser Beam ◽  
Beam Profile ◽  
Organic Film ◽  
Laser Beam Profile

scholarly journals INFLUENCE OF LASER BEAM PROFILE ON LIGHT SCATTERING BY HUMAN SKIN DURING PHOTOMETRY BY ELLIPSOIDAL REFLECTORS

2018 ◽  
Vol 9 (1) ◽  
pp. 56-65 ◽  
Author(s):  
M. A. Bezuglyi ◽  
N. V. Bezuglaya ◽  
S. Kostuk
Keyword(s):  
Monte Carlo Simulation ◽  
Adipose Tissue ◽  
Laser Beam ◽  
Human Skin ◽  
Cross Section ◽  
Beam Profile ◽  
Laser Beam Profile ◽  
Reflected Light ◽  
Section Profile ◽  
Cross Section Profile

The correct accounting of laser emitter parameters for improvement of diagnostic authenticity of methods of optical biomedical diagnostic is important problem for applied biophotonic tasks. The purpose of the current research is estimation of influence of energy distribution profile in transversal section of laser beam on light scattering by human skin layers at photometry by ellipsoidal reflectors.Biomedical photometer with ellipsoidal reflectors for investigation of biological tissue specimens in transmitted and reflected light uses laser probing radiation with infinitely thin, Gauss-type and uniform cross-section profile. Distribution of beams with denoted profiles, which consist of 20 million photons with wavelength 632.8 nm, was modeled by using of Monte-Carlo simulation in human skin layers (corneous layer, epidermis, derma and adipose tissue) of various anatomic thickness and with ellipsoidal reflectors with focal parameter equal to 16.875 mm and eccentricity of 0.66.The modeling results represent that illuminance distribution in zones of photometric imaging is significantly influenced by the laser beam cross-section profile for various thickness of corneous layer and epidermis in transmitted and reflected light, and also derma in reflected light. Illuminance distribution for adipose tissue in reflected and transmitted light, and also derma in transmitted light, practically do not depend of laser beam profile for anatomic thicknesses, which are appropriate for human skin on various sections of body.There are represented results of modified Monte-Carlo simulation method for biomedical photometer with ellipsoidal reflectors during biometry of human skin layers. For highly scattered corneous layer and epidermis the illumination of middle and external rings of photometric images changes depending from the laser beam profile for more than 50 % in transmitted and 30 % in reflected light. For weakly scattering skin layers (derma and adipose layer) the influence of profile can be observed only for derma in reflected layer and is equal not more than 15 %. 

Detector Array for Measuring Temporal-Spatial Distribution of High-Repetition-Rate Pulsed Laser Beam Profile

2013 ◽  
Vol 40 (6) ◽  
pp. 0608003
Author(s):  
冯国斌 Feng Guobin ◽  
王振宝 Wang Zhenbao ◽  
冯刚 Feng Gang ◽  
杨鹏翎 Yang Pengling ◽  
王群书 Wang Qunshu ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Laser Beam ◽  
Repetition Rate ◽  
Pulsed Laser ◽  
High Repetition Rate ◽  
Beam Profile ◽  
Detector Array ◽  
Laser Beam Profile ◽  
High Repetition ◽  
Pulsed Laser Beam

Laser beam profile shaping for improved magneto-optical recording

1997 ◽  
Vol 33 (15) ◽  
pp. 1320 ◽  
Author(s):  
M.K. Loze ◽  
C.D. Wright
Keyword(s):  
Laser Beam ◽  
Beam Profile ◽  
Optical Recording ◽  
Laser Beam Profile

Fabrication of a thermally actuated tunable grating and its application as a CO_2 laser beam profile analyzer

2008 ◽  
Vol 47 (28) ◽  
pp. 5175 ◽  
Author(s):  
Mohammadreza Riahi ◽  
Hamid Latifi ◽  
Ghazaleh Moghimislam
Keyword(s):  
Laser Beam ◽  
Beam Profile ◽  
Laser Beam Profile ◽  
Thermally Actuated
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