US 12,078,821 B2
Optical products, masters for fabricating optical products, and methods for manufacturing masters and optical products
Christopher Chapman Rich, Rancho Palos Verdes, CA (US); Phillip Christopher Harvey, Long Beach, CA (US); and Joel Mikael Petersen, Valley Village, CA (US)
Assigned to WAVEFRONT TECHNOLOGY, INC., Paramount, CA (US)
Filed by WAVEFRONT TECHNOLOGY, INC., Paramount, CA (US)
Filed on Oct. 15, 2020, as Appl. No. 17/071,872.
Application 17/071,872 is a continuation of application No. 14/921,933, filed on Oct. 23, 2015, granted, now 10,859,851.
Claims priority of provisional application 62/068,540, filed on Oct. 24, 2014.
Prior Publication US 2021/0271105 A1, Sep. 2, 2021
Int. Cl. G02B 30/40 (2020.01); B42D 25/29 (2014.01); B42D 25/324 (2014.01); B42D 25/328 (2014.01); G02B 5/04 (2006.01); G03H 1/00 (2006.01)
CPC G02B 30/40 (2020.01) [B42D 25/29 (2014.10); B42D 25/324 (2014.10); B42D 25/328 (2014.10); G02B 5/045 (2013.01); G03H 1/0011 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical product configured, when illuminated, to reproduce by reflected or refracted light, an image that appears 3D of at least a part of a 3D object, said optical product comprising:
a first surface; and
a second surface opposite said first surface, said second surface comprising a plurality of portions, each portion corresponding to a point on a surface of said 3D object, each portion comprising one or more non-holographic features configured to produce at least part of said image without relying on diffraction or Fresnel lenses at viewing angles through a range of angles of 20 degrees to 160 degrees relative to a plane of the optical product as the optical product is tilted,
wherein a gradient in said non-holographic features correlates to an inclination of said surface of said 3D object at said corresponding point,
wherein an orientation of said non-holographic features correlates to an orientation of said surface of said 3D object at said corresponding point, and
wherein said one or more non-holographic features comprise non-linear saw tooth shaped facets when viewed in a cross-section orthogonal to said first and second surfaces.