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HMI Fresnel Fresnels

Miscellaneous Fresnels

Moving Light - A moving light truss has a wider opening to accommodate the space required for a moving head light. . Used . . Used . ...

XY - A stereo recording technique using two identical cardioid or directional microphones placed next to each other at an angle of 90 degrees. This method is employed to overcome the coverage problems of . Used . AB recording. The main disadvantage being that audio from the center of the stage arrives at a 45 degree angle to the mics where the response is not as efficient leaving an apparent gap in t. Used . he stereo field. ...

Laser - LASER is acronym for Light Amplified by Stimulated Emission of Radiation and is an optical source that emits photons in a coherent concentrated beam. There are many different kinds of LASERs producing. Used . many different colors, but red is the most common.. Used . ...

Chase - A set of cues that loops again and again. This is a lighting console term.. Used . . Used . ...

Lighting instruments - There are a variety of instruments frequently used in the theater. Although they vary in many ways they all have the following four basic components in one form or another...

* Box/Housin. Used . g - a metal or plastic container to house the whole instrument and prevent light from spilling in un-wanted directions.
* Source of light (bulb or lamp).
* Lens or opening - the g. Used . ap in the housing where the light is intended to come out.
* Reflector - behind or around the light source in such a way as to direct more light towards the lense or opening.

Additional feat...

Fresnels

Fresnel lights are a specialized type of lighting that is used at concert venues and theatres in order to “wash” a specific area of the stage with light. Fresnel lights have a special lens which is able to produce a wider beam with a softer edge, ideal for top lighting and back lighting. Fresnel lights are mostly used for top and back lighting in theatre and concerts, and are placed at a short-to-medium distance from the actual stage. They can also be used for front lighting in smaller venues, as their soft beam is quite distinctive and cannot be replicated easily with other lights, although they suffer the disadvantage of a lack of control compared to ellipsoidal lights. The biggest difference between Fresnel lights and ordinary lights is that they feature quite a distinctive shaped lens, which rather than being smooth like most lenses, is ‘stepped’, giving it a much greater range of curvature. These ‘steps’ allow for the light beam to be more focused, while the light beam is also broken up as it passes through the lens, spreading the intensity fully across the light beam, hence a softer light is produced. Generally, Fresnel lights have a lens diameter of 3, 6 or 8 inches in theatrical use, while the wattage of the lamp can range from anything between 150 Watts to 200 Watts. For film lighting, Fresnel lights are often far more powerful, ranging in size from a 2 inch lens up to 24 inch lenses, while the wattage of the lamp can be as powerful as 20,000 Watts.