Led Illumination in Machine Vision Applications

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Illuminator Specification.

• The Illuminator specification is based around
  the concept that SYI will provide an Illuminator
  Module which will deliver
• Multi Spectral Array - RGB with the Various
  Spectra LEDs chosen to give required Colour
  Gamut.
• Highest Brightness Led Arrays To achieve high
  intensity on Screen.
• High Density Array - To maximise brightness and
  also uniformity of image.
• Individual Array Addressibility To achieve
  addressibility so as to Pulse individual Colours
  and areas of the array as required.

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Illuminator Module Arrangement.

• Tasks needed to Define alpha prototypes
• Specify LEDs.
• Design Substrate.
• Design Drive Circuitry.
• Define Interconnects.

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Alpha Prototype Development Status / work done

• Concept is developed further from Initial
  Specification.
• LED types chosen to give
• Highest performance,
• Highest Density and
• Most feasable to use on substrate to minimise the
  interconnect count.
• Colours of leds available from this
  manufacturer. List.
• Comparison between Our LEDs and Luxeons. show
  here
• LED Substrate Layout Most Recent Rev
• LED Driver board schematic. (to be discussed)

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LED Selection
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Beta Prototype Status

• Confident of maintaining Works Package Schedule.
• No extremely long Delivery Schedules on raw
  materials.
• Low level of redesign expected for LED and
  Substrate from Alpha Prototype to Beta Prototype.
• Envisage Further Optical Element Design.

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What we hope to get from the Bristol Meeting.

• Update from other members of consortium on the
  development of the individual tasks.
• Define with HG the LCOS hardware - illuminator
  module integration
• how we will match the illuminator with the
  projectors optical assembly.
• Discuss System Thermal Performance.

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Agenda of Technical Issues.

• Decide on Substrate Geometry. Max Size of LED
  area available.
• Decide on Wavelength LEDs required from List
  available.
• Decide Electronics drives scheme, .Current
  Monitor??
• Define Integration with LCOS driver board.
  Connector type. No of Cables etc.
• Affirm the Sequence of driving the LEDs.
• Discuss System Calibration Scheme.
• Optics for the Alpha Prototype.. What is
  required from the Illuminator .
• Thermal Behaviour of the Module and system.