Apparatus for inspecting display panel and method for inspecting display panel

An apparatus for inspecting a display panel, the apparatus comprising:

• a light source;
• a half mirror directly receiving a source beam from the light source and reflecting, by an upper surface of the half mirror directly facing the light source, a first beam which is a portion of a source beam irradiated from the light source and transmitting a second beam which is another portion of the source beam toward the display panel;
• a reflective mirror reflecting the second beam transmitting the half mirror and the display panel to return to the half mirror;
• a panel supporter supporting the display panel between the half mirror and the reflective mirror;
• a wave plate disposed between the half mirror and the reflective mirror and transmitting the second beam;
• a rotator rotating the wave plate at a predetermined angle;
• and
• an imaging detector directly receiving the first beam from the upper surface of the half mirror and photographing an interference fringe by the first beam and the second beam.