Radiation-emitting component
View Patent ↗A radiation-emitting component with a semiconductor body is intended for emitting electromagnetic radiation from its front side. The component also includes a reflective optical element. This optical element is intended to direct some of the radiation emitted by the semiconductor body, which impinges directly on the reflective optical element, into an outer region of a target zone. A refractive optical element is intended to focus the reflected fraction of the radiation into the outer region of the target zone and to focus the remaining fraction of the radiation into an inner region of the target zone.
1. A radiation-emitting component comprising:
a semiconductor body configured to emit electromagnetic radiation from its front side;
a reflective optical element with a plurality of oblique, reflective side faces, which are arranged so as to surround the semiconductor body; and
a refractive optical element arranged downstream of the reflective optical element in a direction of emission of the semiconductor body,
wherein a first part of the radiation of the semiconductor body, which is emitted from the front side of the semiconductor body under a flat angle relative to the front side being an angle smaller than or equal to 60°, impinges directly on the reflective element and is directed to an outer region of a target region by the reflective element, and thereby passes through an outer region of the refractive optical element, and
wherein a second part of the radiation of the semiconductor body, which is emitted from the front side of the semiconductor body under a comparatively steep angle relative to the front side of greater than 60°, impinges directly on the refractive optical element without first impinging on the reflective optical element, passes through an inner region of the refractive optical element and thereby is bundled in an inner region of the target region by the refractive optical element.
2. The radiation-emitting component according to claim 1 , wherein at least one oblique side face of the reflective optical element is curved.
3. The radiation-emitting component according to claim 1 , wherein a shape of the refractive optical element or of the reflective optical element is adapted to a shape of a target zone.
4. The radiation-emitting component according claim 3 , wherein the target zone takes the form of a rectangular area.
5. The radiation-emitting component according to claim 1 , wherein the refractive optical element comprises a Fresnel lens, a biconic lens, a toric lens, a lens with an outer surface in accordance with an x, y polynomial, a planar convex lens, a biconvex lens, a lens array or a segmented lens.
6. The radiation-emitting component according to claim 1 , wherein the refractive optical element exhibits a quadrant-symmetrical shape.
7. The radiation-emitting component according to claim 1 , wherein an aperture of the reflective element, which is defined by the side faces of the reflective element, defines a rectangular area.
8. The radiation-emitting component according to claim 1 , wherein an aperture of the reflective element, which is defined by the oblique side faces of the reflective element, defines an octagonal area.
9. The radiation-emitting component according to claim 1 , further comprising a wavelength conversion material configured to convert some of the radiation generated by the semiconductor body into radiation of a different wavelength range.
10. The radiation-emitting component according to claim 1 , further comprising a second radiation-emitting semiconductor body.
11. The radiation-emitting component according to claim 1 , wherein a ratio between a maximum height of the component and a width of the semiconductor body is between 1.5 and 3, limit values included.
12. The radiation-emitting component according to claim 1 , wherein a first or second aperture of the reflective element limits an octagonal area, the first and/or second aperture being limited by the oblique side faces of the reflective element.
13. A radiation-emitting component comprising:
a semiconductor body configured to emit electromagnetic radiation from its front side;
a reflective optical element with a plurality of oblique, reflective side faces, which are arranged so as to surround the semiconductor body; and
a refractive optical element arranged downstream of the reflective optical element in a direction of emission of the semiconductor body,
wherein a first part of the radiation of the semiconductor body, which is emitted from the front side of the semiconductor body under a flat angle relative to the front side being an angle smaller than or equal to 60°, impinges directly on the reflective element and is directed to an outer region of a target region by the reflective element, and thereby passes through an outer region of the refractive optical element,
wherein a second part of the radiation of the semiconductor body, which is emitted from the front side of the semiconductor body under a comparatively steep angle relative to the front side of greater than 60°, impinges directly on the refractive optical element without firstly impinging on the reflective optical element, passes through an inner region of the refractive optical element and thereby is bundled in an inner region of the target region by the refractive optical element, and
wherein a first or second aperture of the reflective element limit an octagonal area, the first or second aperture being limited by the oblique side faces of the reflective element.