What does a spot photometer measure for display systems?

A spot photometer is a specialized device used to measure the brightness of light emitted from a display system at a specific location, making it particularly valuable in ensuring optimal viewing experiences. The primary function of a spot photometer is to quantify brightness levels, typically using units such as nits or candelas per square meter.

By providing precise measurements of brightness in targeted areas of a display, it aids in assessing the consistency and quality of the display output, allowing for adjustments and calibrations to be made as necessary to enhance visual performance. Understanding brightness is crucial when evaluating display systems, as it directly affects visibility and user comfort in various lighting conditions.

The other aspects related to audio levels, contrast ratios, and voltage levels do not pertain to the core function of measurement typically associated with a spot photometer. Specifically, contrast ratios involve the comparison between the brightest and darkest elements of an image, which is a different measurement category entirely, and does not fall under the capabilities of a spot photometer.