1. A wavelength conversion laser light source, comprising:
a fundamental wave laser light source to generate a fundamental wave;
a first mirror and a second mirror, arranged so as to oppose each other;
a wavelength conversion element which is arranged between the first mirror and the second mirror and converts the wavelength of the fundamental wave; and
a temperature control portion to control the temperature of the wavelength conversion element,
wherein a portion of the fundamental wave is wavelength-converted in the wavelength conversion element, and moreover the fundamental wave which is not wavelength-converted is reflected by the first mirror and the second mirror and is repeatedly incident on the wavelength conversion element and is wavelength-converted, and
the temperature control portion is arranged so as to be in contact with the wavelength conversion element, and the light quantity of the fundamental wave incident on the temperature control portion is reduced.
2. The wavelength conversion laser light source according to claim 1, wherein the first mirror includes a first concave mirror having a first curvature,
the second mirror includes a second concave mirror having a second curvature different from the first curvature, and
the wavelength conversion laser light source further comprises
a condensing optical system arranged such that the fundamental wave has an optically condensed point within the wavelength conversion element, and
a fundamental wave blocking portion which is arranged between the first concave mirror and the temperature control portion andor between the second concave mirror and the temperature control portion, and which reduces the light quantity of the fundamental wave absorbed by the temperature control portion.
3. The wavelength conversion laser light source according to claim 2, wherein the fundamental wave blocking portion includes a fundamental wave absorption portion which absorbs the fundamental wave such that the fundamental wave is not incident on the temperature control portion, and
the fundamental wave absorption portion is thermally separated from the temperature control portion.
4. The wavelength conversion laser light source according to claim 2, wherein the fundamental wave blocking portion includes a reflecting mirror which reflects the fundamental wave such that the fundamental wave is not incident on the temperature control portion.
5. The wavelength conversion laser light source according to claim 4, wherein, if the thickness of the wavelength conversion element is T, the length of the first concave mirror in the thickness direction of the wavelength conversion element is r1, the length of the second concave mirror in the thickness direction of the wavelength conversion element is r2, the distance between the first concave mirror and an end face of the wavelength conversion element on the side of the first concave mirror is d1, and the distance between the second concave mirror and an end face of the wavelength conversion element on the side of the second concave mirror is d2, then when the reflecting mirror is arranged between the first concave mirror and the temperature control portion, the angle \u03b81 made by an optical axis of the fundamental wave incident on the reflecting mirror and a reflecting face of the reflecting mirror satisfies (r1\u2212T)2>d1\xd7tan(\u03c0\u22122\u03b81), and when the reflecting mirror is arranged between the second concave mirror and the temperature control portion, the angle \u03b82 made by the optical axis of the fundamental wave incident on the reflecting mirror and the reflecting face of the reflecting mirror satisfies (r2\u2212T)2>d2\xd7tan(\u03c0\u22122\u03b82).
6. The wavelength conversion laser light source according to claim 2, wherein the temperature control portion has a reflecting end face which reflects the fundamental wave such that the fundamental wave is not incident on the temperature control portion.
7. The wavelength conversion laser light source according to claim 6, wherein, if the thickness of the wavelength conversion element is T, the length of the first concave mirror in the thickness direction of the wavelength conversion element is r1, the length of the second concave mirror in the thickness direction of the wavelength conversion element is r2, the distance between the first concave mirror and an end face of the wavelength conversion element on the side of the first concave mirror is d1, and the distance between the second concave mirror and an end face of the wavelength conversion element on the side of the second concave mirror is d2, then when the reflecting end face is provided on the side of the first concave mirror, the angle \u03c61 made by an optical axis of the fundamental wave incident on the reflecting end face and the reflecting end face satisfies (r1\u2212T)2>d1\xd7tan(\u03c0\u22122\u03c61), and when the reflecting end face is provided on the side of the second concave mirror, the angle \u03c62 made by the optical axis of the fundamental wave incident on the reflecting end face and the reflecting end face satisfies (r2\u2212T)2>d2\xd7tan(\u03c0\u22122\u03c62).
8. The wavelength conversion laser light source according to claim 1, wherein the first mirror includes a first concave mirror having a first curvature,
the second mirror includes a second concave mirror having a second curvature different from the first curvature, and
if the thickness-direction center of the wavelength conversion element is 0 and the thickness of the wavelength conversion element is T in the thickness direction of the wavelength conversion element, at least one of the first and second concave mirrors reflects the fundamental wave only in an area from \u2212T2 to T2.
9. The wavelength conversion laser light source according to claim 1, wherein one of the first and second mirrors includes a concave mirror having a first curvature, and the other includes a cylindrical mirror having, in the width direction of the wavelength conversion element, a second curvature different from the first curvature, and
the cylindrical mirror limits a diameter of the fundamental wave in the thickness direction of the wavelength conversion element to be equal to or less than the thickness of the wavelength conversion element.
10. The wavelength conversion laser light source according to claim 1, wherein at least one of the first and second mirrors has a cutout area to cause the fundamental wave generated from the fundamental wave laser light source to be incident on the wavelength conversion element.
11. An image display device, comprising:
a laser light source, which generates laser light of at least one color among blue, green, and red;
a spatial optical modulation element; and
an optical system which guides light emitted from the laser light source to the spatial optical modulation element;
wherein the laser light source is the wavelength conversion laser light source according to claim 1.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A digital camera comprising;
a user controlled camera system;
an orientation sensor for sensing whether said camera is in one of a horizontal or vertical positions;
a user actuated switch located on the side of said camera when said camera is in said horizontal position; and
means for selectively enablingdisabling said user controlled camera system as a function of the orientation of said orientation sensor.
2. The camera of claim 1 wherein said user controlled camera system is an image capture system.
3. The camera of claim 2 wherein said image capture system includes a shutter assembly and wherein said switch enables activation of said shutter assembly.
4. The camera of claim 2 wherein said camera is a digital camera and wherein said user controlled camera system is a digital image capture system.
5. A digital camera comprising;
an image capture system for capturing an image of a scene;
wherein when said camera is in a normal horizontal position, said image capture system captures a landscape-type image, and wherein when said camera is in a vertical position, oriented 90 from said horizontal position, said image capture system captures a portrait type image;
an orientation sensor for sensing whether said camera is in one of said horizontal or vertical positions;
an image capture switch located on the side of said camera when said camera is in said horizontal position for enabling activation of said image capture system; and
means for selectively preventing enablement of activation of said image capture system by said image capture switch in response to said orientation sensor sensing that said camera is in said horizontal position.
6. The digital camera of claim 5 wherein said image capture switch produces a signal when actuated which effects activation of said image capture system and wherein said means for selectively preventing, selectively prevents said signal from effecting activation of said image capture system.