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In 2022, II-VI acquired laser manufacturer Coherent, Inc.. [14] and took the name Coherent Corp. Carl Johnson served as II-VI's first CEO from 1985 to 2007. He stepped down as CEO in 2007 and was named chairman of the board, a position he held until 2014. [15] Johnson was succeeded as CEO by Francis Kramer, who had been president since 1985. [13]
It went public in 1970. Over time, Coherent acquired other laser businesses and expanded to lasers for different industries and applications. From 2004 to 2021, it grew from $400 million to almost $2 billion in revenues, in part through a series of acquisitions. In 2022, II-VI Incorporated acquired Coherent, Inc. and took the name Coherent Corp ...
The skin is usually much less sensitive to laser light than the eye, but excessive exposure to ultraviolet light from any source (laser or non-laser) can cause short- and long-term effects similar to sunburn, while visible and infrared wavelengths are mainly harmful due to thermal damage. [1]
II-VI may refer to: II-VI Incorporated, a manufacturer of optical materials and semiconductors; II-VI semiconductor compound, a material composed of a metal from ...
Quantum well infrared photodetectors (QWIP), manufactured from III–V semiconductor materials such as GaAs and AlGaAs, are another possible alternative, although their theoretical performance limits are inferior to HgCdTe arrays at comparable temperatures and they require the use of complicated reflection/diffraction gratings to overcome ...
After World War II, Vladimir K. Zworykin developed the first practical commercial night-vision device at Radio Corporation of America, intended for civilian use. Zworykin's idea came from a former radio-guided missile. [15] At that time, infrared was commonly called black light, a term later restricted to ultraviolet. Zworykin's invention was ...
"The potential dangers of using at-home LED masks include headaches, eye strain, sleep disturbances, insomnia and mild visual side effects," she explained.
Infrared vision is the capability of biological or artificial systems to detect infrared radiation. The terms thermal vision and thermal imaging [ 1 ] [ 2 ] are also commonly used in this context since infrared emissions from a body are directly related to their temperature: hotter objects emit more energy in the infrared spectrum than colder ones.
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