59
User and Service Manual
Doc # M010-004WWE July 2005
Gendex DenOptix® QST
Sunlight
Sunlight is efficient light for erasing imaging plates but it is not recommended that IPs are
left exposed to sunlight for extreme periods of time. Additionally, it is very difficult to judge
the intensity of sunlight. Loading carousels under sunlight must be avoided.
If you cannot darken your mounting area to 20 lux or less, contact your local Gendex
representative for suggested mounting times.
Recommendations on lighting conditions
for erasing imaging plates
In order to completely erase imaging plates, 99.5% of the image information must be
removed. Scanning only removes part of the information. To completely erase imaging plates,
follow the guidelines given below. It is important that you measure the light intensity with
a light meter at the point where the imaging plate will be positioned. The intensity of light
changes dramatically as you move away from the source. Erasing the imaging plates for
periods of time longer than suggested does not harm them. A good place to store your
imaging plates is under the erasing light source.
Fluorescent lights
We recommend using fluorescent lights for erasing imaging plates. A lightbox typically gives
off between 1000 and 5000 lux. Measure your lightbox and use the lowest value to deter-
mine the erasing time. At 1000 lux, an imaging plate will be erased in 1 minute. At 2000 lux
or more, 30 seconds is sufficient.
Incandescent lighting
At 1000 lux, an imaging plate will be erased in about 2 minutes. At 2000 lux or more, erase
for 1 minute.
Sunlight
We do not recommend using it.
If you are unable to directly measure the light output from your erasing light source, or
do not have an erasing light source greater than 1000 lux, use the practical test, below, to
de
t
ermine your erasing time.
Practical test
1. Completely erase five size 2 imaging plates by subjecting them to direct, intense light for
about 20 minutes.
2.
Scan the imaging plates. No image should appear on the monitor. If an image does appear,
repeat st
ep 1 wit
h a more intense light source.
3. Place the imaging plates in barrier envelopes as described in Section 5.3.
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