Which device is used to verify if a display system meets a specified contrast ratio?

A spot photometer is a specialized device used to measure the intensity of light and can be employed to assess the contrast ratio of a display system. To determine if a display meets specific contrast ratio requirements, the spot photometer measures the luminance of both the brightest and darkest points on the screen. The contrast ratio is then calculated by comparing these two values, providing a quantitative assessment of the display's performance.

This capability is crucial when evaluating display systems in professional environments, where accurate color reproduction and visual clarity are paramount. A spot photometer's focused measurement allows for precise readings in specific areas of the display, making it a reliable tool for verifying the contrast ratio, unlike general measurement tools or concepts that do not provide specific light intensity readings directly related to contrast evaluation.