JP2012142222A5

JP2012142222A5 -

Info

Publication number: JP2012142222A5
Application number: JP2011000543A
Authority: JP
Filing date: 2011-01-05
Publication date: 2014-01-30
Anticipated expiration: 2031-01-05

Claims

A substrate rotatable around a predetermined rotation axis;
A first phosphor layer and a second phosphor layer provided on the first main surface of the substrate;
A light source that emits excitation light for exciting the first phosphor layer and excitation light for exciting the second phosphor layer;
With
The first phosphor layer is provided in a first annular region around a rotation axis of the substrate;
The second phosphor layer is provided in a second annular region on the outer peripheral side of the first annular region,
A light source device that emits first fluorescence emitted from the first phosphor layer and second fluorescence emitted from the second phosphor layer.

The light intensity of the excitation light incident on the second phosphor layer, the light source apparatus according to claim 1, wherein the greater than the light intensity of the excitation light incident on the first phosphor layer.

The said board | substrate consists of the material which permeate | transmits both the excitation light which excites the said 1st fluorescent substance layer, and the excitation light which excites the said 2nd fluorescent substance layer, The Claim 1 or 2 characterized by the above-mentioned. Light source device.

A light guide optical system is provided that divides excitation light for exciting the first phosphor layer and excitation light for exciting the second phosphor layer from light emitted from the light source. The light source device according to claim 3 .

The light guide optical system includes a first mirror and a second mirror,
The first mirror transmits a part of the light emitted from the light source toward the second mirror and reflects the remaining part toward the first phosphor layer,
The second mirror reflects the light transmitted through the first mirror toward the second phosphor layer;
The angle formed by a line connecting the center of the first mirror and the rotation axis and a line connecting the center of the second mirror and the rotation axis when viewed from a direction orthogonal to the first main surface of the substrate is 90. 5. The light source device according to claim 4 , wherein the light source device is at least 270 degrees and at most 270 degrees.

A first combining optical system for combining the first fluorescence emitted from the first phosphor layer and the second fluorescence emitted from the second phosphor layer; the light source device according to any one of claims 1 to 5, wherein.

The first combining optical system includes a third mirror and a fourth mirror,
The third mirror reflects the second fluorescence emitted from the second phosphor layer toward the fourth mirror;
The light source device according to claim 6 , wherein the fourth mirror reflects the first fluorescence and transmits the second fluorescence reflected by the third mirror.

The substrate has a reflecting surface that reflects both the first fluorescence emitted from the first phosphor layer and the second fluorescence emitted from the second phosphor layer;
The first phosphor layer is provided on the same side of the substrate as the side on which excitation light for exciting the first phosphor layer is incident; and
The second phosphor layer, the light source according to claim 1 or 2, characterized in that excitation light for exciting the second fluorescent material layer of the substrate is disposed on the same side as the incident apparatus.

The excitation light that excites the first phosphor layer and the excitation light that excites the second phosphor layer are separated from the light emitted from the light source and emitted from the first phosphor layer. The light source according to claim 8 , further comprising: a second synthesis optical system that synthesizes the first fluorescence and the second fluorescence emitted from the second phosphor layer. apparatus.

The second synthesis optical system includes a part of light emitted from the light source, the first fluorescence emitted from the first phosphor layer, and the first phosphor emitted from the second phosphor layer. The light source device according to claim 9 , wherein the second fluorescence is synthesized.

The second combining optical system includes a first mirror, a second mirror, a third mirror, and a fourth mirror,
The first mirror transmits a part of the light emitted from the light source toward the second mirror, reflects the remaining part toward the first phosphor layer, and the first mirror. Transmitting the first fluorescence emitted from the phosphor layer toward the fourth mirror,
The second mirror reflects the light transmitted through the first mirror toward the second phosphor layer, and causes the second mirror emitted from the second phosphor layer to the third mirror. Transparent to
The third mirror reflects the second fluorescence transmitted through the second mirror toward the fourth mirror;
The light source according to claim 9 or 10 , wherein the fourth mirror transmits the first fluorescence transmitted through the first mirror and reflects the second fluorescence reflected by the third mirror. apparatus.

The angle formed by a line connecting the center of the first mirror and the rotation axis and a line connecting the center of the second mirror and the rotation axis when viewed from a direction orthogonal to the first main surface of the substrate is 90. The light source device according to claim 11 , wherein the light source device has a degree of 270 degrees or more and 270 degrees or less.

The angle formed by the line connecting the center of the third mirror and the rotation axis and the line connecting the center of the fourth mirror and the rotation axis when viewed from the direction orthogonal to the first main surface of the substrate is 90. The light source device according to claim 11 or 12 , wherein the light source device has a degree of 270 degrees or more and 270 degrees or less.

The second combining optical system includes a first mirror, a second mirror, a third mirror, a fourth mirror, a fifth mirror, and a sixth mirror.
The first mirror transmits a part of the light emitted from the light source toward the second mirror, reflects the remaining part toward the first phosphor layer, and the first mirror. Transmitting the first fluorescence emitted from the phosphor layer toward the sixth mirror,
The second mirror transmits a part of the light transmitted through the first mirror toward the third mirror and reflects the remaining part toward the fifth mirror,
The third mirror reflects the second fluorescence emitted from the second phosphor layer and reflects the excitation light transmitted through the second mirror toward the second phosphor layer. To penetrate toward
The fourth mirror reflects the second fluorescence transmitted through the third mirror toward the fifth mirror;
The fifth mirror reflects the excitation light reflected by the second mirror toward the sixth mirror and reflects the second fluorescence reflected by the fourth mirror by the reflection direction of the excitation light reflected by itself. Is transmitted in the same direction as
The sixth mirror transmits the first fluorescence transmitted through the first mirror and reflects both the excitation light reflected by the fifth mirror and the second fluorescence transmitted through the fifth mirror. The light source device according to claim 10 .

The light source device according to claim 14 , wherein the second mirror is disposed on an optical path of light that linearly travels between the first mirror and the third mirror.

When viewed from a direction orthogonal to the first main surface of the substrate, the fourth mirror overlaps the third mirror, the fifth mirror overlaps the second mirror, and the sixth mirror overlaps the first mirror. The light source device according to claim 15 , wherein the light source device is a light source device.

The light source device according to any one of claims 1 to 16 , wherein the excitation light is blue light, the first fluorescence is red light, and the second fluorescence is green light. .

It said light source light source device according to any one of claims 1 to 17, characterized in that a semiconductor element.

The light source device according to claim 18 , wherein the light source is a semiconductor laser.

A first reflection surface that reflects the first fluorescence emitted from the first phosphor layer is formed between the substrate and the first phosphor layer, and
The second reflecting surface for reflecting the second fluorescence emitted from the second phosphor layer is formed between the substrate and the second phosphor layer. Item 20. The light source device according to any one of Items 1 to 19.

The light source device according to any one of claims 1 to 20,
A light modulation device that modulates light emitted from the light source device according to image information;
A projection optical system that projects modulated light from the light modulation device as a projection image;
A projector comprising: