path-length lens
21Index of optics articles — Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it.[1] Optics usually describes the behavior of visible,… …
22Four Thirds system — 4/3 redirects here. For 4:3 image aspect ratio, see Aspect ratio (image)#4:3 standard. Four Thirds logo The Four Thirds system is a standard created by Olympus and Kodak for digital single lens reflex camera (DSLR) design and development.[1] The… …
23Calculus of variations — is a field of mathematics that deals with extremizing functionals, as opposed to ordinary calculus which deals with functions. A functional is usually a mapping from a set of functions to the real numbers. Functionals are often formed as definite …
24Differential interference contrast microscopy — Micrasterias furcata imaged in transmitted DIC microscopy. Differential interference contrast microscopy (DIC), also known as Nomarski Interference Contrast (NIC) or Nomarski microscopy, is an optical microscopy illumination technique used to… …
25Astrophotography — An image of Orion s Belt composited from digitized black and white photographic plates recorded through red and blue astronomical filters, with a computer synthesized green channel. The plates were taken using the Samuel Oschin Telescope between… …
26List of products manufactured by Kodak — The following is a partial list of products manufactured by Kodak.For a list of Kodak motion picture film stocks, see List of motion picture film stocks. Computer printers Kodak has produced a range of Computer printers, concentrating on the… …
27spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
28Schlieren — (from German; singular schliere ) are optical inhomogeneities in transparent material not visible to the human eye. Schlieren physics developed out of the need to produce high quality lenses void of these inhomogeneities. These inhomogeneities… …
29Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… …
30Laser cutting — process on a sheet of steel. CAD (top) and stainless steel laser cut part (bottom) Laser cutting is a technology that uses a laser to cut materials, an …
