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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...
A ring laser gyroscope ( RLG) consists of a ring laser having two independent counter-propagating resonant modes over the same path; the difference in phase is used to detect rotation. It operates on the principle of the Sagnac effect which shifts the nulls of the internal standing wave pattern in response to angular rotation.
The Plymouth Laser is a two-door 2+2 sports coupe sold by Plymouth from 1989 until 1994. The Laser and its siblings, the Mitsubishi Eclipse and Eagle Talon, were the first vehicles produced under the newly formed Diamond-Star Motors, a joint-venture between the Chrysler Corporation and the Mitsubishi Motors Corporation .
The United States expressed deep concern to Israel's government over an airstrike in Rafah and urged an investigation as soon as it saw reports of the incident, the State Department said on ...
A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. While all laser gain media allow small shifts in output wavelength, only a few types of lasers allow continuous tuning over a significant wavelength range. There are many types and categories of tunable lasers. They exist in the gas, liquid, and ...
Coherent anti-Stokes Raman spectroscopy, also called Coherent anti-Stokes Raman scattering spectroscopy ( CARS ), is a form of spectroscopy used primarily in chemistry, physics and related fields. It is sensitive to the same vibrational signatures of molecules as seen in Raman spectroscopy, typically the nuclear vibrations of chemical bonds.
Mario Andretti, the former Formula 1 champion whose son Michael is pushing to expand the grid, had a contentious run-in with Greg Maffei, the CEO of Formula 1's parent company Liberty Media ...
Ford Laser. The Ford Laser is a compact car, originally a subcompact car in the first three generations, which was sold by Ford in Asia, Oceania, and parts of South America and Africa. It has generally been available as a sedan or hatchback, although convertible, wagon and pick-up versions have also been available in different markets.
Ultrafast laser spectroscopy is a category of spectroscopic techniques using ultrashort pulse lasers for the study of dynamics on extremely short time scales ( attoseconds to nanoseconds ). Different methods are used to examine the dynamics of charge carriers, atoms, and molecules. Many different procedures have been developed spanning ...