Terminology: Difference between revisions
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;corona: the area of transition between a beam's central hotspot and the area of spill. The corona becomes more prominent as the reflector surface is made rougher or more heavily textured, and also as the distance of the light emitting surface from the reflector focal point increases. | ;corona: the area of transition between a beam's central hotspot and the area of spill. The corona becomes more prominent as the reflector surface is made rougher or more heavily textured, and also as the distance of the light emitting surface from the reflector focal point increases. | ||
;CW: Cool White, a bluish LED tint. See article [[ANSI White]]. | |||
;<span id="CPF">CPF</span>: [http://candlepowerforums.com/ CandlePower Forums] A large flashlight discussion board and marketplace. | ;<span id="CPF">CPF</span>: [http://candlepowerforums.com/ CandlePower Forums] A large flashlight discussion board and marketplace. | ||
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<span id="N"></span> | <span id="N"></span> | ||
;Nailbender: a CPF member who makes high power P60 and other drop-ins for host lights. | ;Nailbender: a CPF member who makes high power P60 and other drop-ins for host lights. | ||
;NW: Neutral White, an LED tint. Should be just pure white, but realistically may have a vanilla, or light yellow or orange tint. See article [[ANSI White]]. | |||
<span id="O"></span> | <span id="O"></span> | ||
;<span id="OP">OP</span>: 1. orange-peel. A textured surface, e.g. for a reflector, used to smooth out beam imperfections. Compare to SMO. | ;<span id="OP">OP</span>: 1. orange-peel. A textured surface, e.g. for a reflector, used to smooth out beam imperfections. Compare to SMO. Also sometimes LOP for light orange peel (lighter texturing) or MOP for medium orange peel. | ||
:2. on conference posts can refer to "original poster," the person who originally started the thread. | :2. on conference posts can refer to "original poster," the person who originally started the thread. | ||
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;<span id="throw">throw</span>: the ability of a flashlight to place light onto a distant defined area of surface, i.e how well the light is collimated. The throw of a light source of fixed power will be defined by the surface brightness of the light emitter, and the shape, diameter, depth, smoothness, and reflective efficiency of the reflector surface. A flashlight with good throw characteristics is called a "thrower" and generally has a narrow beam that is best for illuminating objects at a distance (hundreds of feet). Compare with [[#flood|flood]]. The [[ANSI-NEMA FL-1|ANSI/NEMA FL-1]] standard states throw two ways: candela and meters. | ;<span id="throw">throw</span>: the ability of a flashlight to place light onto a distant defined area of surface, i.e how well the light is collimated. The throw of a light source of fixed power will be defined by the surface brightness of the light emitter, and the shape, diameter, depth, smoothness, and reflective efficiency of the reflector surface. A flashlight with good throw characteristics is called a "thrower" and generally has a narrow beam that is best for illuminating objects at a distance (hundreds of feet). Compare with [[#flood|flood]]. The [[ANSI-NEMA FL-1|ANSI/NEMA FL-1]] standard states throw two ways: candela and meters. | ||
;ti: Titanium - | ;ti: Titanium - metal used to construct higher end flashlights. Like stainless steel, it can have a variety of surface finishes and resists corrosion, but it is stronger and lighter weight. See article [[Materials#Titanium|Titanium]]. | ||
;<span id="TIR">TIR</span>: total internal reflection. A glass or plastic "lens" that collimates light rays from the light emitter, both by reflecting them and by refracting them. Theoretically, ALL of the light produced by the emitter is gathered by the TIR optic. See article [[Lenses]]. | ;<span id="TIR">TIR</span>: total internal reflection. A glass or plastic "lens" that collimates light rays from the light emitter, both by reflecting them and by refracting them. Theoretically, ALL of the light produced by the emitter is gathered by the TIR optic. See article [[Lenses]]. | ||
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<span id="V"></span> | <span id="V"></span> | ||
<span id="W"></span> | <span id="W"></span> | ||
;WW: Warm White, an LED or light tint, usually with an orange tint like an incandescent bulb. See article [[ANSI White]]. | |||
<span id="X"></span> | <span id="X"></span> | ||
<span id="Y"></span> | <span id="Y"></span> | ||
<span id="Z"></span> | <span id="Z"></span> | ||
;<span id="Vf">Vf</span>: Forward Voltage (a property of an [[LED]]). The voltage drop across a LED at a given current. If two LED's are identical except one has a lower Vf, the one with the lower Vf will draw a higher current from a battery and will also be brighter. | ;<span id="Vf">Vf</span>: Forward Voltage (a property of an [[LED]]). The voltage drop across a LED at a given current. If two LED's are identical except one has a lower Vf, the one with the lower Vf will draw a higher current from a battery and will also be brighter. | ||