20
Dymax EC-Series Flood Lamps for UVCS Conveyors User Guide
Definition of Terms
Brightness
, also known as
Luminance
- Description of energy in the visible region of the spectrum
(approximately from 400 to 700 nm) and recorded in photometric units. “
Intensity
” (see below) of visible light
energy is called Illuminance.
Dose - irradiance integrated over time, or Irradiance (W/cm
2
) x Time (s) = Dose (Joules/cm
2
).
NOTE:
Watt is the power that gives rise to the production of energy at the rate of 1-joule (J) per second (s).
Flood Lamp System
- set of components arranged to generate, collect, condition and direct UV radiant energy
to perform curing of engineering adhesives, coatings, and inks within a safe and controlled process. It includes
a lamp housing and power supply and may also include a shutter, workstation, UV enclosure, Dymax light
shield, and/or accessories.
Illuminance
- Luminous flux (energy of visible light) incident per unit area, and measured in
Lx
(lux) or
Lumen/cm
2
.
Intensity
- a measure of light energy over the unit of surface area (usually the surface at the specified working
distance from the bottom of the reflector housing) in W/cm
2
or mW/cm
2
.
Lamp
- light source (bulb or burner) generating ultraviolet, visible, and infrared radiant energy from burning
matter stimulated by electrical power conditioned by a proper power supply which is an integral part of a
lamp. A light source is usually placed into a reflector (of various geometry) to increase light source efficiency
by collecting and directing radiant energy of selected spectra (for a given curing process).
Ozone
- oxidizing agent (O
3
) produced by the action of ultraviolet radiant energy (below 185 nm) or electrical
corona discharge of oxygen on air.
Ultraviolet (UV)
- The invisible region of the spectrum just beyond the violet end of the visible region.
Wavelength ranges in general from 1.0 to 400 nm. Dymax lamps (bulbs) do not radiate energy in deep
ultraviolet; there are very minute amounts below 220 nm and practically nothing can be sensed below 200
nm. This is due to the use of ozone-blocking quartz bulb envelope (See Ozone).
Ultraviolet is used beneficially in various fields of industry and medicine. In order to standardize light sources
used in medicine, the International Congress on Light, in Copenhagen in 1932, recommended dividing the
ultraviolet spectrum into three spectral parts:
■
Ultraviolet A
(UV-A) - UV of long wavelength from within approximately 400 to 320 nm of the spectral
band (4000 to 3200
) - predominately produced by Dymax flood lamps.
■
Ultraviolet B
(UV-B) - UV of medium wavelength from within approximately 320 to 280 nm - Dymax flood
lamps produce some amount of their energy within this bandwidth.
■
Ultraviolet C
(UV-C) - UV of short wavelength below 280 nm (we say from 280 to 200 nm)
–
a large
amount of this energy is present in the sunlight.
