US 12,011,263 B2
Integrated optical filter system with low sensitivity to high angle of incidence light for an analyte sensor
Joshua C. Schaefer, Germantown, MD (US); Andrew DeHennis, Germantown, MD (US); and Szymon Tankiewicz, Germantown, MD (US)
Assigned to Senseonics, Incorporated, Germantown, MD (US)
Filed by Senseonics, Incorporated, Germantown, MD (US)
Filed on Mar. 1, 2021, as Appl. No. 17/188,817.
Application 17/188,817 is a continuation of application No. 16/698,041, filed on Nov. 27, 2019, granted, now 10,932,703.
Application 16/698,041 is a continuation of application No. 14/799,979, filed on Jul. 15, 2015, granted, now 10,537,269, issued on Jan. 21, 2020.
Claims priority of provisional application 62/024,595, filed on Jul. 15, 2014.
Prior Publication US 2021/0177311 A1, Jun. 17, 2021
Int. Cl. A61B 5/1455 (2006.01); A61B 5/145 (2006.01); A61B 5/1459 (2006.01)
CPC A61B 5/1455 (2013.01) [A61B 5/14532 (2013.01); A61B 5/1459 (2013.01); A61B 2562/0233 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first low angle sensitive (LAS) optical filter comprising layers configured to:
prevent light having a wavelength outside a first band pass region from reaching a first photodetector,
permit light reaching the first LAS optical filter at a first angle of incidence and having a wavelength within the first band pass region to pass to the first photodetector at a first transmission percentage, and
permit light reaching the first LAS optical filter at a second angle of incidence higher than the first angle of incidence and having a wavelength within the first band pass region to pass to the first photodetector at a second transmission percentage, wherein the second angle of incidence is greater than or equal to 40 degrees, and the second transmission percentage is lower than the first transmission percentage and greater than zero; and
a second LAS optical filter comprising layers configured to:
prevent light having a wavelength outside a second band pass region from reaching a second photodetector, wherein the second band pass region is different than the first band pass region,
permit light reaching the second LAS optical filter at the first angle of incidence and having a wavelength within the second band pass region to pass to the second photodetector at a third transmission percentage, and
permit light reaching the second LAS optical filter at the second angle of incidence and having a wavelength within the second band pass region to pass to the second photodetector at a fourth transmission percentage, wherein the fourth transmission percentage is lower than the third transmission percentage and greater than zero.