Uvitron International SUNRAY 400SM Instruction Manual, Rev. H
Page 9 of 23
THEORY OF OPERATION (CONTINUED)
4
and UV-C regions have more energy and are effective for curing and removal of surface tack
for thin layers of coatings, inks and paints.
To allow the SunRay curing system to adapt to these different types of curing applications,
multiple replacement lamp types are available which are optimized for each of the visible,
UVA and UVB wavelength ranges. See the Accessories list in section 10.2 for ordering part
numbers of the optional lamp types.
Refer to the chart below for the wavelength ranges of the ultraviolet and visible light curing
bands of the electromagnetic spectrum.
ELECTROMAGNETIC SPECTRUM
Short
Waves
Gamma
Rays
X-
Rays
Ultraviolet
Light
Visible
Light
Infrared
Micro
Waves
Radio
Waves
Long
Waves
Range
Vacuum
UV
UV-C
UV-B
UV-A
Violet
Blue
Green
Yellow Orange
Red
Wavelength
[nm]
100-200
200-
280
280-
315
315-400
400-
440
440-
490
490-
570
570-
585
585-
620
620-
780
4.2 System Information
The SunRay 400SM has a very high power density light output, which will result in rapid, high
bond strength cures. The light intensity can be controlled somewhat by adjusting the distance
of the lamp head to the substrate being cured (larger distance results in lower light density
and intensity).
Intensity can also be adjusted by switching the system’s front panel lamp
power switch between full and standby settings, which will reduce intensity by approximately
one half. The lower power standby setting can be used for very reactive adhesives, or for
temperature sensitive curing substrates.
The SunRay 400SM utilizes a metal halide type arc lamp, which is powered by a tightly
regulated switch-mode power supply. This combination provides high intensity and consistent
light output, resulting in very fast and repeatable product curing.
A system block diagram is shown in Figure 8.
