ADC Cast Optical Filters are the best solution for high quality display devices and data capture systems.

ADC OPTICAL PLASTIC
Fosta-Tek Optics' ADC cast thermosetting optical sheet has excellent optical properties. This optical plastic is sometimes referred to as organic glass because its optical properties are close to those of mineral glass. ADC (CR-39®) was originally developed as a replacement for glass prescription opthalmic lenses and currently holds over 60% of the prescription lens market.

Windows and filters made from Fosta-Tek's ADC optical plastic exhibit superior optical performance and display image quality due to ADC's clarity, high light transmission(over 92%), low haze, low yellowness index, high Abbe Value and lack of birefringence.(see comparison table below)

Abbe Value is an indicator of light dispersion or chromatic aberration. A low Abbe Value exhibits more chromatic aberration or dispersion, while a higher Abbe Value means less dispersion. Chromatic aberration results in fuzzy or blurred images when viewed on certain displays. ADC's exceptionally high Abbe Value makes it the ideal material for optical filters and instrument display readout windows.

Birefringence refers to the bending of light which causes a single beam to divide into two beams traveling in different directions. Eliminating lens Birefringence is critical to accurate data capture in barcode scanner systems and for quality imaging in instruments using LED or LCD displays. Fosta-Tek solves this problem by using a cast thermosetting process to manufacture its ADC optical sheet. Thermoset materials, in contrast to extruded or molded materials, generate very little birefringence.

Due to its superior properties, ADC optical sheet is ideal for use in a variety of applications requiring a high quality optical filter or display window including:

• ATM Displays
• Avionics Displays
• Barcode Scanners
• Industrial Instruments
• Medical Device Instruments
• Navigation Instruments
• Oscilloscopes
• Outdoor Work Stations
• Portable Test Equipment
• Scanning Devices
• Security Sensors
• Touch Screens

SIZE AND THICKNESSES
We can fabricate filters as small as 1"x1" and as large as 25"x25". Thicknesses range from .030" to .250". Display filters can be fabricated to meet almost any SIZE or thickness requirement.

POLYMER OPTIONS
Our standard polymer formulation is designated ADC200. Special formulations can be customized for applications requiring higher UV absorption and/or resistance to high heat.

COLORS
Display filters and windows can be furnished in a wide range of colors. Colors can be spectrally matched to any display output to improve readability.

FROST/SURFACE FINISH OPTIONS
ADC filters are available in three anti-glare matte finishes. These surface finishes are cast into the material, are durable and provide excellent glare reduction while maintaining resolution. The three standard gloss levels are:

• GL-1L: light matte finish, light glare reduction; (125-145 Gloss Units)
• GL-2M: a medium matte finish, medium glare reduction; (90-110 Gloss Units)
• GL-3H: a heavy matte finish, high glare reduction; (65-85 Gloss Units)

Fosta-Tek also offers surface finishes with mirror coatings, super hardcoatings and vacuum deposited anti-reflective coatings.

FABRICATION/FINISHING OPTIONS
Optical filters can be custom fabricated to most sizes and shapes, including holes and slots, hot-forming to shapes and silk screening. Our in-house capabilities mean your filters are ready to install upon delivery.

SPECIFICATIONS
ADC optical filters meet the following specifications:

• L-P-516A, Class G3
• UL94HB

ORDERING CONSIDERATIONS

• Polymer Option: ADC200, or custom
• Thickness: .030" - .250"
• Size: up to 25" x 25"
• Gloss Level: GL-1L, GL-2M, GL-3H, or Clear
• Color: Customer chip or color code
• Other Finishing Requirements:
  • Additional coatings
  • Silk-screen requirements
  • Detailed print for laser cutting

                                                 CR-39® is a registered trademark of PPG