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Optical and Lighting Software: LED Fundamentals

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In this presentation we will look at the differences between optical and lighting software, when each type of software should be used, and appropriate light source models for each software type.

In this presentation we will look at the differences between optical and lighting software, when each type of software should be used, and appropriate light source models for each software type.

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Optical and Lighting Software: LED Fundamentals Presentation Transcript

  • 1. LED FundamentalsOptical and LightingSoftware01-03-2012
  • 2. What is the Difference Between “Optical Software and Optical Software” “Lighting Software”? Optical Software Lighting Software High-end software packages Lighting design; look & feel of the Design & analysis of optical system scene Raytrace Analysis of application y pp Precision Speed Package-specific rayfiles IES or Eulumdat distribution filesLED Fundamentals | Optical and Lighting Software | Page 2
  • 3. When do I Need Optical Software?Optical Software Design optical elements (lenses, reflectors) Design & analysis of complete optical system Surface treatments Materials Lit appearance (glare) Raytrace y Package-specific rayfilesLED Fundamentals | Optical and Lighting Software | Page 3
  • 4. What are Rayfiles? Tabulated data with the properties of each ray exiting the LED:  Coordinates of the ray starting point (x, y, z)  Direction of the ray (kx, ky, kz)  Power/flux o the ray o e / u of e ay  For some optical software, the wavelength of the rayLED Fundamentals | Optical and Lighting Software | Page 4
  • 5. How are Rayfiles Generated? Rayfiles are g y generated in one of two ways: y Simulation Measurement Optical model which considers: Rayfile created via:  Bi-directional Scattering Distribution  Using a near-field goniometer Functions (BSDF’s) of package materials  Luminance pictures are measured from  Chi emission patterns Chip i i tt various angles around th LED i l d the  Complex geometrical features within the  Using a special algorithm, the collection of LED package luminance pictures are converted to rays  Mie scattering of diffusers  Ray data is converted to rayfiles of different  Wavelength conversion by phosphors software format.LED Fundamentals | Optical and Lighting Software | Page 5
  • 6. How are Rayfiles Generated? Rayfiles are g y generated in one of two ways: y Simulation Optical model which considers:  Bi-directional Scattering Distribution Functions (BSDF’s) of package materials  Chi emission patterns Chip i i tt  Complex geometrical features within the LED package  Mie scattering of diffusors  Wavelength conversion by phosphorsLED Fundamentals | Optical and Lighting Software | Page 6
  • 7. How are Rayfiles Generated? Rayfiles are g y generated in one of two ways: y Measurement Rayfile created via:  Using a near-field goniometer  Luminance pictures are measured from various angles around th LED i l d the  Using a special algorithm, the collection of luminance pictures are converted to rays  Ray data is converted to rayfiles of different software format.LED Fundamentals | Optical and Lighting Software | Page 7
  • 8. Rayfiles Onlinehttp://catalog.osram-os.comhttp://catalog osram-os comClick on “Ray Files” iconLED Fundamentals | Optical and Lighting Software | Page 8
  • 9. Rayfiles OnlineLED Fundamentals | Optical and Lighting Software | Page 9
  • 10. What can Lighting Software do for me? Create any lighting scenario using OSRAM Opto Semiconductors LEDs as y g g g p the light sources or in a fixture.  Full software for calculating lighting layouts – Create detailed interior and exterior illuminated scene models – Create detailed lit renderings – Calculate lighting levels on all surfacesLED Fundamentals | Optical and Lighting Software | Page 10
  • 11. What are IES Files?IES file Illumination Engineering Society Photometric data (intensity in candela vs angle) vs. ASCII text file, file extension *.ies Commonly used in North AmericaEulumdat file European version of the IES file File extension *.ldtLED Fundamentals | Optical and Lighting Software | Page 11
  • 12. How are IES Files Generated? Measurement SimulationLED Fundamentals | Optical and Lighting Software | Page 12
  • 13. IES files for Individual LEDsLED Fundamentals | Optical and Lighting Software | Page 13
  • 14. Thank you for your attention.LED Fundamentals | Optical and Lighting Software | Page 14
  • 15. Disclaimer All information contained in this document has been checked with the greatest care. OSRAM Opto Semiconductors GmbH can however, not be made liable for any damage that occurs in connection with the use of these contents. OSRAM Opto Semiconductor GmbH makes no representations and warranties as to a possible interference with third parties intellectual property rights in view of products originating f i i ti from one of OSRAM Opto Semiconductor GmbHs partners, or in view of f O t S i d t G bH t i i f products being a combination of an OSRAM Opto Semiconductor GmbHs product and a product of one of OSRAM Opto Semiconductor GmbHs partners. Furthermore, OSRAM Opto Semiconductors GmbH cannot be made liable for any damage that occurs in p y g connection with the use of a product of one of OSRAM Opto Semiconductor GmbHs partners, or with the use of a combination of an OSRAM Opto Semiconductor GmbHs product and a product of one of OSRAM Opto Semiconductor GmbHs partners.LED Fundamentals | Optical and Lighting Software | Page 15