US 12,326,566 B1
Secondary reflection compensation
Mikko Strandborg, Hangonkylä (FI); and Urho Konttori, Helsinki (FI)
Assigned to Distance Technologies Oy, Helsinki (FI)
Filed by Distance Technologies Oy, Helsinki (FI)
Filed on Jan. 14, 2025, as Appl. No. 19/020,182.
Application 19/020,182 is a continuation in part of application No. 18/818,876, filed on Aug. 29, 2024, granted, now 12,260,506.
Int. Cl. G02B 27/01 (2006.01); G02B 27/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0093 (2013.01); G02B 2027/0132 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/014 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a display unit;
an optical combiner arranged on an optical path of the display unit and on an optical path of a real-world light field of a real-world environment; and
at least one processor configured to:
obtain an image to be displayed;
obtain a relative location of eyes of at least one user with respect to a semi-reflective surface of the optical combiner;
for a given region of the image, determine a corresponding portion of the semi-reflective surface of the optical combiner from which light rays of the given region of the image are to be reflected towards the eyes of the at least one user during display of the image, based on a relative position and orientation of the semi-reflective surface of the optical combiner with respect to an image plane of the display unit, a position of the given region in the image, and the relative location of the eyes of the at least one user with respect to the semi-reflective surface of the optical combiner;
for the corresponding portion of the semi-reflective surface of the optical combiner, determine a secondary reflection intensity of light rays of another region of the image that are to undergo secondary reflection from a corresponding portion of another surface of the optical combiner, the another surface being opposite to the semi-reflective surface;
increase a minimum intensity level of pixels in the image;
adjust intensity values of pixels in the given region of the image, based on the secondary reflection intensity determined for the corresponding portion of the semi-reflective surface of the optical combiner; and
display the image via the display unit for producing a synthetic light field, wherein the optical combiner is employed to reflect the synthetic light field towards the eyes of the at least one user, whilst optically combining the synthetic light field with the real-world light field.