Lumitex® Light Guide Film Technology

Lumitex is a certified ISO 9001 and ISO 13485 manufacturer.

Lumitex® Light Guide Film technology, Clad Flat Fiber™, transmits light from side-emitting LED’s, directing it through the film and refracting it upwards to light designated areas. The Light Guide Film can be integrated with electronic circuitry to create a simple, low-profile lighting system for applications in electronics, transportation, and medical markets

Clad Flat Fiber (CFF)

Clad Flat Fiber™ (CFF) utilizes Lumitex®proprietary processes to produce precisely-engineered light guides, delivering light exactly where it is needed. Light rays from side-emitting LEDs travel through the film and are refracted towards the surface by engineered optical features. Uniformity can be controlled through optical patterns and LED placement. Our proprietary CFF allows integration of electronics, LED’s, reflectors, brightness enhancing films, adhesives,and other components to optimize design for each application.


Features of CFF

  • Uniform lighting developed through proprietary optical processing and controlled through selective etch patterns and materials
  • Ability to have discreet lighting where it is required
  • Thin, low-profile film that provides the flexibility to backlight complex shapes and sizes
  • Full range of colors including RGBW
  • Design flexibility through color, sizing, layering and quick cost-effective prototypes
  • Integration of reflectors, electronics and other components provide flexibility and expertise where needed
  • Highly efficient optical design to minimize power required while optimizing brightness

Applications of CFF

  • Membrane Switches/Keypads
  • Badges
  • Accent Lighting
  • Automotive Interior/Exterior Lighting
  • Commercial Vehicle Lighting LCDs
  • Control Consoles
  • Human Machine Interface
  • Aerospace Lighting
  • Personal Protective Equipment
  • Keyboards
  • Medical Device Panels

Construction of CFF

  • Standard Sources:
    • Multiple LED Side Emitting standard sources including medical and aerospace grade in all colors, including RGBW
  • Standard Materials:
    • 3M Adhesives
    • High Reflective Inks
    • Flame Retardant Construction
  • Overall Design:
    • Lumitex is not limited to a square panel. Panels of different shapes and sizes can be made depending on application.
    • LED layout must have a minimum transition of 6mm to properly spread the light
  • Design Complexity:
    • Low: Light Guide only. Customer supplies their own sources and electronics.
    • Moderate: Light Guide and Source. Customer only needs to supply power.
    • High: Light Guide, Source, Electronics. Lumitex provides full integration into customer's design including diffusion layers, brightness enhancing fils, electronic components, PCB/FPC's, cabling and packaging.

Technical Specifications for CFF

  • Core material: Polycarbonate
  • Cladding: Acrylic
  • Offered Gauges: .2mm, .3mm, and .45mm
  • Efficiency: Up to 30%
  • Output: up to 1,000nits depending on application
  • Core index of refraction: 1.58
  • Numeric Aperture: 0.52
  • Operating Temperature: -40°C to 85°C
  • Standard for Uniformity: 50 to 75% typical (Uniformity based on Min/Max calculation)
  • Vicat Softening Temp: 134°C
  • Flexural Modulus for core material: 2500 Mpa
  • Tensile Break Elongation: 9%
  • Lumitex can work with any voltage requirements and will design around the source provided

The data and details in this document were correct and up-to-date at the time of printing and are intended to provide information on our products and their possible applications. It is the user’s responsibility to obtain the latest version of the product data sheet. This data sheet is not a specification and does not assure specific product characteristics or make reference to the suitability of the product for a specific application. Because Lumitex cannot anticipate or control every application, we strongly recommend testing of this product under individual application conditions. The application, use and conversion of this product are the user’s responsibility


NOTE: Lumitex does not assume any responsibility or liability for any advice furnished by it, or for the performance or results of any installation or use of the product(s) or of any final product into which the product(s) may be incorporated by the purchaser and/or user. The purchaser and/or user should perform its own tests to determine the suitability and fitness of the product(s) for the particular purpose desired in any given situation.