Westboro Photonics

Conometer® Viewing Angle Lens

Measure viewing angle performance of flat panel displays

WP’s Conometer lens is a conoscopic lens using Fourier optics to enable luminance and chromaticity measurements of flat panel displays out to +/-80 degrees from normal (160 degrees full angle). A spectral measurement at the center of the field of view can also be acquired to improve the system’s accuracy.

The calibrated system provides accurate and reliable measurements of many parameters as a function of viewing angle including luminance, chromaticity, contrast, gamma and gamma inversion, and more.

Conometer Viewing Angle Lens with WP525 Imaging Spectral Colorimeter

Photometrica software images of a color viewing angle measurement taken with the Conometer Lens.

AOIs at certain viewing angle locations plotted in color space 

Profile lines showing luminance as a function of viewing angle for red, green, blue, and white measurements.

Luminance image

 Visit our website for more information about Photometrica® software capabilities to measure and analyze the viewing angle properties of displays.

Compatible Colorimeters


Key Features
  • Up to ± 80° (160° total)
  • 0.001 cd/m2 sensitivity
  • Faster than goniometric measurements
  • Spectroradiometer integration
Typical Applications
  • Viewing angle measurements of flat panel displays
Wide Viewing Angle