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Colored Glass

Kopp has been at the forefront of industry innovation for nearly a century. At the turn of the 20th century, with the onset of the railroad, there was a need for improved safety. We responded with the invention of "Selenium Red" glass and manufacture of these red glasses into lenses which quickly became the standard for railroad signal lighting. Since then, our ability to adapt and respond to changing technologies and deep understanding of industry requirements has enabled the expansion of our Colored Glass offerings. These glasses are engineered to withstand the punishing environments of mission-critical applications by offering superior durability, resistance to abrasion, chemical corrosion and thermal shock. They are compatible with a variety of light sources, including white and colored LEDs, plasma, HID, and incandescent.

Not only do our glasses meet our own and customer-specific performance specifications, but our glass formulations are also designed to meet industry and regulatory standards, including:

  • Federal Aviation Administration (FAA)
  • Military Specifications (MIL)
  • International Civil Aviation Organization (ICAO)
  • American Railway Engineering and Maintenance-of-Way Association (AREMA)
  • SAE International (SAE)
  • Institute for Traffic Engineers (ITE)
  • Underwriters Laboratories (UL)
  • Atmosphere Explosives (ATEX)

  • Green Glass Transmission Graph

    Click here to view green glass data.

    Glass

    Primary Application

    Industry Specification

    Nominal Thickness (in)

    Light Source

    4178 Aviation SAE 25050 0.100 - 0.160 Incandescent
    418X *The glasses in the 418X series were averaged and plotted as one glass in the graph displayed above. They have the same spectral transmission, but differ in thickness.
    4180* Aviation SAE 25050 0.080 - 0.125 Incandescent
    4181* Aviation SAE 25050 0.120 - 0.190 Incandescent
    4182* Aviation SAE 25050 0.125 - 0.210 Incandescent
    4183* Aviation SAE 25050 0.150 - 0.260 Incandescent
    4184* Aviation SAE 25050 0.175 - 0.310 Incandescent
    4185* Aviation SAE 25050 0.215 - 0.380 Incandescent
    4186* Aviation SAE 25050 0.220 - 0.400 Incandescent
    4188* Aviation SAE 25050 0.370 - 0.675 Incandescent
    4191 Aviation SAE 25050 0.460 - 0.600 Incandescent
    4210 Railroad, Signal AREMA 0.050 - 0.065 Incandescent
    4286 Aviation (Low CTE) SAE 25050 0.175 - 0.335 Incandescent
    4289 Aviation (Low CTE) SAE 25050 0.410 - 0.740 Incandescent
    4583 Aviation (ICAO) ICAO 0.150 - 0.270 Incandescent
    4584 Aviation (ICAO) ICAO 0.160 - 0.290 Incandescent
    4601 Aviation (Identification) SAE 25050 0.125 - 0.200 Incandescent
    4650 Signal - 0.200 Incandescent
    4651 Aviation EB67D 0.150 - 0.350 LED
    4786 Aviation EB67D 0.250 - 0.500 LED
    4801 Signal - 0.175 - 0.235 Incandescent
    4885 X †The glasses in the 4885X series were averaged and plotted as one glass in the graph displayed above. They have the same spectral transmission, but at different nominal thickness ranges.
    4885 E† Aviation (Low CTE) SAE 25050 0.170 - 0.275 Incandescent
    4885 F† Aviation (Low CTE) SAE 25050 0.220 - 0.360 Incandescent
    4885 G† Aviation (Low CTE) SAE 25050 0.250 - 0.375 Incandescent
    4885 H† Aviation (Low CTE) SAE 25050 0.300 - 0.485 Incandescent
    4885 I† Aviation (Low CTE) SAE 25050 0.350 - 0.530 Incandescent