US 12,245,811 B2
Methods and systems for thickness measurements using spectrally resolved full gradient topography
Thomas D. Raymond, Edgewood, NM (US); Daniel R. Neal, Tijeras, NM (US); and Richard J. Copland, Albuquerque, NM (US)
Assigned to AMO Development, LLC, Irvine, CA (US)
Filed by AMO Development, LLC, Irvine, CA (US)
Filed on Apr. 15, 2021, as Appl. No. 17/232,064.
Prior Publication US 2022/0330813 A1, Oct. 20, 2022
Int. Cl. A61B 3/10 (2006.01); A61B 3/02 (2006.01); A61B 3/12 (2006.01); A61B 3/14 (2006.01)
CPC A61B 3/101 (2013.01) [A61B 3/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
projecting a plurality of light spots onto an eye including a cornea having a tear film disposed thereon, wherein the light spots are broadband light spots having a broad bandwidth, or are narrowband light spots whose bandwidth is tuned in time across a broad bandwidth, wherein the broad bandwidth is a frequency band whose full width at half maximum (FWHM) bandwidth is at least 40% of a center frequency of the frequency band;
imaging the light spots from the eye onto at least one two-dimensional detector array;
spectrally resolving each of the plurality of imaged light spots; and
performing interferometry on the spectrally resolved imaged light spots to determine a thickness of the tear film between an anterior interface and a posterior interface of the tear film.