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Hitachi Kokusai Electric Inc
Tokyo Japan
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HV-D27A/HV-D37A
Color Camera
Tentative
Specification
(
2/17
)
1. General
HV-D27A/HV-D37A color camera is a separate type camera head utilizing three CCDs in a
compact and light weight and camera control unit (CCU) system.
By utilizing 410,000 pixels (470,000
pixels PAL) CCDs in addition to single LSI chip digital circuit construction from processor to encoder, both high
picture quality and high stability have been achieved. CCD size is 1/2-inch for the HV-D27A and 1/3-inch for the
HV-D37A.
Hitachi's extensive experience in broadcast and industrial color cameras has lead to an exclusive
14-bit digital processing technology that provides a host of important functions in a newly
developed LSI device. The high quality signal processing and image compensating functions were
unattainable in earlier analog cameras. The versatile C mount also allows use with a broad range
of optical systems and opens up applications in a wide variety of fields, factory automation, image
processing, microscope technology etc.
2. Features
1) Single chip LSI camera signal processor
Hitachi's leading edge processing technology (0.18
μ
m, internal core 1.8V drive, and 3 million
gates) is contained on a single newly developed ultra LSI chip. The system is compact and
consumes very little power. Also, the 12-bit A/D converter and 14-bit internal processor provide
high signal to noise ratio and wide dynamic range.
2) C mount
The camera uses a C mount lens, which is the de facto standard in the industry.
Note : Some lenses cannot be used. Check before use. See “9 when using lens”.
3) High resolution
The 410,000 pixel (470,000 PAL) CCDs with high sensitivity microlenses are mated to prism optics
using high precision matching technology. Accelerated digital luminance signal processing is
used to deliver
800 TV lines (HV-D27A) / 750 TV lines (HV-D37A) horizontal resolution (luminance
channel).
4) High S/N
A signal to noise ratio of 62 dB (60dB PAL) is attained by the new digital noise reduction system.
Clear, low noise images are obtained even in the high gain mode.
5) High sensitivity
The +24 dB high gain mode and digital gain function provide sensitivity and low light performance
0.5lx, F1.6 (HV-D27A)/0.9lx, F2.2 (HV-D37A). When combined with the digital noise reduction
system, pickup is enabled under adverse conditions that were beyond the reach of previous CCD
cameras.