US 12,320,749 B2
Multi-mode illumination system
Ji Qi, Hillsborough, NJ (US); Stephen Y. Chou, Princeton, NJ (US); and Wei Ding, Princeton, NJ (US)
Assigned to Essenlix Corporation, Monmouth Junction, NJ (US)
Filed by Essenlix Corporation, Monmouth Junction, NJ (US)
Filed on Feb. 22, 2024, as Appl. No. 18/584,021.
Application 18/584,021 is a continuation of application No. 17/985,654, filed on Nov. 11, 2022, granted, now 11,927,533.
Application 17/985,654 is a continuation of application No. 17/424,131, granted, now 11,543,353, previously published as PCT/US2020/018290, filed on Feb. 14, 2020.
Claims priority of provisional application 62/794,333, filed on Jan. 18, 2019.
Prior Publication US 2024/0192137 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/64 (2006.01)
CPC G01N 21/6428 (2013.01) [G01N 21/6458 (2013.01); G01N 2021/6439 (2013.01); G01N 2201/021 (2013.01); G01N 2201/0634 (2013.01); G01N 2201/0636 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A dual-mode illumination system for illuminating a sample, comprising:
(a) a first illumination module, comprising:
a right-angle prism; and
a first light source oriented toward the right-angle prism, wherein the right-angle prism reflects or redirects light emitted from the first light source toward the sample; and
(b) a second illumination module, comprising:
a light extraction plate that comprises a light scattering structure on a surface thereof;
a second light source configured to emit light into the light extraction plate;
a second optical filter; and
a light diffuser film disposed between the second optical filter and the light extraction plate,
wherein the light diffuser film is configured to filter the extracted non-coherent light and provide a more uniform non-coherent light distribution over a surface area of the light extraction plate.