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By: Hitachi
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Industrial Video System & Broadcast
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Remote Head 3CCD Color Camera
The Hitachi HVD27A 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. 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.

Hitachi's leading edge processing technology (0.18 μm, 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. The camera uses a C mount lens, which is the de facto standard in the industry. 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). 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. 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. A personal computer can be connected directly (RS-232C) for remotely controlling the camera functions. Conversely, the camera mode data are sent to the computer to allow very precise camera control. In multiple camera systems, each camera can be assigned an ID number to enable controlling multiple cameras from a single computer.

Color system NTSC, PAL
Optical system 1/2-inch, F1.6 prism
Imaging system R, G, B 3 CCD
Picture elements 1/2-inch interline transfer CCD
Total pixels NTSC 811 (H) x 508 (V); PAL: 795 (H) x 596 (V)
Effective pixels NTSC 768 (H) x 494 (V); PAL: 752 (H) x 582 (V)
Effective image area NTSC: 6.34 (H) x 4.76 (V) mm; PAL: 6.35 (H) x 4.78(V) mm
Scanning system 2:1 interlace
Scanning frequency NTSC 15.735 kHz (H) x 59.94 Hz (V); PAL 15.634 kHz (H) x 50.00 Hz (V)
Encoder system R-Y/B-Y
Sync system Internal/external (VBS, BBS or HD/VD auto selection, when internal input/output switch is input position)
Horizontal resolution 800 TV lines, luminance signal center (Y out and DTL off)
S/N HV-D27A NTSC: 62 dB type (DNR on), 59 dB type (DNR off); PAL: 60 dB type (DNR on), 57 dB type (DNR off)(Y out, γ=1, DTL off, GAIN 0 dB)
Standard sensitivity 2000 lx, F11
Minimum illumination 0.5 lx (50IRE F1.6)
Gamma correction 0.45/1.0 (on/off)
Geometric distortion Full screen 0% (not including lens characteristics)
Registration Full screen 0.05% (not including lens characteristics)
Vertical contour compensation 2H
Lens mount C mount (flangeback 17.526 mm in air)
Sensitivity selection AGC (0 to 24 dB) or GAIN (0 to 24 dB step1dB or step 3 dB on remote control menu)
Detail control DTL level and frequency
Scene files 4 Files
Digital gain 6 dB, 12 dB sensitivity increase by digital signal processing
CCD drive functions - Preset 1/100 (1/60 PAL), 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/10,000 1/20,000 1/40,000 1/100,000 second
Lockscan NTSC: 1/60.38 to 1/2039 second (step 1H), to 1/100,000 second (step approx. 10% video level); PAL 1/50.31 to 1/2024 second (step 1H) to 1/100,000 second (step approx. 10% video level)
AES Off to approx. 1/100,000 second
Long term integration Field/frame integration selectable
Field integration NTSC: 1/30 to approx. 4 seconds (1 frame steps); PAL: 1/25 to approx. 4 seconds (1 frame steps)
Frame integration NTSC: 1/30 to approx. 8 seconds (1 frame steps); PAL: 1/25 to approx. 8 seconds (1 frame steps) (external image memory needed for continuous image)
Frame readout improves vertical resolution (residual image response deterioration)
Color bar NTSC: SMPTE, PAL: Full
Power supply voltage 12 V rated (Stable operation at 10.5 to 15 VDC (ripple and noise absent))
Power consumption Approx. 6.5 W
Dimensions HEAD 38.5(W)x46(H)x42(D)mm; CCU: 150(W)x45(H)x170(D)mm
Mass HEAD: Approx. 90 g (not including lens): CCU: Approx. 950g
Ambient temperature Operating: 0 to 45 °C; Storage: -20 to 60 °C



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Prices and specifications subject to change without notice.