Multi-focus focusing physiological sensing device

Abstract

The invention discloses a multi-focus focusing physiological sensing device, comprising at least one multi-focus concentrator, the multi-focus concentrator has at least one first elliptical reflector, and at least one second elliptical reflector is provided at one end thereof, The first elliptical reflector has a first transparent plane with a first focus on it, the second elliptical reflector has a second transparent plane with at least two second focal points on it, the first elliptical reflector and the second There is a first confocal point at the junction of the elliptical reflector; at least two light-emitting elements are respectively placed at the two second focal points to generate a light source, so that the light from the two light sources is converged at the first confocal point by the second elliptical reflector, and is incident to the measured object to reflect the light source to be measured back to the first confocal point, reflected by the first elliptical reflector, and then emitted from the first focal point to the sensor to detect the physiological state. The invention can increase the light-gathering intensity and expand the light-receiving range, and can simultaneously use light sources with multiple wavelengths.

Description

technical field [0001] The invention relates to a physiological detection device, in particular to a multi-focus focusing physiological sensing device capable of effectively focusing light. Background technique [0002] With the advancement of science and technology, the development of wearable physiological detection devices, such as physiological sensing watches, has gradually emerged in recent years. Generally, most of the existing technologies adopt the optical detection method, using a light-emitting element to generate a light source, injecting the light source onto the skin to be tested, sensing the light signal reflected by the skin, and analyzing the light intensity changes of different wavelength light sources after passing through the physiological tissue. The signal calculates physiological values ​​such as heart rate, blood oxygen, and blood sugar. However, if the intensity of the light source is not enough during measurement, the light source cannot penetrate t...

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Problems solved by technology

However, the previous case did not mention that the curvature of the reflective surface of the concave mirror can be adjusted to improve the light-gathering effect

In addition, since the measurement of multiple signals requires at least 2-3 light sources of different wavelengths for processing and sensing, the structure of the previous proposal cannot simultaneously use light sources of multiple wavelengths to detect different physiological signals, so the previous proposal cannot achieve The purpose of measuring physiological signals such as heart rate, blood oxygen and blood sugar at the same time

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