Title:
3D PROJECTION LENS AND PROJECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/086349
Kind Code:
A1
Abstract:
A 3D projection apparatus comprises a light source (301), a color separation and color combination unit, a light modulation unit (401), and a 3D projection lens (308). The 3D projection lens (308) comprises a front lens unit (402), a light splitting unit, a back lens unit, and a liquid crystal component (409). A light splitting portion of the light splitting unit is positioned at an aperture stop (407) of the 3D projection lens (308). The light source (301) emits a beam towards the color separation and color combination unit, which guides the beam to the light modulation unit (401). The light modulation unit (401) modulates the beam from the color separation and color combination unit to form an image light and emits the image light to the 3D projection lens (308). The 3D projection lens (308) receives the image light from the light modulation unit (401) and splits the image light into a first light and a second light, and projects the first light and the second light to a screen (408), wherein the first light and the second light are superimposed to present a 3D effect. By implementing a 3D system in a projection lens, the volume of the 3D system is reduced, thus minimizing the volume of the light splitting unit, avoiding an excessive length from a light modulator to the projection lens and lowering design complexity of lenses.
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Inventors:
LI YI (CN)
HU FEI (CN)
GUO ZUQIANG (CN)
HU FEI (CN)
GUO ZUQIANG (CN)
Application Number:
PCT/CN2017/088629
Publication Date:
May 17, 2018
Filing Date:
June 16, 2017
Export Citation:
Assignee:
APPOTRONICS CHINA CORP (CN)
International Classes:
G02B30/25; G03B35/22; G03B35/26
Foreign References:
| CN206193432U | 2017-05-24 | |||
| US20080225236A1 | 2008-09-18 | |||
| CN102301275A | 2011-12-28 | |||
| CN102402018A | 2012-04-04 | |||
| CN103827745A | 2014-05-28 | |||
| US20110205495A1 | 2011-08-25 |
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