Colored Filter Glass

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Colored Filter Glass

Our colored filter glass compositions are engineered to transmit or absorb light across the radiant spectrum. These glasses are ideal for a wide variety of applications, including those for medical and scientific, advanced manufacturing, energy, aerospace, transportation, defense, life science, industrial equipment, and lighting industries.

Our filter glass compositions can be molded into complex forms that are traditionally difficult and expensive to achieve through fabricating. They’re also available as 6.5” squares of filter glass, which can be finished to exacting thicknesses and manufactured into a variety of shapes.

Kopp’s band pass filters are used to selectively transmit and absorb wavelength ranges across the visible spectrum. The filters are tailored to produce high transmission at targeted wavelength and colors while absorbing regions to improve performance. Blue filters have been used in a variety of applications such as photography, astronomy, photometers, and in electronic sorting machines. Blue-green and green filters are commonly used in electronic applications, such as in aviation instrumentation panels and in applications to help correct sensor response. These filters are highly useful for limiting the red and infrared response of sensors. While, amethyst bandpass filters have been used for diverse applications such as medical illumination and color correction of light sources with strong green and yellow signatures.

Click here to view Blue Bandpass Filter Glass data.

Click here to view Blue-Green Bandpass Filter Glass data.

Click here to view Green Bandpass Filter Glass data.

Click here to view Amethyst Bandpass Filter Glass data.
Our sharp-cut yellow, orange and red borosilicate filter glasses exhibit low thermal expansion characteristics and offer excellent durability in many applications. These glasses can be tailored for specific “cut-off” wavelengths with high transmission at longer wavelengths and full absorption at shorter wavelengths. Longpass filters are useful for sorting applications, food and beverage inspection, imaging systems, machine vision, and sensing applications.

Click here to view Yellow Longpass filter data.

Click here to view Orange Longpass Filter Glass data.

Click here to view Red Longpass Filter Glass data.
Click here to view Rare-earth Doped Calibration Filter Glass data.

These filter glasses are commonly used as a standard for wavelength calibration of spectrophotometers or absorption of specific wavelengths. The filters have absorption bands that cover a wide range of wavelengths from the UV region (< 250nm) to the near infrared region (> 1.5nm).

Click here to view Uranium Yellow Filter Glass data.

Most glasses have the capability to fluoresce to some extent when irradiated with energy. Our uranium doped glass exhibits a consistent yellow-green fluorescence when exposed to UV light and is useful for fluorescence microscopy.
Click here to view Black Filter Glass data.

This filter glass is nearly opaque to all radiations between 200 nm and 5 µm when used at 1.5 - 4.1 mm thickness. This glass is useful for direct viewing of extremely high-intensity light sources such as the sun and some arc lamps as well as in calibration processes requiring full absorption.

Click here to view Neutral Density Filter Glass data.

Neutral density filters evenly absorb light across the visible spectrum. They’re used to reduce transmittance of light in industrial and imaging applications. Lasers or other high intensity light sources can also cause damage to sensitive sensors and they may need to be attenuated with a neutral density filter. An excess of light can also cause over-exposure in imaging applications. Neutral density filters are also used to test the photometric accuracy of instruments such as spectrometers.
Click here to view Daylight Blue Color Correcting Filter Glass data.

If a light source appears too warm or too cool, it can significantly alter the perception of colors and the environment. A color correction filter adjusts the effective color temperature of the light system and can produce light with a correlated color temperature of 5500, 6500, or 7500°K. We have two standard offerings but can also develop custom correction filters for specific light sources and applications.
Kopp has a range of infrared (IR) absorbing and transmitting filters that can be tailored to your needs. Our IR longpass filters absorber shorter UV and visible wavelengths, while transmitting longer IR wavelengths. These filters have been used in aerospace, military, and sensor applications to provide improved signal to noise readings or even provide covert illumination sources for defense purposes. Our IR absorbing glasses have typical wide pass spectrums in the visible region while absorbing the IR region. These glasses are commonly called heat absorbing glasses as they can be used to absorb the IR or heat signature from light sources. Additionally, these filters have been used to improve sensor response by suppressing IR flooding and interference.

Click here to view IR Bandpass Filter Glass data.

Click here to view IR Longpass Filter Glass data.
Click here to view UV Bandpass Filter Glass data.

Our ultraviolet (UV) bandpass glasses are engineered to exhibit high transmittance in the UV-A, UV-B, or UV-C regions. These filters appear nearly black as they absorb almost all visible radiation but actually provide high transmission in the UV wavelengths of light. They are the preferred material for a wide range of applications, such as non-destructive testing equipment, tanning and phototherapy devices, forensic detection and analysis equipment, and theatrical lighting. We have filters that are tailored to industry applications with many of our glasses targeting high transmission at 254 nm and 365 nm.

Click here to view UV Longpass Filter Glass data.

Our ultraviolet (UV) longpass glasses feature high transmission across the UV and visible spectrum with tailored transmission cut-offs ranging from 240 nm to 400 nm. Their high transmission in the visible region provides the glass with a clear, colorless appearance and tint. In many applications, such as in UV curing, high transmission is necessary to increase throughput and improve quality. These glasses have been designed to meet common industry requirements, but we also have the capability to customize compositions for emerging technologies and applications.