US 11,656,452 B2
Apparatus for optical see-through head mounted display with mutual occlusion and opaqueness control capability
Chunyu Gao, Tucson, AZ (US); Yuxiang Lin, Tucson, AZ (US); and Hong Hua, Tucson, AZ (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Dec. 18, 2020, as Appl. No. 17/127,316.
Application 16/196,886 is a division of application No. 15/977,593, filed on May 11, 2018, granted, now 10,175,491, issued on Jan. 8, 2019.
Application 15/977,593 is a division of application No. 15/833,945, filed on Dec. 6, 2017, granted, now 10,048,501, issued on Aug. 14, 2018.
Application 15/833,945 is a division of application No. 15/607,335, filed on May 26, 2017, granted, now 9,874,752, issued on Jan. 23, 2018.
Application 15/607,335 is a division of application No. 15/277,887, filed on Sep. 27, 2016, granted, now 9,726,893, issued on Aug. 8, 2017.
Application 15/277,887 is a division of application No. 13/857,656, filed on Apr. 5, 2013, granted, now 9,547,174, issued on Jan. 17, 2017.
Application 17/127,316 is a continuation of application No. 16/558,241, filed on Sep. 2, 2019, granted, now 10,901,221.
Application 16/558,241 is a continuation of application No. 16/196,886, filed on Nov. 20, 2018, granted, now 10,451,883, issued on Oct. 22, 2019.
Claims priority of provisional application 61/620,581, filed on Apr. 5, 2012.
Claims priority of provisional application 61/620,574, filed on Apr. 5, 2012.
Prior Publication US 2021/0373338 A1, Dec. 2, 2021
Int. Cl. G02B 26/00 (2006.01); G02F 1/01 (2006.01); G02B 27/01 (2006.01); G02B 13/06 (2006.01); G02B 27/10 (2006.01); G02B 27/14 (2006.01); G02B 27/28 (2006.01); G03B 37/02 (2021.01); G02B 5/04 (2006.01); G02B 25/00 (2006.01); H04N 23/45 (2023.01); H04N 23/698 (2023.01); H04N 5/225 (2006.01); H04N 5/232 (2006.01); G06T 19/00 (2011.01)
CPC G02B 26/00 (2013.01) [G02B 5/04 (2013.01); G02B 13/06 (2013.01); G02B 25/001 (2013.01); G02B 27/0172 (2013.01); G02B 27/1066 (2013.01); G02B 27/144 (2013.01); G02B 27/283 (2013.01); G03B 37/02 (2013.01); H04N 23/45 (2023.01); H04N 23/698 (2023.01); G02B 2027/015 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0145 (2013.01); G06T 19/006 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A head-mounted display, comprising:
a. a front layer
b. a back layer
c. a micro display for generating an image, the microdisplay having a virtual view path associated therewith;
d. a reflection-type spatial light modulator for modifying the light from an external scene in the real world to block portions of the see-through view that are to be occluded, the spatial light modulator having a see-through path associated therewith;
e. an objective optics, facing an external scene, configured to receive the incoming light from the external scene and to focus the light upon the spatial light modulator where the objective optics is a one-reflection freeform prism comprising three optical freeform surfaces: refractive surface, reflective surface and refractive surface;
f. a beamsplitter configured to merge a digitally generated virtual image from a microdisplay and a modulated see-through image of an external scene passing from a spatial light modulator, producing a combined image;
g. an eyepiece configured to magnify the combined image, where the eyepiece is a one-reflection freeform prism comprising three optical freeform surfaces: refractive surface, reflective surface and refractive surface;
h. an exit pupil configured to face the eyepiece, light from the eyepiece passing through the exit pupil whereupon the user observes the combined view of the virtual and see-through views in which the virtual view occludes portions of the see-through view;
i. a roof mirror configured to reflect light from the external scene into the objective optics, where the roof mirror adds an additional reflection to revert the see-through view so as to maintain the parity between the external scene and the see-through view presented to the viewer.