index-matching material
1Index-matching material — In optics and fiber optics, an index matching material is a substance, usually a liquid, cement (adhesive), or gel, which has an index of refraction that closely approximates that of an optical element or fiber, and is used to reduce Fresnel… …
2Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… …
3Index (search engine) — Search engine indexing collects, parses, and stores data to facilitate fast and accurate information retrieval. Index design incorporates interdisciplinary concepts from linguistics, cognitive psychology, mathematics, informatics, physics, and… …
4Impedance matching — In electronics, impedance matching is the practice of designing the input impedance of an electrical load (or the output impedance of its corresponding signal source) to maximize the power transfer and/or minimize reflections from the load.… …
5Combined DNA Index System — CODIS FBI Logo The Combined DNA Index System (CODIS) is a DNA database funded by the United States Federal Bureau of Investigation (FBI). It is a computer system that stores DNA profiles created by federal, state, and local crime laboratories in… …
6Quasi-phase-matching — is a technique in nonlinear optics which allows a positive net flow of energy from the pump frequency to the signal and idler frequencies by creating a periodic structure in the nonlinear medium. Momentum is conserved, as is necessary for phase… …
7Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …
8Fresnel equations — The Fresnel equations, deduced by Augustin Jean Fresnel (pronEng|freɪˈnɛl), describe the behaviour of light when moving between media of differing refractive indices. The reflection of light that the equations predict is known as Fresnel… …
9Oil immersion — Principle of immersion microscopy. Path of rays with immersion medium (yellow) (left half) and without (right half). Rays (black) coming from the object (red) at a certain angle and going through the coverslip (orange, as the slide at the bottom) …
10Water immersion objective — In light microscopy, a water immersion objective is a specially designed objective lens used to increase the resolution of the microscope. This is achieved by immersing both the lens and the specimen in water which has a higher refractive index… …
