US 12,085,740 B2
Tunable diffractive optics
Sebastien Bolis, Crolles (FR); and Nachiappan Chidambaram, Grenoble (FR)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 13, 2021, as Appl. No. 17/228,740.
Claims priority of provisional application 63/030,938, filed on May 28, 2020.
Prior Publication US 2021/0373210 A1, Dec. 2, 2021
Int. Cl. G02B 5/18 (2006.01); G02B 27/42 (2006.01)
CPC G02B 5/1828 (2013.01) [G02B 27/4233 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical component, comprising:
a transparent substrate comprising diffractive optical element (DOE), which is configured to apply a diffractive effect to optical radiation transmitted through the substrate;
a transparent piezoelectric film formed on the substrate and configured to deform in response to an actuation voltage applied thereto into a pattern of peaks and troughs configured to deflect optical radiation that is incident thereon, the pattern having an amplitude determined by the actuation voltage, such that buckling of the piezoelectric film modifies the diffractive effect applied by the DOE to the transmitted optical radiation; and
electrodes configured to apply the actuation voltage to at least one surface of the piezoelectric film.