Multi-focus physiologic sensing device for condensing light

• US 9,980,654 B2
• Filed: 12/17/2015
• Issued: 05/29/2018
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: Automotive Research & Testing Center
• Original Assignee: Automotive Research & Testing Center
• Inventors: Cheng, Shun-Wen, Shih, Chun-Yao, Hsu, Jih-Tao
• Primary Examiner(s): Ratcliffe, Luke D
• Application Number:
  US14/972,691
• Publication Number:
  US 20170172422A1
• Time in Patent Office: 894 Days
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/6825 Hand
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal

Abstract

A multi-focus physiologic sensing device for condensing light is disclosed, comprises a multi-focus condenser has one first ellipse reflection member, and one second ellipse reflection member is arranged at an end of the first ellipse reflection member. The first ellipse reflection member has a first focus point thereon. The second ellipse reflection member has two second focus points thereon. A boundary between the first ellipse reflection member and the second ellipse reflection member has a first confocal point. Two lighting elements are respectively arranged on the two second focus points to generate light sources, that focus light on the first confocal point through the second ellipse reflection member, and then the detected object reflects the detected light source back to the first confocal point. Then, the detected light source is passes through the sensor from the first focus.

Claims

1. A multi-focus physiologic sensing device for condensing light comprising:

at least two lighting elements each generating a light source;

at least one multi-focus condenser having at least one first ellipse reflection member and at least one second ellipse reflection member, and said second ellipse reflection member is arranged at an end of said first ellipse reflection member, and said first ellipse reflection member has a first transparent plane and a first focus point thereon, and said second ellipse reflection member has a second transparent plane and at least two second focus points thereon, and a boundary between said first ellipse reflection member and said second ellipse reflection member has a first confocal point, and said two lighting elements are respectively arranged on said two second focus points to generate said two light sources, and said two light sources focus light on said first confocal point through said second ellipse reflection member whereby said light is incident on a detected object to form a detected light source, and then said detected object reflects said detected light source back to said first confocal point whereby said detected light source is emitted exit from said first focus point after reflection; and

at least one sensor arranged on said first focus point of said multi-focus condenser and receiving said detected light source to detect a physiologic state.

2. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said second ellipse reflection member of said multi-focus condenser further comprises two first ellipse reflection parts, and an end of each of said first ellipse reflection parts has one of said second focus points.

3. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said first ellipse reflection member and said second ellipse reflection member are integrally formed.

4. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said detected object is arranged on said first confocal point.

5. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said second ellipse reflection member is tilted upward with respect to said first ellipse reflection member.

6. The multi-focus physiologic sensing device for condensing light of claim 5, wherein said second ellipse reflection member is inclined at an angle of 1˜

15 degrees.

7. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said second ellipse reflection member further comprises two first ellipse reflection parts and a second ellipse reflection part, and each of said first ellipse reflection parts has said second transparent plane and one of said second focus points thereon, and said second ellipse reflection part has a third transparent plane and a second confocal point, and said second ellipse reflection part is arranged at an end of said first ellipse reflection member, and said two first ellipse reflection parts are inversely arranged on said second ellipse reflection part to connect said second transparent planes with said third transparent plane, and said second focus points respectively receive said light sources to pass said light sources into said first ellipse reflection parts, and then said first ellipse reflection parts focus said light sources on said second confocal point, and then reflect said light sources to said first ellipse reflection member, and said light sources are passes through said detected object from said first confocal point.

8. The multi-focus physiologic sensing device for condensing light of claim 7, wherein a curved surface of each of said first ellipse reflection parts is identical to a curved surface of said second ellipse reflection part.

9. The multi-focus physiologic sensing device for condensing light of claim 2, wherein said lighting elements are arranged on said two second focus points of said second ellipse reflection member.

10. The multi-focus physiologic sensing device for condensing light of claim 7, wherein said lighting elements are arranged on said two second focus points of said second ellipse reflection member.

11. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said lighting elements are red light lighting elements, green light lighting elements, or infrared light lighting elements.

12. The multi-focus physiologic sensing device for condensing light of claim 1, wherein said lighting elements are light emitting diodes (LEDs), surface-mounted-device light-emitting diodes (SMD LEDs), or laser diodes (LDs).

13. The multi-focus physiologic sensing device for condensing light of claim 1, further comprising a casing encasing said lighting elements, said multi-focus condenser and said sensor and exposing said first confocal point.

14. The multi-focus physiologic sensing device for condensing light of claim 11, wherein said infrared light lighting elements emit light having a wavelength of 1000 nm˜

1700 nm, and said green light lighting elements emit light having a wavelength of 500 nm˜

560 nm, and said red light lighting elements emit light having a wavelength of 600 nm˜

700 nm or 900 nm˜

1000 nm.

15. The multi-focus physiologic sensing device for condensing light of claim 11, wherein said infrared light lighting elements are used to measure blood sugar, and said green light lighting elements are used to measure a heart rate, and said red light lighting elements are used to measure blood oxygen.