US 12,169,295 B2
Micro-layered multi-phase lens design and optical system for enhanced pepper's ghost projection and other optical projections
Taylor Scott Griffith, San Diego, CA (US)
Assigned to IKIN, Inc., Dripping Springs, TX (US)
Filed by IKIN, Inc., San Diego, CA (US)
Filed on Dec. 23, 2021, as Appl. No. 17/560,963.
Claims priority of provisional application 63/130,191, filed on Dec. 23, 2020.
Prior Publication US 2022/0196894 A1, Jun. 23, 2022
Int. Cl. G02B 5/08 (2006.01); G03B 21/56 (2006.01)
CPC G02B 5/0816 (2013.01) [G03B 21/56 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A micro-layered structure for use in an optical projection system, the micro-layered structure comprising:
a first semi-reflective transparent layer having a first index of refraction, the first semi-reflect transparent layer having a first front surface and a first rear surface;
a second semi-reflective transparent layer having a second index of refraction different from the first index of refraction, the second semi-reflect transparent layer having a second front surface and a second rear surface, the second front surface abutting the first rear surface of the first semi-reflective transparent layer;
wherein the micro-layered structure is configured to reflect incident light as multiple reflections;
wherein a first portion of the incident light is reflected by the first front surface as a first reflection, a second portion of the incident light is reflected by the first rear surface as a second reflection, a third portion of the incident light is reflected by the second front surface as a third reflection and a fourth portion of the incident light is reflected by the second rear surface as a fourth reflection;
wherein the first reflection, the second reflection, the third reflection and the fourth reflection collectively form a projection of the image wherein the projection of the image is perceived by a user of the optical projection system to be located behind the micro-layered structure.