CPC G02B 19/0061 (2013.01) [G02B 6/003 (2013.01); G02B 6/005 (2013.01); G02B 19/0009 (2013.01); G03H 1/2286 (2013.01); G03H 1/2294 (2013.01); G03H 2001/2234 (2013.01); G03H 2222/12 (2013.01); G03H 2223/16 (2013.01); G03H 2225/22 (2013.01); G03H 2250/38 (2013.01)] | 20 Claims |
1. A holographic display apparatus comprising:
a light source disposed on a printed circuit board;
a display panel diffracting light transferred from the light source;
an optical system that includes a collimation lens disposed between the light source and the display panel;
a condensing lens disposed between the light source and the optical system, and collecting the light transferred from the light source; and
a first mask disposed between the light source and the condensing lens, wherein
the optical system converts the light incident from the light source into a surface light source,
the condensing lens includes a lower portion having a guide protrusion,
the first mask includes a surface having a guide recess, and
the condensing lens and the first mask are aligned by inserting the guide protrusion into the guide recess.
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