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Fresnel - Fresnels are typically 8-, 6- or 4-inch, referring to the diameter of the lens. This light is named after Augustin-Jean Fresnel who invented the distinctive Fresnel lens which has a 'stepped' appearan. Used . ce instead of the 'full' or 'smooth' appearance of other lenses. The stepped nature of the lens causes a corresponding pattern of circles of light, so Fresnel lenses are usually 'stippled' on. Used . the flat side. This pattern of small bumps helps to break up the light passing into the lens to smooth out its eventual pattern.

Fresnels use a spherical reflector, with the filament of the bulb ...

Zirconium Lamp - A high intensity point source arc lamp using a zirconium oxide cathode in an argon-filled bulb. Used in powerful projectors because of its low emanation of long-wavelength light and its concentrated . Used . source. Similar to the Drummond light or Limelight, but differing from them chiefly in the employment of cones of zirconium instead of cylinders of lime. It has been outdated and replaced b. Used . y electric lighting....

MS - A stereo recording technique that uses of two different types of microphones, a directional or cardioid for the M facing forward and an omni-directional or figure-eight for the S with the lobes at a 9. Used . 0 degree angle. The main advantage being that the center sounds are not 45 degrees off-axis eliminating the gap in XY recording. Initially there were problems with reflections due to the use. Used . of two different types of mics, however mics have now been developed to overcome this problem....

Light Board - A light board is yet another name used to describe a lighting console.. Used . . Used . ...

Scanner - A common term for a moving mirror stage/concert light. This light in particular is common is clubs, discos and lounges. As opposed to the moving head lights that are more common for theatre, concerts. Used . and stage events. . Used .