Optical device components
View Patent ↗Embodiments of the invention relate to an apparatus including a light source to generate a plurality of light beams with each of the plurality of light beams having a different wavelength range. The apparatus also includes a light funnel to direct the plurality of light beams to the target area, an aperture to direct the plurality of light beams emitting from the target area to a lens, the lens configured to collect the light beams emitting from the target area. Further, the apparatus includes a detector including a plurality of light-sensing devices each configured to detect a light beam and configured to generate an output signal indicative of an intensity of light detected and a processor for determining the blood characteristic as a function of each generated output signal.
1. An apparatus, comprising:
a light source to generate a plurality of light beams, each of the plurality of light beams having a different wavelength range;
a light funnel, of frusto-conical shape, to collect the plurality of light beams through an entrance opening having a first diameter and to direct the plurality of light beams to a target area through an exit opening having a second diameter, wherein the second diameter is less than the first diameter;
an aperture to direct the plurality of light beams emitting from the target area;
a lens configured to collect the plurality of light beams directed from the aperture;
a detector comprising a plurality of light-sensing devices each configured to detect a light beam passing through the lens and configured to generate an output signal indicative of an intensity of light detected; and
a processor for determining a blood characteristic as a function of each generated output signal.
2. The apparatus of claim 1 , further comprising a plurality of interference filters each configured to pass a different one of the plurality of light beams emitting from the target area as a function of wavelength range, wherein the plurality of interference filters are positioned between the lens and the detector.
3. The apparatus of claim 2 , further comprising a transmission grating, positioned between the lens and the detector.
4. The apparatus of claim 1 , wherein the light source comprises one or more light emitting diodes.
5. The apparatus of claim 1 , wherein the light source comprises one or more incandescent light sources.
6. The apparatus of claim 1 , wherein the wavelength range comprises differing wavelength ranges between about 800 nm and about 1600 nm.
7. The apparatus of claim 1 , wherein the light source is positioned at the entrance opening of the light funnel.
8. An apparatus, comprising:
a light source to generate a plurality of light beams, each of the plurality of light beams having a different wavelength range;
a light funnel, of frusto-conical shape, to collect the plurality of light beams through an entrance opening having a first diameter and to direct the plurality of light beams to a target area through an exit opening having a second diameter, wherein the second diameter is less than the first diameter;
an aperture to direct the plurality of light beams emitting from the target area;
a lens to collect the plurality of light beams directed from the aperture;
one or more detectors each configured to detect a light beam passing through the lens and configured to generate an output signal indicative of an intensity of light detected;
one or more filters positioned between the lens and the detector; and
a processor for determining a blood characteristic as a function of each generated output signal.
9. The apparatus of claim 8 , further comprising a transmission grating, positioned between the lens and the one or more filters.
10. The apparatus of claim 8 , wherein the one or more filters are interference filters.
11. The apparatus of claim 10 , wherein the one or more interference filters are each configured to pass a different one of the plurality of light beams emitting from the target area as a function of wavelength range.
12. The apparatus of claim 8 , wherein the one or more detectors are positioned near or in contact with the one or more filters.
13. The apparatus of claim 8 , wherein the one or more detectors comprises a detector array.
14. The apparatus of claim 8 , wherein the plurality of light beams is generated from incandescent light sources.
15. The apparatus of claim 8 , wherein the plurality of light beams is generated from infrared emitting diodes.