Scattering of Ruby-Laser Beam by Gases

1963 ◽  
Vol 11 (9) ◽  
pp. 403-406 ◽  
Author(s):  
T. V. George ◽  
L. Slama ◽  
M. Yokoyama ◽  
L. Goldstein
Keyword(s):  
Laser Beam ◽  
Ruby Laser

Polarization of Ruby Laser Beam

1964 ◽  
Vol 3 (1) ◽  
pp. 60-61 ◽  
Author(s):  
Tokumichi Tamai ◽  
Masayoshi Achiwa
Keyword(s):  
Laser Beam ◽  
Ruby Laser

scholarly journals EFFECT OF THE RUBY LASER MICROBEAM ON MITOCHONDRIA OF KB CELLS SUPRAVITALLY STAINED BY PINACYANOL

1969 ◽  
Vol 41 (2) ◽  
pp. 424-430 ◽  
Author(s):  
Yasukazu Tanaka
Keyword(s):  
Laser Beam ◽  
Ruby Laser ◽  
Focal Length ◽  
Direct Interaction ◽  
Experimental System ◽  
Spot Size ◽  
Kb Cells ◽  
Focal Spot Size ◽  
Laser Microbeam ◽  
Opaque Material

With pinacyanol as the supravital stain, a preferential effect on mitochondria of KB cells was achieved by the irradiation with the ruby laser beam. The observation confirmed the results of other workers using janus green B in the same experimental system. The preferential effect on mitochondria was noted in the area extending 8–10 µ beyond the nonpreferential damage of 4–5 µ in diameter. The opaque material associated with mitochondria possibly represented coagulated protein. The effect involved cristae mitochondriales without severe disarrangement of their structure. The opaque material could be interpreted as the result of direct interaction between mitochondria and the laser beam, even though the mitochondria were noted outside of the previously estimated focal spot size of about 3 µ Within the thickness of 2–4 µ of monolayered cells, larger areas of damage can be accounted for by divergence of the beam which is focused by a microscope objective of very short focal length. A threshold of biologic effectiveness is probably also involved.

Evidence for a Thermonuclear Reaction in aθ-Pinch Plasma from the Scattering of a Ruby Laser Beam

1967 ◽  
Vol 19 (12) ◽  
pp. 688-689 ◽  
Author(s):  
S. A. Ramsden ◽  
P. K. John ◽  
B. Kronast ◽  
R. Benesch
Keyword(s):  
Laser Beam ◽  
Ruby Laser ◽  
Thermonuclear Reaction ◽  
Pinch Plasma

Spatial coherence of a ruby laser beam by interferometry

1978 ◽  
Vol 17 (21) ◽  
pp. 3500 ◽  
Author(s):  
H. Madjidi-Zolbanine
Keyword(s):  
Laser Beam ◽  
Ruby Laser ◽  
Spatial Coherence

Radiation Scattered from the Plasma Produced by a Focused Ruby Laser Beam

1964 ◽  
Vol 13 (7) ◽  
pp. 227-229 ◽  
Author(s):  
S. A. Ramsden ◽  
W. E. R. Davies
Keyword(s):  
Laser Beam ◽  
Ruby Laser

Self-bending of a ruby laser beam in CdSxSe1–xsemiconductor crystals

1975 ◽  
Vol 5 (3) ◽  
pp. 340-342 ◽  
Author(s):  
A A Borshch ◽  
M S Brodin ◽  
V I Volkov ◽  
V V Ovchar
Keyword(s):  
Laser Beam ◽  
Ruby Laser

scholarly journals LASER MICROSCOPE IRRADIATION OF PHYSARUM POLYCEPHALUM: DYNAMIC AND ULTRASTRUCTURAL EFFECTS

1969 ◽  
Vol 40 (1) ◽  
pp. 108-119 ◽  
Author(s):  
Joe L. Griffin ◽  
Marvin N. Stein ◽  
Robert E. Stowell
Keyword(s):  
Electron Microscopy ◽  
Laser Beam ◽  
Incident Energy ◽  
Physarum Polycephalum ◽  
Ruby Laser ◽  
Movement Patterns ◽  
Transient Responses ◽  
Pigment Granules

Streaming plasmodia of Physarum polycephalum were irradiated with a microscope-mounted ruby laser and the resulting changes were recorded by cinemicrography or streak photographs. Some lesions were processed for electron microscopy. By varying the incident energy, three levels of response were detected. Two transient responses, a gelation briefly blocking streams and a more severe gelation with contraction, changed movement patterns but not organelle ultrastructure. At higher energies, a permanently coagulated lesion was rapidly segregated from normal and transiently altered cytoplasm by formation of new membranes. Within the coagulum, pigment granules were destroyed, membranes were disrupted, and cytoplasm was flocculent. Nuclei and mitochondria were compact in the center and swollen in a peripheral space left by contraction of the coagulum. These changes are probably caused by heat produced by the interaction between the laser beam and the pigment granules of the plasmodium. Many of the changes seem to be secondary responses that follow the primary capture of energy during irradiation.

scholarly journals OBSERVATIONS OF RUBY-LASER BEAM-INTENSITY PATTERNS WITH DYE-SENSITIZED PHOTOPOLYMERS

1962 ◽  
Vol 48 (2) ◽  
pp. 303-305 ◽  
Author(s):  
D. A. Buddenhagen ◽  
A. V. Haeff ◽  
G. F. Smith ◽  
G. Oster ◽  
G. K. Oster
Keyword(s):  
Laser Beam ◽  
Ruby Laser ◽  
Beam Intensity ◽  
Laser Beam Intensity ◽  
Dye Sensitized
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