Physical and Mathematical Considerations About Laser Perimetry

1974 ◽  
Vol 23 (S1) ◽  
pp. 349-351 ◽  
Author(s):  
L. Favella ◽  
L. Liuzzi ◽  
F. Bartoli
Keyword(s):  
White Light ◽  
Laser Light ◽  
Monochromatic Light ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon ◽  
Mathematical Characteristics

The physical and mathematical characteristics of white light, monochromatic light, and laser light, are discussed with reference to the advantages offered by perimetry using a red helium-neon laser.

Photographing helium–neon laser light

1992 ◽  
Vol 60 (6) ◽  
pp. 571-571 ◽  
Author(s):  
John R. de Bruyn ◽  
R. Bradley
Keyword(s):  
Laser Light ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon

scholarly journals Application of laser treatment for internal diseases

2001 ◽  
Vol 82 (5) ◽  
pp. 369-372
Author(s):  
N. B. Amirov
Keyword(s):  
Energy Intensity ◽  
Light Guide ◽  
Laser Light ◽  
Natural Conditions ◽  
Neon Laser ◽  
Artificial Stimulus ◽  
Helium Neon Laser ◽  
Significant Damage ◽  
Living Tissues ◽  
Helium Neon

In the early 60's, the first studies of laser radiation (LR) interaction with biological objects were carried out. Experiments showed that laser beam due to monochromaticity and coherence has a high power density, allowing selective thermal effect on living tissues without significant damage to adjacent tissues. Since the 70s, LR has significantly expanded its applicability and has been successfully introduced in the clinic of internal diseases. In the early 80's the first intravascular irradiation of blood with helium-neon laser (HNL) using a light guide was carried out. This method has found wide application. For any organism laser light is an unfamiliar artificial stimulus, not found in natural conditions. The main features of LR are high directionality, monochromaticity and energy intensity.

scholarly journals Impact of coherent light on interaction of fungi and bacteria cells cultivated in vitro

2020 ◽  
Vol 23 ◽  
pp. 02001
Author(s):  
Andrey V. Budagovsky ◽  
Marina V. Maslova ◽  
Olga. N. Budagovskaya ◽  
Ekaterina V. Grosheva
Keyword(s):  
Pseudomonas Syringae ◽  
Monochromatic Light ◽  
Spatial Coherence ◽  
Pathogenic Fungi ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Light Filters ◽  
Spatio Temporal ◽  
Helium Neon

This article considers impact of coherent red quasi-monochromatic light on interaction of colonies of the Pseudomonas syringae bacteria and the Fusarium macroceras fungus in an in vitro culture. A helium-neon laser and a heat source with a system of light filters and aperture diaphragms were used for irradiation. Two light fluxes were obtained with energy parameters close in magnitude, but significantly different in spatio-temporal coherence. Light with a high statistical ordering stimulated growth of both colonies. Irradiation from the same spectral range and intensity, but with low spatial coherence, increased the functional activity of only small bacteria cells. As a result, there was a suppression of larger fungal cells development that were interacting with them. Therefore, it was the statistical (coherent) properties of light that affected the change in the equilibrium of microorganisms in an artificial biocenosis. This approach can be used in practice for increasing the activity of bacteria antagonists of pathogenic fungi and the non-chemical disease protection of plants.

Plant Mitochondria are Sensitive to Helium-Neon Laser Light

1995 ◽  
Vol 129 (4) ◽  
pp. 1075-1076
Author(s):  
D. Pastore ◽  
C. di Martino ◽  
G. Bosco ◽  
S. Passarella
Keyword(s):  
Laser Light ◽  
Plant Mitochondria ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon

Erythrocyte distribution profiles during sedimentation as determined by helium-neon laser light

1980 ◽  
Vol 18 (4) ◽  
pp. 391-395 ◽  
Author(s):  
M. Singh ◽  
A. Meyyappan ◽  
N. Ramachandran ◽  
B. M. Sivaram
Keyword(s):  
Laser Light ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon

Ultrathin Slices of Ferroelectric Domain-Patterned Lithium Niobate by Crystal Ion Slicing

2001 ◽  
Vol 681 ◽  
Author(s):  
David A. Scrymgeour ◽  
Venkat Gopalan ◽  
Tony E. Haynes ◽  
Miguel Levy
Keyword(s):  
Laser Light ◽  
Ferroelectric Domain ◽  
Damage Layer ◽  
Annealing Conditions ◽  
Neon Laser ◽  
Electro Optic ◽  
Helium Neon Laser ◽  
Ferroelectric Domains ◽  
Crystal Ion Slicing ◽  
Helium Neon

ABSTRACTWe report the successful fabrication of 6 µm thick slices from a ferroelectric domain micro-engineered LiNbO3 wafer device using the crystal ion slicing technique. The device was created by micropatterning ferroelectric domains in a bulk 0.3 mm thick wafer of z-cut LiNbO3, followed by ion-implanting with 3.8 MeV He+ ions to a fluence 5 × 10+16 ions/cm2 to create a damage layer at a well defined depth from the surface. Etching away this damaged layer in dilute hydrofluoric acid results in a liftoff of the top slice in which the ferroelectric domain patterns are left intact. The influence of annealing conditions on liftoff time and depth of etch lines was studied. Helium-Neon laser light was successfully coupled into the device. Due to unintentional breakage of the polished input and output faces, the electro-optic scanning performance has not been characterized so far.

Helium-neon laser therapy interferes with epiphyseal plate growth in the femur and tibia of rabbits

2013 ◽  
Vol 2 (4) ◽  
Author(s):  
Flavia de Oliveira ◽  
Maria Stella Peccin ◽  
Kelly Rosseti Fernandes ◽  
Ana Claudia Muniz Renno ◽  
Paulo Ricardo Giusti ◽  
...  
Keyword(s):  
Laser Therapy ◽  
Laser Light ◽  
Negative Control ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Neon Laser ◽  
Level Laser ◽  
Helium Neon Laser ◽  
The Right ◽  
Helium Neon

AbstractThe purpose of this study was to evaluate the influence of low-level laser therapy (LLLT) on epiphyseal cartilage in the femur and tibia of rabbits. A total of six male New Zealand rabbits were used in this study. The right tibia or femur lesions (control group) served as negative control and the left as experimental (laser) group. Helium-neon (HeNe) laser light with an energy density of 6 J/cm

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