Date: Thursday 10th July 2008
Venue: Photonics Cluster (UK) - Faraday Wharf, Aston Science Park, Birmingham B7 4BB
Course Tutor: Robert Yeo, Pro-Lite Technology
Price: £395 plus VAT for PC(UK) members
£495 plus VAT for non PC(UK) members

To register, please download and complete a registration form from www.astonsciencepark.co.uk/forthcoming-events.html and fax back to +44 (0)121 250 3567.

For any queries, please call the Aston Science Park events team on +44 (0)121 250 3505 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

The Practical Light and Colour Measurement course now includes four structured, hands-on practical sessions designed to demonstrate the light measurement principles discussed earlier in the course and also to give delegates the opportunity of using the state-of-the-art photometric equipment maintained in the Photonics Cluster (UK) laboratory. The four practical demonstrations comprise:

1.Measurement of LED spectral radiant and luminous flux, chromaticity, dominant wavelength and colour rendering using a Labsphere integrating sphere spectroradiometer. The calibration procedure and importance of performing auxiliary correction will be demonstrated.

2.Measurement of the spectral radiant intensity, luminous intensity and colour of a LED-based theatre light using a Bentham telespectroradiometer.

3.Measurement of the luminance and colour temperature of a uniform radiance source using a Radiant Imaging ProMetric CCD based imaging photometer as well as a Konica Minolta LS100 spot photometer.

4.Measurement of the illuminance from a lamp using a Konica Minolta CL200 photometer. This experiment will also demonstrate the effect of the inverse squared law.

Objectives
The course majors on how to get the right results (and how to avoid common mistakes) when measuring the output of LEDs and other light sources. The key topics addressed in the course include:

• Light and how we see it.
• Using the correct units to define light source outputs.
• Using numbers to describe the colour of light.
• The importance of colour rendering.
• Choosing the right equipment.
• How to measure LEDs accurately.

The course provides an overview of the units used to define the output of LEDs, LED clusters and other light sources, as well as describing the type of equipment typically used in their measurement.

The course content covers the fundamentals of photometry and colorimetry and the practical aspects of the measurement of luminous flux, luminous intensity, illuminance, colour temperature, and chromaticity of light sources. The delegate also learns how to specify and use equipment to perform photometric, colorimetric and spectroradiometric measurements on LEDs, displays and other light sources.

Who should attend:
The course is intended for scientists, engineers, technicians, product planners, marketing managers and designers involved with the development or marketing of lighting systems or the assessment of LED technology on current or future products within industries such as lighting, displays, automotive, avionics, medical, healthcare, instrumentation, signals and others.

Course Outline:

Light and the Human Visual System

• Radiometry versus Photometry
• Measurement Quantities & Geometries
• The Light Measurement Matrix
• Luminous Flux; Illuminance, the Inverse Square & Cosine Laws; Luminous Exitance; Luminous Intensity & Solid Angle; Luminance
• Converting Between Units: Monochromatic vs Polychromatic Sources; Intensity to Illuminance; Illuminance to Luminance; Luminous Intensity to Flux; Flux to Intensity; Calculating Illuminance at a Distance & Off-Axis Illuminance.

Colourimetry

• Colour Vision and the Tristimulus Response
• Describing Colour Numerically
• Colour Temperature & Correlated Colour Temperature
• CIE Standard Illuminants
• Spectral Quantities (Peak & Centre Wavelength, Bandwidth)
• Dominant Wavelength & Purity
• Colour Rendering.

Review of Equipment used for Photometry

• Specifying Photometers for the Measurement of Total Flux, Illuminance, Intensity & Luminance.
• Colorimeters
• Spectroradiometers
• Imaging photometers
• Goniophotometers

LEDs - The Measurement Challenges

• Spectral Considerations
• Geometric Considerations
• Electrical & Thermal Considerations
• Optical Equipment Used for Testing LED Flux & Intensity
• Viewing Angle
• Colorimetric Measurement of LEDs
• Spectroradiometric Measurement of LEDs
• LED Colour Rendering
• LED Clusters – Special Considerations
• Reporting Considerations for LED Measurements.