Non-protruding optoelectronic lens
First Claim
1. An optoelectronic device for contacting biological tissue, the optoelectronic device comprising:
- an encapsulant having a surface;
a lens comprising a lens portion of said surface of the encapsulant;
a trough in said encapsulant disposed around said lens portion;
a filler portion having a generally smooth surface disposed around said lens, wherein said generally smooth surface contacts the biological tissue and said lens does not protrude substantially beyond said generally smooth surface; and
an optoelectronic element embedded in said encapsulant and operable at at least one wavelength of light, said lens configured to transmit or receive or both transmit and receive said at least one wavelength.
7 Assignments
0 Petitions
Accused Products
Abstract
An optoelectronic component has a lens that is formed in the surface of an encapsulant surrounding a semiconductor diode element. With respect to emitters, the lens reduces internal reflection and reduces dispersion to increase overall efficiency. With respect to detectors, the lens focuses photons on the active area of the detector, increasing detector sensitivity, which allows a detector having a reduced size and reduced cost for a given application. The lens portion of the encapsulant is generally non-protruding from the surrounding portions of the encapsulant reducing contact surface pressure caused by the optoelectronic component. This non-protruding lens is particularly useful in pulse oximetry sensor applications. The lens is advantageously formed with a contoured-tip ejector pin incorporated into the encapsulant transfer mold, and the lens shape facilitates mold release.
1249 Citations
22 Claims
-
1. An optoelectronic device for contacting biological tissue, the optoelectronic device comprising:
-
an encapsulant having a surface;
a lens comprising a lens portion of said surface of the encapsulant;
a trough in said encapsulant disposed around said lens portion;
a filler portion having a generally smooth surface disposed around said lens, wherein said generally smooth surface contacts the biological tissue and said lens does not protrude substantially beyond said generally smooth surface; and
an optoelectronic element embedded in said encapsulant and operable at at least one wavelength of light, said lens configured to transmit or receive or both transmit and receive said at least one wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
a second light emitting diode embedded in said encapsulant and operable to transmit light through at least a portion of said lens portion.
-
-
15. The optoelectronic device of claim 14, wherein said first light emitting diode transmits wavelengths in the red spectrum and said second light emitting diode transmits wavelengths in the infrared spectrum.
-
16. A pulse oximetry sensor comprising:
-
an encapsulant having a surface;
a lens comprising a lens portion of said surface of the encapsulant;
a trough in said encapsulant surrounding said lens portion; and
an optoelectronic element embedded within said encapsulant. - View Dependent Claims (17, 18, 19, 20)
-
-
21. An optoelectronic device for contacting biological tissue, the optoelectronic device comprising:
-
an encapsulant having a surface;
a lens comprising a spherically-curved lens portion of said surface of the encapsulant;
a generally flat portion of said surface of the encapsulant, wherein said generally flat portion contacts the biological tissue and said lens does not protrude substantially beyond said generally flat portion; and
an optoelectronic element embedded in said encapsulant and operable at at least one wavelength of light, said lens configured to transmit or receive or both transmit and receive said at least one wavelength.
-
-
22. An optoelectronic device for contacting biological tissue, the optoelectronic device comprising:
-
an encapsulant having a surface;
a lens comprising a parabolically-curved lens portion of said surface of the encapsulant;
a generally flat portion of said surface of the encapsulant, wherein said generally flat portion contacts the biological tissue and said lens does not protrude substantially beyond said generally flat portion; and
an optoelectronic element embedded in said encapsulant and operable at at least one wavelength of light, said lens configured to transmit or receive or both transmit and receive said at least one wavelength.
-
Specification