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The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s.
From 1981 to 1992 Baer was at Spectra-Physics, Inc. where he held positions of vice-president of research and senior research fellow. While at Spectra-Physics he developed technology that formed the basis for major Spectra-Physics product lines including optical pulse compressors, diode-pumped solid-state lasers, and modelocked Ti:Sapphire ...
In 1996, PSC acquired Spectra-Physics Scanning Systems, Inc., and also acquired Percon Inc., a manufacturer of portable data terminals. In 2002, PSC went through bankruptcy reorganization. Littlejohn & Co. , a private equity firm, purchased all of the company's senior and subordinated debt of $124 million. [ 1 ]
Helium–neon laser at the University of Chemnitz, Germany. A helium–neon laser or He–Ne laser is a type of gas laser whose high energetic gain medium consists of a mixture of helium and neon (ratio between 5:1 and 20:1) at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge.
The excitation wavelength is blinded by the pump laser and cut out. The rest of the spectra usually have a few bands such as ground-state absorption, excited-state absorption, and stimulated emission. Under normal conditions, the angles of the emission are randomly orientated and not detected in the absorption geometry.
Discrete spectra are seen in many other phenomena, such as vibrating strings, microwaves in a metal cavity, sound waves in a pulsating star, and resonances in high-energy particle physics. The general phenomenon of discrete spectra in physical systems can be mathematically modeled with tools of functional analysis , specifically by the ...
Angle-resolved photoemission spectroscopy (ARPES) is an experimental technique used in condensed matter physics to probe the allowed energies and momenta of the electrons in a material, usually a crystalline solid. It is based on the photoelectric effect, in which an incoming photon of sufficient energy ejects an electron from the surface of a ...
Richard H. Price (born March 1, 1943) is an American physicist specializing in general relativity. Price graduated from Stuyvesant High School in 1960, and went on to earn a dual degree in physics and engineering from Cornell University in 1965.