focusing tube
1Tube — A long hollow cylinder. There are many tube like structures in the human body, such as the auditory tube (Eustachian tube) in the ear. * * * 1. A hollow cylindrical structure or canal. 2. A hollow cylinder or pipe. SYN: tuba [TA]. [L. tubus]… …
2focusing coil — noun : a coil that focuses an electron beam (as in a cathode ray tube) by means of a magnetic field …
3Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
4electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …
5Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …
6Youngstown Sheet & Tube Co. v. Sawyer — SCOTUSCase Litigants=Youngstown Sheet Tube Co. v. Sawyer ArgueDateA=May 12 ArgueDateB=13 ArgueYear=1952 DecideDate=June 2 DecideYear=1952 FullName=Youngstown Sheet Tube Company, et al. v. Charles Sawyer, Secretary of Commerce USVol=343 USPage=579 …
7Gas focusing — Gas focusing, also known as ionic focusing. Rather than being dispersed, a beam of charged particles travelling in an inert gas environment sometimes becomes narrower. This is ascribed to the generation of gas ions which diffuse outwards,… …
8Hydrodynamic focusing — is a technique used by microbiologists to provide more accurate results from flow cytometers or Coulter counters for determining the size of bacteria or cells.Measuring particlesCounting cells happens by forcing them to pass through a small… …
9Whitechapel tube station — Whitechapel is a London Underground station in Whitechapel in the East London borough of Tower Hamlets. It is located on Whitechapel Road (A11) and is in Zone 2.The station is on the Hammersmith City and District lines between Aldgate East and… …
10extension tube — Photog. any of a series of tubes of varying lengths placed between the lens and a camera body to facilitate closeup focusing. [1955 60] * * * …
