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40 Cards in this Set
- Front
- Back
- 3rd side (hint)
Par Can |
Parabolic Reflector Concave/ Convex High Intensity |
Par. Can (Cave) |
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Fresnel |
Fresnel lens Spherical reflector The light is softened Low intensity |
S is for... |
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ERS |
Ellipsodial Reflector Plano Convex Lens Shutters
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P is for... |
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Spherical |
Light is shoots out at the same angle it hits the reflector |
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Parabolic Reflector |
Light shoots out parallel to the reflector |
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Step Lens |
Steps in lens are for magnification and Diffusion of light |
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Ellipsodial Reflector |
Two focal points for flooding and spotting |
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Fresnel Lens |
Angled pattern is to soften the light |
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How does a reflector work? |
The Law of Reflection- The angle of reflection is the angle of incidence |
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How does a lens work? |
A lens changes how light comes out of an instrument |
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Wattage |
The amount of work being done, or power |
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Amperage |
Intensity |
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Voltage |
The electrical potential between 2 points |
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Series circuit |
All of the lights go out |
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Parallel circuit |
Only one goes out |
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Resistance Dimmer |
Stops some of the electricity |
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Scr dimmer |
Gating principle- turning the power of and off |
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Label a wave |
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Refraction |
Light is bent - diamond |
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LCL |
Lamp centerline length- used to properly allign the lamp with the reflector |
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Lux |
Brightness |
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Quartz halogen lamp |
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Arc lamp |
Addition of electricity excites the molecules |
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Incandescent lamp |
Uses heat to light up and doesn't burn filaments |
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How to find voltage |
V= WA |
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What is the maximum number of 750w source 4 insttruments can be used at 100%? |
Watts per dimmer/ watts of instruments (2000/ 750= 6 instuments) |
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How much available wattage is left on each dimmer? |
2000- 750= 1250- 750= [500 watts] |
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Given 11 700w fresnels, What is the minimum amount of 2.4 kw dimmers you need to utilize all of the instruments at full? |
2400/700= 3 3 maximum per dimmer 3 = dimmer 1 [8 left over] 3 = dimmer 2 [5 left over] 3 = dimmer 3 [2 left over] 2 = dimmer 4 4 dimmers |
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What is the load being used on each dimmer in the above question? |
Each fresnel is 700w 700x3= 2100w/ 100v= 21 700x3= 2100w/ 100v= 21 700x3= 2100w/ 100v= 21 700x2= 1400w/ 100v= 14 |
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Order of operation |
ICDC Instrument Circuit Dimmer Channel |
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Safety for electricity |
Rubber sole shoes Gloves Tie line on wrench Safety goggles
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Standard cable used in theatrical lighting |
SO- 12 guage 3 wire STO- 12 guage 3 wire |
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How does a Circuit breaker protect an electrical system |
When there is an overload of electricity used, a circuit breaker cuts the power off by breaking the circuit |
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Step down transformer |
Lessens the voltage and acts as a resistance for safety |
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Single phase wire system |
G----- H---- { 120 N---- |
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3 phase wire system |
X---- Y---- Z---- N---- |
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How do you wire a stage pin connector? |
1) Neutral Ground Hot 2) strain relief 3) ground is in center and is the longest pin
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Insulator |
Stops/slows the flow of electricity (ie glass/ rubber)
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Conductor |
Helps the flow of electricity (ie water metal) |
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DMX |
Sends packets of information to 512 different addresses |
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