Sony ISSUE 3 manual Developed a range

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Transfer register
Exwave HAD CCD
Hole accumulated layer
Hyper HAD CCD
Ineffective area

Choosing a Camera

developed a range of

solutions, the most popular of which include

hybrid cameras that operate in colour when lighting is adequate, switching to monochrome as darkness falls. Some

cameras operate in low light by reducing the

number of frames captured to produce a

brighter picture although this causes problems when there is movement within the image.

Sony has developed a more radical approach by improving the sensitivity

of the CCD chip. On Chip Lens technology (OCL) increases the surface

area and sensitivity of the

CCD by locating a microlens on each pixel which results in more light being collected on the photosensitive layer. This technology has been developed most recently with the introduction of the ExwaveHAD CCD which has a highly advanced OCL structure. The result of these developments is a degree of sensitivity that can handle twilight light levels while still producing accurate colour images even with rapidly moving objects.

Smear is caused by the leakage of light onto the vertical shift register, creating a vertical bar across the image which can render it useless and is a common problem with cameras in low light or where there are bright spots in the picture.

With ExwaveHAD, this leakage is reduced because the improvement in the structure of the CCD minimises the undesirable reflection of light onto its surface. As a result, smear is reduced to a minimal level of -120dB – comparable to the frame interline transfer CCDs commonly used in broadcast cameras.

Sony now produces both colour and monochrome cameras which benefit from the advanced technology of ExwaveHAD technology.

14

The Sony Guide to CCTV . Issue 3

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Contents Cctv Contents Recent years Brian KellySony gives Newham a clearer picture Underground ExpandedDaewoo savings with Sony PMS Any suspicious activity on a Daewoo forecourt orFarsight Chooses HSR-1PWhat is Closed Circuit Television? When and where should it be used? Security applicationsSurveillance applications BenefitsLight SnowLight LUX DescriptionBacklight Compensation Camera Choosing aBenefits of CCD Technology Choosing a Camera SensitivityWhich lens? Colour RenditionCamera Resolution Sony ExwaveHAD CCD TechnologyDeveloped a range Selecting Correct LensFocal Length F Basic LensSelecting the Correct Lens Aperture rangeLens Format Cameras with Built-in LensWhich Monitor? Monitor sizesMonitor costs Which Monitor?Colour monitors Transmission Video SignalsCoaxial Cables Transmission of Video Signals Twisted PairFibre Optics Isdn TransmissionLocalRemote Video Switching and Multiplexing SwitchersVideo Switching and Multiplexing MultiplexersHousings and Enclosures Cctv Systems ControlTelemetry DomesAnalogue Recording RecordingDigital Recording Recording Video PrintersSony Cctv Products Colour CCD CamerasSony Cctv Products Colour Video MonitorsTime-Lapse Video Recorders SVT-L230PDigital Surveillance Recorder QuadBasic Cctv Terminology APCBasic Cctv Terminology Depth of FieldMechanical Focus Sony Guide to Cctv Issue Freepost OF1503 Sony Guide to Cctv Issue CA CCTVGUIDE3