US 12,085,500 B2
Reference switch architectures for noncontact sensing of substances
Miikka M. Kangas, Sunnyvale, CA (US); Mark Alan Arbore, Los Altos, CA (US); David I. Simon, San Francisco, CA (US); Michael J. Bishop, San Carlos, CA (US); James W. Hillendahl, Vacaville, CA (US); and Robert Chen, Mountain View, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 20, 2023, as Appl. No. 18/111,740.
Application 18/111,740 is a continuation of application No. 17/063,483, filed on Oct. 5, 2020, granted, now 11,585,749.
Application 17/063,483 is a continuation of application No. 15/751,095, granted, now 10,801,950, issued on Oct. 13, 2020, previously published as PCT/US2016/049330, filed on Aug. 29, 2016.
Claims priority of provisional application 62/213,004, filed on Sep. 1, 2015.
Prior Publication US 2023/0204497 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/27 (2006.01); G01J 3/02 (2006.01); G01J 3/32 (2006.01); G01J 3/36 (2006.01); G01J 3/42 (2006.01); G01J 3/433 (2006.01); G01J 3/447 (2006.01); G01N 21/21 (2006.01); G01N 21/35 (2014.01); G01N 21/47 (2006.01); G01N 21/49 (2006.01)
CPC G01N 21/276 (2013.01) [G01J 3/0286 (2013.01); G01J 3/32 (2013.01); G01J 3/36 (2013.01); G01J 3/42 (2013.01); G01J 3/433 (2013.01); G01J 3/447 (2013.01); G01N 21/35 (2013.01); G01N 21/474 (2013.01); G01N 21/4785 (2013.01); G01N 21/21 (2013.01); G01N 2021/4709 (2013.01); G01N 2021/4778 (2013.01); G01N 21/49 (2013.01); G01N 2201/0221 (2013.01); G01N 2201/12707 (2013.01); G01N 2201/12723 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light measurement system for measuring concentration of a substance, the system comprising:
a light source configured to emit light into a sample;
a lens located at an interface of the system and configured to receive a first portion of the light from a first location within the sample and a second portion of the light from a second location within the sample;
a detector comprising a first detector pixel and second detector pixel; and
an optics unit comprising:
a first optics configured to receive the first portion of the light from the lens and direct the first portion of the light to the first detector pixel; and
a second optics configured to receive the second portion of the light from the lens and direct the second portion of the light to the second detector pixel.