Patent ID: 11960101
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical measurement device comprising:
an optical system that focuses emitted light that is emitted from a measurement surface of a light emitting electronic display or a light emitting surface of which a sparkle contrast is to be measured;
a two-dimensional sensor array having a two-dimensional sensor array surface on which the emitted light is focused, the two-dimensional sensor array capturing an image of the emitted light; and
a calculation unit that calculates the sparkle contrast based on the image of the emitted light captured under an imaging condition under which a size of a light-emitting region on the measurement surface is constant, the light-emitting region contributing to formation of a diffraction limited spot of the emitted light on the two-dimensional sensor array surface,
wherein the size of the light-emitting region is determined based on a size of the diffraction limited spot and a magnification of the optical system determined by a focal length of the optical system and an imaging distance from the measurement surface to the optical system.