Patent ID: 7834996

Claim:
An apparatus for inspecting a three-dimensional image displaying apparatus having a display and an optical plate disposed at the front of the display, the apparatus comprising: a signal generation unit configured to supply a test pattern to the display to light a pixel corresponding to a predetermined pitch; a first optical element configured to transmit a light from an inspection position of the optical plate on which the test pattern is displayed; a second optical element coaxially disposed on an optical axis of the first optical element, configured to focus the light from the first optical element; an imaging unit configured to obtain an image from the light focused by the second optical element; and an analysis unit configured to calculate a three-dimensional position at the inspection position of the optical plate relative to the display or a predetermined period of the optical plate, from a position and a period of luminance distribution of the image, and a distance between the optical plate and the first optical element, and to inspect whether the three-dimensional position or the predetermined period is within a threshold; wherein the display has pixels two-dimensionally aligned, and the optical plate has an exit pupil array or a lens array aligned at the predetermined pitch.