Flat panel display production requires accurate metrology at every step of the process. 4D PhaseCam interferometers have been designed to measure flatness and defects on glass substrates, while 4D FlexCam and NanoCam measure surface roughness and defects. You can also use PolarCam snapshot micropolarizer cameras to inspect polarization quality of polarizer films.
FlexCam —a compact, optical surface profiler— can measure roughness and quantify defects on web presses at up to 1 meter/min, enabling real-time monitoring and control of roughness to less than 0.5 nm rms. FlexCam also identifies and quantifies defects, registering their position within the roll. The system provides accurate measurement without vibration isolation, despite runout and web flutter.
Added Technical Resources
Measurement of Space Optics and Structures
This paper presents an overview of the techniques and configurations used to build dynamic interferometers and measurement results for a variety of space-based optical components.
Vibrational Characteristics of Light-weight Mirrors
We present a technique to characterize and quantitatively measure the vibrational mode shapes and amplitudes of mirrors concurrently with surface figure testing..
Products for Displays
PhaseCam IR Interferometers
Compact, lightweight and vibration-insensitive for accurate surface and wavefront measurements at near infrared (1.053, 1.064, 1.3 and 1.55 micron) wavelengths.
NanoCam Sq systems measure surface roughness on coated and uncoated flats to ensure the quality of polishing processes.
PolarCam Polarization Cameras
Measure stress-induced birefringence on lenses, glass, bottles and more.
Do you need custom-built metrology?
Get a free consultation. 4D Technology’s mechanical, optical, electrical and software engineering teams are standing by to evaluate what it would take to meet your application’s requirements.