Reflexite

Welcome to the Reflexite Display Optics Public Access Network for Optical Engineering.

Links

• Display-Optics.com: Reflexite Display Optics official company website.
• Reflexite.com: Reflexite Corporate official company website.
• Login: for Administration.
• Reflexite VPN: Private network content.

Frequently Asked Questions

• EtendueExplained: What is etendue? or... How does the principle of conservation of energy apply to light collection?
• FluxAtDetector: What is the "correct" way to calculate the flux at a detector? I've seen equations that use solid angle and equations that use half-angle.
• FresnelMagnifier: How do I choose a Fresnel lens for my magnifier application?
• FresnelSpotSize: What is the spot size of a focussing fresnel lens?
• SolarFresnelConcentrator: How do I choose a Fresnel lens to achieve a certain solar concentration ratio?

Knowledge Base

• EmbeddedSourceVirtualImage: An example for making approximations of various properties of an embedded LED die
• EtendueEquations: Geometric characterization of an optical system independent of the flux content
• FnumRayAngle: Definitions of the f/#, Numerical Aperture and Ray Angle
• FresnelLensFundamentals: Principle definitions for the Fresnel Lens
• FluxCalculations: Overview and examples of photometry calculations
• LedFluxApproxCalc: Derivation of some flux approximating equations for LEDs
• PhotometrySphericalCoordinates: The Photometry Right Handed Spherical Coordinate System
• PhotometryCoordinateSystems: Graphical representations of various coordinate systems used to specify photometric plots.
• PrismTransmissionEfficiency: Calculation of transmission efficiency through facets based on geometry and Fresnel Equations
• SolarConcentration: Overview information on solar collection and the application of fresnel lenses
• SphericalDifferential: Fundamentals of calculating solid angle including right circular cone example
• ThinLensNewtonianEquations: Idealized thin lens formulations

Reflexite Publications

• Technical Papers
  • Here are a few of the publications from the Technical Papers section...
  • Light Emitting Diode Source Modeling for Optical Design: This is the presentation in workbook form that was presented at the Intertech LED 2004 conference. Topics covered include Photometry, LED Optical Specifications, Computation Methods and Fresnel Lenses.
  • Microstructured Optics for LED Applications: Optics for use with Light Emitting Diodes are described. Microstructured optics are available and customizable for a wide variety of applications. A few of these will be touched on. A methodology of designing these optics and the photometrics of the typical technology is overviewed.
  • Fresnel Lenses in Rear Projection Displays: A plastic Fresnel lens positioned just before the diffusion screen in a projection system can provide significantly superior corner illumination, enhancing overall display luminance uniformity. Fresnel lenses are also used within the light engine to collimate light through the LCD panel and focus light through the projection lens. Disadvantages include the added cost of the lenses, ghosting, printout of the Fresnel rings and moire patterns. Birefringence is important to control polarization-sensitive applications. Without reduction of ghosting artifacts, Fresnel lenses will have limited application in text-based RP systems. Ghosting is described in some detail including how it is caused, quantified and reduced. Efforts to reduce cost and birefringence will all be discussed.
• Technical Product Information
• Application Notes
  • Display Applications
  • Passive Infrared Applications
  • Lighting Applications
• Available Optics
  • Positive Fresnel Lenses
  • Fresnel Cylinders
  • Prisms
  • Beamsplitters
  • Lenticulars
  • Surface Relief Diffusers
    • SN1330 asymmetric surface relief diffuser: SN1330 asymmetric surface relief diffuser
    • SN1332 asymmetric surface relief diffuser: SN1332 asymmetric surface relief diffuser
  • Lens Arrays
• LED collimating lenses
  • IO8826 Lens: IO8826 Lens
  • SC1933 Lens: SC1933 Lens

Questions, comments and problems should be addressed to:
Art.Davis@Reflexite.com.