HB-LED Illumination Design Consulting Service

We have been designing illumination systems with HB LEDs since the industry began with the HP/Philips joint venture in the late 1990's.  This joint venture eventually became Lumileds and is now one of several HB-LED manufacturers.  The continuous progress in LED package flux (lumens) output has doubled every 24 months for the last 30 years.  This is know as Haitz's Law, named after Dr. Roland Haitz of HP/Agilent/Lumileds.

LED TIR Lenses for LED-based Digital Projector

 

This output in flux per LED package doubling has enabled the HB-LED manufacturers to compete with the older established illumination source technologies in the last six years.  The HB LED is already established in many industries such as automotive, transportation traffic signals, displays, consumer electronics, entertainment, medical, dental, architecture, industrial lighting, home illumination, precision metrology, industrial processes, and the list goes on.

Philips Lumileds Luxeon®  Rebel for Fluorescence Microscope with HB-LED Illumination

Over the past six years, we have developed the techniques, tools, processes, and expertise to design optical systems that utilize HB LEDs in the illumination design consulting work we perform.  We would like to put this expertise and experience to work on your challenging illumination design problems.

OSRAM OSTAR® to Fiber Optic
with Coupling Sphere

Illumination Design with HB LEDs

What's the big deal?  Why is it so difficult to accomplish the task?

HB LED and TIR Lenses for High-efficiency
 Light Capture and Delivery

The 500 pound gorilla of illumination design is called étendue.  Étendue is a product or multiplication of the area of the emitter surface and the projected solid angle that the rays from the surface diverge into and the units are mm^2-Steradians.  This is a three dimensional version of the Lagrange invariant from imaging or conventional lens design.  It is the conservation of energy law of illumination design.  We like to say that if you don't try to beat étendue at least twice a week then you are not trying hard enough.  Illumination designers always seem to be bumping their creative brains into and up against this law frequently.

OSCI's RXI Design for
Collimated Light from a HB LED

Current vintage HB LEDs emit light into a very large angle, like the 180° hemisphere shown on the non-sequential ray trace above.  Remember illumination designers want to capture every photon of light from the source as system efficiency or system throughput is typically a very important design parameter in illumination designs.

HB LED with Compound Parabolic
Concentrator CPC Collection System

A photon is a terrible thing to waste.

If we want to capture every photon that is emitted into this hemisphere then we must have a large optical collection system near the source.  Large collection systems near the source are expensive  and often are made from injection molded polymers and glasses.  A concave positive meniscus lens is one choice and a reflective or refractive compound parabolic concentrator or CPC is often used.  A second choice is a fast aspheric lens which typically does not collect the full hemisphere so photons are wasted, and this is bad for through put efficiency.  The next step after collection is to get this collected light somewhat collimated or shaped and "optically plumbed" down the optical axis to the illumination plane.  Lets take a look at the whole process.

LED Fiber Tree for LED Digital
Projector Light Engine

LED Illumination System Measurement & Characterization

We are able to perform various optical, electrical, and thermal tests on HB LEDs and HB-LED optical systems to determine performance parameters of your illumination system.  We have measured parameters such as:

• Wavelength

• Center Wavelength

• Spectral Bandwidth - FWHM

• Power Spectral Distribution - power per wavelength bucket

• Color Rendering Index (CRI) - including R1 to R14 individual values

• Chromaticity Coordinates

• Color Temperature (CCT)

• Temporal Radiometric Properties of Pulsed LED Systems

• Spatial Uniformity of Irradiance or Illuminance

• Luminous Power

• Source Measurement, Characterization, and Modeling

• Source Imaging Goinometer

• Angular Distribution

• Thermal Optic Performance Properties

If you don't see what you need here please ask us.  We have probably done the measurement before and just don't have it listed here or can work with one of our state-of-the-art partners to get it done quickly and effectively so you can get on with your product development or design activities.

How Can We Help You With Your HB LED Project?

We would like to discuss your challenging illumination design project needs.  Our illumination design consulting engineers have a wealth of experience and we are interested in helping our clients solve their most challenging HB-LED illumination needs.

*NOTE:  OSCI Inc designs standard and custom round, square, and rectangular CPCs and TIR lens for High Brightness LED light sources such as CREE, Lumileds, Luminous Devices, OSRAM and other leading HB-LED light sources.

Contact us today with your basic requirements or current HB-LED challenges: 541-255-2165 or send us an email at mpate@oscintl.com

NEW Product!

OSCI's LumenHammer™
HB LED Light Engine

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We serve these LED Illumination Design Industries:

• Automotive

• Medical

• Dental

• Displays—DLP, LCoS, LCD Backlight (LED BLU)

• Transportation/Traffic

• Consumer Electronics

• Entertainment

• Architecture

• Industrial and Process Control

• Precision Metrology

• Machine Vision

HB LED Illumination Design Experience:

• TIR Lenses

• Flys Eye Array

• RXI

• LED Fiber Coupling

• LED & Lumenyte Plastic Fiber Optic Cable

Our Illumination Design Process

Our illumination design process consists of these seven steps:

• Source Model

• Collect Light from Source

• Optically Plumbed Down Optical Axis

• Illumination Plan - Angular and Spatial Properties

• Interaction with Device, Analyte, or Object

• Collect Light from Interaction

• Deliver to Detector or Display Device

Our Illumination Design Tools:

• Zemax® and
  NSC Zemax®

• FRED

• ProSource™

• Essential Macleod

• SolidWorks

• Mathematica®

• Matlab®

• MathCAD®

• ASAP®

• OSLO®

• TracePro®

• Code V®

• LightTools®

We've Designed Illumination Systems Using:

• Cree XR Series

• Cree MegaBright

• CREE XBright

• CREE SuperBlue

• Luxeon I

• Luxeon III

• Luxeon V,

• Luxeon K2

• Luxeon Dental

• Luminus Devices PhlatLight PT Series

• OSRAM OSTAR® 2x2 and 2x3

• OSRAM OSTAR® Projection

• Philips Lumileds Rebel

• And several others including custom designs

HB LED Manufacturer Links

 

Surface Texture Hemispherical Bumps for LCD Backlight Application

 

Luxeon Batwing HB-LED Emitting into Hemisphere

 

Twisted Light Pipe with Two Luxeon® LEDs