Results 191 to 200 of about 1,989,922 (270)
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Ruby Laser as a Microsurgical Instrument
Science, 1963Morphological changes at the cell level have been produced experimentally by a pulsed ruby laser (optical maser). A pulse duration of approximately 500 microseconds caused discrete damage to structures in the cell without irreversible damage to the surrounding area.
Norman M. Saks, Charles A. Roth
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Transscleral Ruby Laser Cyclocoagulation
American Journal of Ophthalmology, 1984During a ten-year period, we treated 241 eyes by transscleral ruby laser cyclocoagulation. Each eye had a minimum follow-up of six months. The average was 24 months and the range was six to 92 months. Using a criterion for success of intraocular pressure between 5 and 22 mm Hg, we achieved an overall success rate of 62% (150 of 241 eyes).
Joanne M. Waeltermann, Hugh Beckman
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Breakdown of deuterium with a ruby laser
Proceedings of the IEEE, 1971Solving the quantum-kinetic equation for electrons interacting with deuterium molecules and a 1.8-eV photon field, we have made time-dependent calculations of the breakdown of deuterium gas by a ruby laser. We find that the quantum flux G corresponding to the breakdown threshold E field is given by an equation which is approximately of the form ln 44 =
P.E. Nielsen +2 more
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Joulemeter for pulsed ruby laser
Review of Scientific Instruments, 1996This article presents a joulemeter that permits us to measure the beam energy of a pulsed ruby laser from the HLS-3 holographic system at the recording photosensitive surface of the holographic plate. This is an inexpensive alternative to commercially obtainable energy measuring silicon detectors.
D. Depret +3 more
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Ruby laser with an active feedback
Soviet Journal of Quantum Electronics, 1975An investigation was made of the characteristics of the radiation emitted by a ruby laser with an active positive or negative feedback. Under negative feedback conditions the emission was in the form of smooth pulses modulated by not more than 10% (rms deviation not exceeding 5%) and with an instantaneous width of the spectrum of 0.0008 nm.
V I Serdyukov, M M Makogon
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Perfection of Ruby Laser Crystals
Journal of Applied Physics, 1965Ruby laser crystals grown by three different methods have been examined by x-ray topography and double-crystal rocking curves. Flame-fusion grown material is the least perfect. It usually has a few zones per centimeter that are tilted from the general matrix by 1 to 2 min of arc; the angular range of misorientation within the matrix is about 20 to 30 ...
L. S. Birks, W. E. Sweeney, J. W. Hurley
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On the Efficiency of Ruby Laser Pumping
IETE Journal of Research, 1970The paper deals with the efficiency considerations of optical pumping in ruby laser in general and that of ruby rod in particular. The absorption of the incident light in ruby depends upon the path length and the frequency of incident light. Based on both these aspects, the efficiency has been calculated for different cross-sections of the rod.
N. K. D. Choudhury +2 more
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Optical Engineering, 1978
In the course of developing a portable holo-camera for field use, a small battery powered ruby laser, based on an electronic flash unit, was built. In this letter we describe the laser in sufficient detail to allow others to build one for themselves.
E. V. Allen, B. P. Hildebrand
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In the course of developing a portable holo-camera for field use, a small battery powered ruby laser, based on an electronic flash unit, was built. In this letter we describe the laser in sufficient detail to allow others to build one for themselves.
E. V. Allen, B. P. Hildebrand
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IETE Journal of Research, 1968
ABSTRACTA power supply for a pulsed ruby laser incorporating facilities for variable output, control circuit for automatic cut out of input supply when condensers are fully charged, and automatic/manual triggering is described. It has been successfully used to lase a ruby system at an input of 800J at 3 kV.
N. Mansharamani +2 more
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ABSTRACTA power supply for a pulsed ruby laser incorporating facilities for variable output, control circuit for automatic cut out of input supply when condensers are fully charged, and automatic/manual triggering is described. It has been successfully used to lase a ruby system at an input of 800J at 3 kV.
N. Mansharamani +2 more
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Archives of Dermatology, 1999
OBJECTIVE To evaluate histologically the long- and short-term changes associated with cosmetic improvement or failure of normal-mode ruby laser treatment of patients with congenital nevi. DESIGN A biopsy of the laser-treated lesions of 10 patients with
Shuhei Imayama, S. Ueda
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OBJECTIVE To evaluate histologically the long- and short-term changes associated with cosmetic improvement or failure of normal-mode ruby laser treatment of patients with congenital nevi. DESIGN A biopsy of the laser-treated lesions of 10 patients with
Shuhei Imayama, S. Ueda
semanticscholar +1 more source