ICX692AQA/ICX692AKA |
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■ Diagonal 6.0 mm (Type 1/3)
950K-effective pixel color CCD
image sensor
■ Progressive scan method
■ 720p (1280 x 720) high-definition
output at 30 frame/s
■ High sensitivity, high saturation
signal level and low smear
■ Low power consumption
"EXview HAD CCD II" is a trademark of Sony
Corporation.
The "EXview HAD CCD II" is aCCD image sensor that realizes sensitivity
(typical) of 1000 mV or more per 1 μm²
(Color: F5.6/BW: F8 in 1 s accumulation
equivalent) and improves light efficiency by
including near infrared light region as a basic
structure of Sony's "EXview HAD CCD".
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 High Sensitivity, High Saturation
Signal Level and Low Smear |
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A number of Sony's proprietary technologies
used in developing the ICX692AQA and
the ICX692AKA have led to significant
improvements over the current Sony products,
the ICX445AQA and the ICX445AKA
(diagonal 6.0 mm (Type 1/3) 1.25M-effective
pixel)*1. For example, sensitivity is now
2.1 times (+6.5 dB), saturation signal level
(dynamic range) is 1.86 times (+5.4 dB) and smear characteristics have improved by 6 dB
compared to the current products. (See table
2.) The vertical register, the readout gate and
channel stop regions have all been optimized
to raise the saturation signal level. These
changes have maximized the sensor area that
accumulates electric charges produced by
photoelectric conversion raising saturation
signal level by 1.86 times (+5.4 dB) over the
current Sony products. Also, advances in
fine fabrication technology have enabled
changes in electrode wiring structure that
lower the layer of the on-chip microlenses
and improve light collecting efficiency. And
photo shielding film reduces glare from light
reflections.
When the lens diaphragm is opened up and
a lower f-number is used, it controls the
reduction in light collecting efficiency caused
by changes in light incident angle.
Also, use of "EXview HAD CCD II" technology
has improved high sensitivity in the near
infrared light region. (See figure 1.) This
sensor is ideal for nigh-time shooting and
low-light photography using near infrared
cameras. In addition, reducing the thickness of
the oxide film below the photo shielding film
has successfully diminished contamination
of signals by smearing in the vertical register
and raised smear characteristics to -110 dB.
*1: See the New Products section in CX-NEWS,
Volume 44. |
| Low Power Consumption |
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The vertical registers in the ICX692AQA
and the ICX692AKA are optimized from
those employed in the current Sony products,
the ICX445AQA and the ICX445AKA. As
a result, electronic charge handling by the
vertical registers and their charge transfer
characteristics are maintained while lowering
the voltage (from VL-8.5 V to VL-7.5 V) of
the vertical transfer clock. Changes made in
the electrode wiring structure of horizontal
register to lower capacity between horizontal
clocks have maintained charge transfer
characteristics while lowering the voltage of
the horizontal transfer clock (from 3.6 V to 3.3
V). As an additional benefit, this has reduced
the voltage of the reset gate clock (from 3.6 V
to 3.3 V) and cut power consumption. |
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•••• Mr. Kondo ••••
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The development of the ICX692AQA
and the ICX692AKA involved numerous
challenges, but the concerted efforts
of the project team made it possible to
bring it to a successful conclusion. The
result is a CCD image sensor that will
meet the needs of any security camera.
We hope you will consider this sensor for
your new products. |
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See
all articles with figures and tables.  |
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Vol.66 |
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