LED lamp with uniform omnidirectional light intensity output

1. A light emitting apparatus comprising:

an LED-based light source;

a phosphor containing spheroidal diffuser generating a light intensity distribution output responsive to illumination inside the diffuser; and

a base including a base connector, said base having outermost sidewalls angling outward adjacent said diffuser, said angling sidewalls located externally to the diffuser and wherein a greatest outermost width of said angling sidewalls is closer to the base connector than to the diffuser;

the LED-based light source, the diffuser, and the base being secured together as a unitary LED lamp installable in a lighting socket by connecting the base connector with the lighting socket; and

the base being operatively connected with the LED-based light source in the unitary LED lamp to electrically power the LED-based light source using electrical power received at the base connector.

2. The light emitting apparatus of claim 1 wherein the LED-based light source is arranged tangentially to a base portion of the diffuser.

3. The light emitting apparatus of claim 1 wherein said diffuser comprises an oblate spheroidal shape.

4. The light emitting apparatus of claim 1 wherein said diffuser includes a first section adjacent the base having a first spheroidal shape and a second section remote from the base having a second spheroidal shape different from the first.

5. The solid-state lamp of claim 1 wherein said LED-based light source is disclosed adjacent a perimeter of the diffuser.

6. A wavelength-converting component comprising:

a light transmissive hollow component defining an interior volume and having a substantially circular cross section, a substantially circular opening and at least one wavelength-converting material which generates light in response to excitation light, wherein the component includes:

(i) a first portion arranged proximate to the opening having an increasing lateral dimension moving away from the opening, and

(ii) a second portion arranged distal from the opening having a decreasing lateral dimension moving away from the opening, and

(iii) a location along the periphery of the component at which the maximum lateral dimension of the first and second portions are the same;

wherein the first portion of the light transmissive hollow component has a length X along an axis of rotational symmetry and the second portion of the light transmissive hollow component has a length Y along the axis of rotational symmetry, and wherein X>2Y.

7. The wavelength-converting component of claim 6 wherein the wavelength-converting material is a phosphor.

8. The wavelength-converting component of claim 6 wherein the first portion has prolate shape, and the second portion has an oblate shape.

9. The wavelength-converting component of claim 8 wherein the first portion has a shape of a truncated prolate semi-ellipsoid, and the second portion has a shape of an oblate semi-ellipsoid.

10. The wavelength-converting components of claim 6 wherein x>=3y.

11. The wavelength-converting component of claim 6 wherein the phosphor is a diffusing phosphor.

12. The wavelength-converting component of claim 6 wherein the wavelength-converting material comprises a diffuser.

13. A solid-state lamp comprising the wavelength-converting component of claim 6 .

14. The solid-state lamp of claim 13 further comprising one or more LED devices wherein the wavelength-converting component is remote to the one or more LED devices.

15. The wavelength-converting component of claim 6 in arrangement with a planar LED-based distorted Lambertian light source.