He-Ne Laser Light Induced Changes in the State of Chromatin in Human Cells

1999 ◽  
Vol 86 (9) ◽  
pp. 452-453 ◽  
Author(s):  
Yury G. Shckorbatov
Keyword(s):  
Laser Light ◽  
Human Cells ◽  
The State ◽  
Induced Changes

Ruby Laser Induced Changes in the Absorption Spectra of Sodium Decorated Sodium Chloride Crystals

1970 ◽  
Vol 25 (2) ◽  
pp. 229-236
Author(s):  
H. Kuzmany
Keyword(s):  
Absorption Spectra ◽  
Ruby Laser ◽  
Laser Light ◽  
Temperature Treatment ◽  
Laser Wavelength ◽  
Beam Path ◽  
General Increase ◽  
Annealing Conditions ◽  
Different Depths ◽  
Induced Changes

Abstract The effects of intense Q-switched ruby laser light on the absorption spectra of NaCl crystals, additively coloured by colloidal sodium were investigated at different depths along the laser beam path as well as after being subjected to different annealing conditions. A strong general increase in absorption was observed in the region where the laser light entered the crystal, while a strong decrease in absorption occurred in the colloid band, especially around the laser wavelength. This bleaching was accompanied by the generation of a new absorption band at ~ 1200 nm (~1.0eV) in the infrared, which, according to its sensitivty to temperature treatment, is not of colloidal origin, The energy denisty necessary for its generation was found to be about 400mJ/cm2. Its is suggested that the bleaching of the colloid band could be used for the storage of holograms.

Development of Laser Dresser for Resin Bonded Diamond Wheel

2007 ◽  
Vol 329 ◽  
pp. 169-174 ◽  
Author(s):  
Hiroshi Matsuura ◽  
Kazuhiro Hane ◽  
Yasuhiro Kunieda ◽  
Nobuhito Yoshihara ◽  
Ji Wang Yan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Laser Light ◽  
Laser Energy ◽  
Uv Light ◽  
Mechanical Damage ◽  
Diamond Wheel ◽  
The State ◽  
Uv Laser ◽  
Wheel Surface ◽  
Core Diameter

The state of the wheel surface after dressing is important for processing of a surface to the nano-order level. A laser dresser was developed using ultraviolet (UV) laser light, which imparts no mechanical damage to the resin bond. One feature of this system is that UV laser energy is transmitted by a special optical fiber for UV light, and is transmitted only to the resin bond. Using this newly developed laser dresser, it was possible to ablate the resin bond to a depth of over 2 microns using a fiber with a core diameter of 200 microns.

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