Ai339
4) Notes on CCDs as Optical Elements
(1) This CCD features micro lenses that increase the ability of the photodiodes to collect light and color
filter that allow the CCD to recognize color information integrated on the chip itself in the sections
of the CCD that perform the photoelectrical conversion.
Since these on-chip components ate implemented using plastics, the transparency of the filter and
lens materials is reduced by the light that enters the CCD depending on the spectral characteristics,
intensity, and exposure time.
Due to this fact, these devices must be protected from UV light, sunlight, and any other bright light
during all phases of use and handling, including storage, transport and end product manufacture.
(2) If the same pattern is protected onto the CCD image sensor for an extended period, depending on
the intensity of the image and the time, that pattern may be burned onto the sensor resulting in the
pattern being reflected in the characteristic or variations in characteristic, regardless of whether of
not power is applied.
When not using a CCD, we recommend blocking all light and turning off the power.
5) storage environment
CCD is a precision optical product.
Therefore, temperature, humidity, radiation and static electricity etc. of storage environment have to be
controlled.
Please pay attention to the following when storing CCD.
(1) Storage condition of CCD
a) Packed Condition.
Please storage CCD as it packed on our delivery packing in the following environment.
Temperature
Humidity
: Ta = 25 ± 10 ℃
: RH = 60 % or less
: 1year
Storage life
b) Opened pack condition
When you opened pack, please keep environment as follows.
Temperature
Humidity
: Ta = 23 ± 5 ℃
: RH = 10 % or less
: 3 months
Storage life
If you can not store CCD in dry air, please keep environment as follows.
Temperature
Humidity
: Ta = 23 ± 5 ℃
: RH = 30 ~ 60 %
: 3 months
Storage life
But, the condition should fulfill the following equation.
RH < -3x Ts + 114 ( Red area in Fig.1 )
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