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Photometry, Colorimetry & Spectroradiometry -
a Training Course on the Science of Light Measurement

Training

Who is the training aimed at?

This two or three day training is designed for engineers as well as technical marketing personnel who are working with LEDs, lighting, displays and vehicle lighting. 

What will you learn?

  1. Understand how the human vision system works – the photopic, scotopic, mesopic and colorimetric response of the eye.
  2. Understand the metrics used in light measurement, radiometry, photometry, colorimetry, spectroradiometry & goniophotometry.
  3. Learn how to communicate specifications clearly and effectively within your supply chain and with customers.
  4. Learn how to choose the right light measurement equipment for your application.
  5. Learn how to make accurate light measurements, including practical, hands-on training in the Photometric Testing laboratory.

What’s New?

For 2018, the Photometry Training has been expanded to two full days, which now includes both the theory of light measurement and practical hands-on sessions in the Photometric Testing laboratory. New topics added include:

  • How to read LED & luminaire datasheets.
  • Understanding flicker and the IEEE 1789 method.
  • Colour rendering and the new IES TM-30-15 method.
  • Compliance with BS EN 60598:2015 with regard to photobiological safety and the blue light hazard

The Photometry Training now serves as a lead-in to the Photobiological Safety training module held on the third day. Delegates can choose to attend either the Photometry or the Photobiological Safety modules (or both).


Key Information

Date: Click here for course dates Location: Photometric Testing, GL51 6PN
       
Time: Theory (Day 1) - 09:00 - 17:00
Practical (Day 2) - 09:00 - 17:00
Location Map: Photometric Testing, GL51 6PN
       
Fee:

£625 (ex VAT) for 2 days
£850 (ex VAT) - combined with Photobiological Safety training

Nearest Train: Cheltenham
       
Your Tutors: Robert Yeo
David Chambers
To Register: Download registration form
       
What's Included: 1. Refreshments
2. Lunch
3. Handout
4. Certificate of Completion
Joining Instructions: Photometric Testing Joining Instructions
       

Course Syllabus

Day1: Theory (09:00 - 17:00)
   
§ 1.0 The Human Vision System
  • Understand how we perceive light - the photopic response of the eye and how our perception varies at low levels of light
  • Understand how we perceive colour - how human vision is based on the relative amounts of red, green and blue light that we see
§ 2.0 Measurement Metrics
  • Learn how to express the amount of light - the differences between total flux (lumens), the intensity shining in a particular direction (candelas), the intensity that illuminates a surface at a certain distance (illuminance in lux) and the brightness of light emitted by or reflected from a surface (luminance in candelas per square meter)
  • Learn how to express the colour of a light source - chromaticity (colour space) diagrams, chromaticity coordinates (xy, uv, u'v') and the "simplified" colour metrics of correlated colour temperature (CCT in Kelvin) and dominant wavelength
§ 3.0 Measurement Equipment
  • Learn about the types of equipment used as well as the practicalities of measuring the amount and colour of light:
    a. Integrating spheres for total flux measurements
    b. Photometers for measuring illuminance and luminous intensity
    c. Spot photometers for measuring the brightness of displays and signs
    d. Colorimeters for measuring colour and colour temperature of light sources.       e. Spectroradiometers - being a more accurate type of photometer or colorimeter,
        as well as recording colour rendering
    f. Goniophotometers for measuring the intensity or luminance of a light source or
       display as function of angle, and how to compute view angles and generate
       standard photometric files in .ies and .ldt formats
  • Issues with measuring LEDs – be aware of the potential pitfalls
§ 4.0 New Modules for 2018
  • How to read an LED and a luminaire datasheet - what do the charts and numbers mean?
  • Flicker - what it is, how is it caused, why it's a problem and how to measure it. We'll also explain the new IEEE 1789 flicker standard and how to determine if your light source    exhibits good flicker or bad flicker
  • Colour rendering - what it is, how it is measured and the differences between the new IES TM-30-15 colour rendering metric and the original CIE 13.3 system, and how it levels the playing field for LED lighting
  • Photobiological safety - now that photobiological safety assessment in accordance with BS EN 62471 is a requirement of the updated luminaire standard BS EN 60598, we'll revisit how to make photobiological safety measurements and to determine the appropriate risk group for your product
Practical Projects
   
§ 1.0 Measuring Luminous Flux, CCT & CRI
Calibrating and using an integrating sphere to measure the performance of a lamp
   
§ 2.0 Standard Photometric Data
Measuring the luminous intensity distribution from a luminaire and compiling / manipulating photometric data files in .ies and .ldt formats
   
§ 3.0 Studying the Inverse Squared Law
Measuring illuminance at different distances from a lamp and calculating luminous intensity; demonstrating the near-field versus far-field
   
§ 4.0 Luminance Measurements
Measuring luminance and comparing readings between a spot photometer, an imaging photometer and a spot spectroradiometer
   

 

Related Services
Course Dates
Registration Form
Brochure
Testimonials

The following comments about our training course were kindly provided by staff at retail lighting specialists Microlights:

"Microlights pride ourselves on understanding customer needs. Robert Yeo understood our training requirements and educated us so that we can pass technical information on to our customers in a clear and concise way."

"Technical information, provided in a non-technical way."

"Detailed, tailored training - yet easy to understand."

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