Conoscope Lens for Viewing Angle Performance Measurement

16 Mar 2017

The Radiant Vision Systems conoscope lens enables high-resolution photopic measurement of the angular distribution of color, luminance, and contrast of flat panel displays (FPDs) and display components. RadiantVision Systems utilizes Fourier optics that map an emitting spot to a CCD so that each pixel corresponds to a different emission angle. The conoscope lens captures a full cone of viewing angle data in a single measurement to ±60 degrees. This provides quick, accurate results, making the system ideal for both R&D projects and in-line production quality control. The lens is well-suited to a wide range of display types including those based on LCD and OLED technologies, as well as backlights.

The conoscope lens provides an angular resolution of 0.06 degrees per CCD pixel. Paired with the ProMetric® I16 Colorimeter or Y16 Photometer featuring a 16 megapixel CCD sensor, the conoscope lens has the capability to measure luminance, radiance, angular contrast, CIE chromaticity coordinates, and correlated color temperature (CCT) with a high degree of accuracy at each viewing angle.

The conoscope lens solution simultaneously acquires viewing angle measurements to ±60 degrees with reduced hardware size and complexity compared to typical goniometric measurement systems for R&D applications. A ProMetric camera and lens combination can be purchased for a fraction of the cost of alternative solutions. Because of its speed and compact form factor, the conoscope lens solution is also ideally-suited for in-line inspection of displays during production. This capability enables real-time pass/reject operations based on display viewing angle performance data, eliminating poor-quality components from the line and identifying quality trends before significant materials loss. Using the conoscope lens, Radiant Vision Systems cameras can be applied concurrently in R&D and production environments to capture identical measurements of viewing angle data for seamless evaluation of displays throughout an entire product lifecycle, from initial characterization to quality control.

Accurate, reliable measurement of luminance, chromaticity, and contrast to ±60° viewing angle
Faster than goniometric systems, capturing data for all angles simultaneously
Easily paired with ProMetric imaging colorimeters or photometers
Combination of low cost, high performance, and flexibility, designed for R&D and quality assurance labs or production lines
Easy-to-use measurement control and analysis software

All Radiant Vision Systems cameras feature ProMetric Software, which provides intuitive camera set-up and customizable automated measurement sequences. Extensive data analysis and display functions are also supported, including isometric plots, cross-section graphs, radar plots, bitmaps, and CIE color plots.

The conoscope lens simplifies the process of capturing viewing angle measurements using a single compact camera solution that addresses both off-line and in-line applications: