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The Spectronic 20 is a brand of single-beam spectrophotometer, designed to operate in the visible spectrum [1] across a wavelength range of 340 nm to 950 nm, with a spectral bandpass of 20 nm. [2] [3] It is designed for quantitative absorption measurement at single wavelengths. [1] Because it measures the transmittance or absorption of visible ...
Bausch & Lomb (since 2010 stylized as Bausch + Lomb [2]) is an American-Canadian eye health products company based in Vaughan, Ontario, Canada. It is one of the world's largest suppliers of contact lenses, [3] lens care products, pharmaceuticals, intraocular lenses, and other eye surgery products. [4] [5] The company was founded in Rochester ...
U.S. patent 211,507 – Improvement in Microscope – 1879 – January 21 – Roller guide fine focus mechanism, glass stage plate, detachable object carrier. U.S. patent 222,132 – Improvement in Eye-Pieces and Objectives in Telescopes and Microscopes – 1879 – December 2 – A triplet correction lens to be used in eyepieces. References
John Jacob Bausch (born Johann Jakob Bausch; July 25, 1830 – February 14, 1926) was a German-American maker of optical instruments who co-founded Bausch & Lomb (with Henry Lomb). Over six decades he transformed his small, local optical shop into a large-scale international enterprise, pioneering the American optical industry.
(Reuters) - The U.S. Food and Drug Administration (FDA) on Wednesday warned consumers not to use unapproved eye drops that closely resemble Bausch + Lomb's Lumify product for redness relief.
A scanning tunneling microscope ( STM) is a type of scanning probe microscope used for imaging surfaces at the atomic level. Its development in 1981 earned its inventors, Gerd Binnig and Heinrich Rohrer, then at IBM Zürich, the Nobel Prize in Physics in 1986. [1] [2] [3] STM senses the surface by using an extremely sharp conducting tip that ...
A travelling microscope is an instrument for measuring length with a resolution typically in the order of 0.01mm. The precision is such that better-quality instruments have measuring scales made from Invar to avoid misreadings due to thermal effects. The instrument comprises a microscope mounted on two rails fixed to, or part of a very rigid bed.
The steps are illustrated in the figure where an inverted microscope is used. Diagram illustrating the light path through a dark-field microscope. Light enters the microscope for illumination of the sample. A specially sized disc, the patch stop (see figure), blocks some light from the light source, leaving an outer ring of illumination. A wide ...
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