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Using the Bausch & Lomb Spectronic 20 Colorimeter, 1962. 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]
A Wild M400 macroscope. A macroscope or photomacroscope in its camera-equipped version (in German: makroskop / photomakroskop) is a type of optical microscope developed and named by Swiss microscope manufacturers Wild Heerbrugg and later, after that company's merger with Leica in 1987, by Leica Microsystems of Germany, optimised for high quality macro photography and/or viewing using a single ...
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.
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.
It was invented by the German physiologist Hermann von Helmholtz in 1851, although an earlier model was developed in 1796 by Jesse Ramsden and Everard Home. A keratometer uses the relationship between object size (O), image size (I), the distance between the reflective surface and the object (d), and the radius of the reflective surface (R).
Leica Microsystems GmbH is a German microscope manufacturing company. It is a manufacturer of optical microscopes, equipment for the preparation of microscopic specimens and related products. There are ten plants in eight countries with distribution partners in over 100 countries.
The firm renamed itself Bushnell Performance Optics. Three years later, Bushnell retired as vice-president of Bausch & Lomb. [2] In 1999, Bausch & Lomb sold Bushnell Performance Optics to the private equity firm Wind Point Partners through a recapitalization of Bushnell's then parent company, Worldwide Sports & Recreation. [3] [4] [5]
Diagram illustrating the light path through a dark-field microscope. The steps are illustrated in the figure where an inverted microscope is used. 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 ...