Applications for colored optical filters include contrast enhancement for monochrome displays (e.g., VF, EL, LEDs) via a color selective band pass or long pass filter aligned with the peak wavelength output of the display. Long pass filters are used to improve contrast and performance of optical scanners and red, yellow, and amber LEDs. Neutral density and triple notch filters and polarizers improve contrast of LCDs, OLEDs, and other full color displays by attenuating internal reflections and producing a greater delta between the display’s RGB output and the background.
Contrast Enhancement
Band Rejection
Dontech colored filters are made with optical substrates including acrylic, polycarbonate, and glass. The coloring is produced by bulk loading the substrates with absorptive materials as an alternative technology to dichroic filters which are created by depositing a thin film coating that passes or rejects specific wavelengths of the visible, infrared, and/or near infrared spectrums. Dontech manufactures custom-colored filters utilizing many standard and custom colors and substrates.
Dontech has extensive engineering and technical support resources that can assist you with your colored optical filter design needs. Our technical staff have diverse backgrounds relevant to high-performance display and precision optics markets. For many of our top customers, we function as an extension of their engineering departments, supporting projects from concept to final system delivery. We will integrate our optical filters (OFED) and other enhancing components into touchscreens (DTS), displays (DES) and systems to the level that is needed by our customers.
Since 1971, we have been creating components to improve the performance of optical systems, supporting our customers from concept to final system delivery. Dontech engineers, manufactures and integrates custom parts for optical, electronic display, touchscreen, and optical and electronic assembly markets. We also produce functional coatings for components used on satellites and interplanetary spacecraft. We manufacture optical filters, laminations, thin and thick film coatings, precision conductive optical grids, electronic traces, and other enhancements to service the military, avionics, aerospace, medical, industrial and government markets.
We are proud of the partnerships we build with our customers, and we are ready to use our expertise to support your program. Dontech’s Quality Management System is AS9100D and ISO-9001:2015 certified with TUV Rheinland of North America.
