Terminology

  • TIR (Total Internal Reflection) Optic

    When light passes from a high refractive-index medium (such as glass) to a low refractive-index medium (such as air) there is a special angle, known as the critical angle, above which light is 100% reflected. Any light rays that fall within the critical-angle undergo total internal reflection. Carclo TIR optics use this principle to produce highly efficient optics with a huge variety of beam shapes.

  • Viewing Angle

    This is a term used for LED’s to describe the range of their angular output. It is the total cone angle in degrees at which the off-axis intensity falls to 50% of the on-axis peak.

  • Wavelength (λ)

    Distance between two points of corresponding phase and is equal to waveform velocity divided by frequency.

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