IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0014492
(2008-01-15)
|
등록번호 |
US-8126025
(2012-02-28)
|
우선권정보 |
JP-2007-011336 (2007-01-22) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
17 인용 특허 :
5 |
초록
▼
A laser light source apparatus includes a first laser array light source that emits first-wavelength light, and a second laser array light source that emits second-wavelength light, the second wavelength being different from the first wavelength. The first laser array light source includes a first f
A laser light source apparatus includes a first laser array light source that emits first-wavelength light, and a second laser array light source that emits second-wavelength light, the second wavelength being different from the first wavelength. The first laser array light source includes a first fundamental wave laser array that produces first fundamental wave light having a first original wavelength, and a first wavelength conversion element that wavelength-converts the first fundamental wave light into the first-wavelength light. The second laser array light source includes a second fundamental wave laser array that produces second fundamental wave light having a second original wavelength different from the first original wavelength, and a second wavelength conversion element that wavelength-converts the second fundamental wave light into the second-wavelength light.
대표청구항
▼
1. A laser light source apparatus comprising: a first laser array light source that emits a first-wavelength light;a first package that houses the first laser array light source;a second laser array light source that emits a second-wavelength light, the second wavelength being different from the fir
1. A laser light source apparatus comprising: a first laser array light source that emits a first-wavelength light;a first package that houses the first laser array light source;a second laser array light source that emits a second-wavelength light, the second wavelength being different from the first wavelength; anda second package that houses the second laser array light source, wherein the first laser array light source includes a first fundamental wave laser array that produces a first fundamental wave light having a first original wavelength, anda first wavelength conversion element that wavelength-converts the first fundamental wave light into the first-wavelength light having a color, andthe second laser array light source includes a second fundamental wave laser array that produces a second fundamental wave light having a second original wavelength different from the first original wavelength, anda second wavelength conversion element that wavelength-converts the second fundamental wave light into the second-wavelength light having a same color as the first-wavelength light,the first package and the second package are disposed adjacent to each other,each of the first and second fundamental wave laser arrays includes first and second mirrors that reflect light having the first and second original wavelengths and hence form a cavity, anda wavelength selection element and a gain medium provided between the first and second mirrors, the wavelength selection element selectively transmitting light having a specific wavelength, the gain medium having a gain band for a specific wavelength range,the wavelength selection elements in the first and second fundamental wave laser arrays are of the same type,the wavelength selection element in the first fundamental wave laser array transmits the light having the first original wavelength,the gain band of the gain medium in the first fundamental wave laser array is set in such a way that laser oscillation occurs in the gain medium at the first original wavelength,the wavelength selection element in the second fundamental wave laser array transmits the light having the second original wavelength,the gain band of the gain medium in the second fundamental wave laser array is set in such a way that laser oscillation occurs in the gain medium at the second original wavelength,the wavelength selection elements in the first and second fundamental wave laser arrays have the same transmission characteristic in which the selectively transmitted wavelength changes according to the angle at which the incident light impinges on the wavelength selection element, andthe wavelength selection elements in the first and second fundamental wave laser arrays are disposed in such a way that the inclination angle of the wavelength selection element to the resonance direction of the cavity in the first fundamental wave laser array differs from the inclination angle of the wavelength selection element to the resonance direction of the cavity in the second fundamental wave laser array. 2. A laser light source apparatus comprising: a first laser array light source that emits a first-wavelength light;a first package that houses the first laser array light source;a second laser array light source that emits a second-wavelength light, the second wavelength being different from the first wavelength; anda second package that houses the second laser array light source, wherein the first laser array light source includes a first fundamental wave laser array that produces a first fundamental wave light having a first original wavelength, anda first wavelength conversion element that wavelength-converts the first fundamental wave light into the first-wavelength light having a color, andthe second laser array light source includes a second fundamental wave laser array that produces a second fundamental wave light having a second original wavelength different from the first original wavelength, anda second wavelength conversion element that wavelength-converts the second fundamental wave light into the second-wavelength light having a same color as the first-wavelength light,the first package and the second package are disposed adjacent to each other,each of the first and second fundamental wave laser arrays includes first and second mirrors that reflect light having the first and second original wavelengths and hence form a cavity, anda wavelength selection element and a gain medium provided between the first and second mirrors, the wavelength selection element selectively transmitting light having a specific wavelength, the gain medium having a gain band for a specific wavelength range,the wavelength selection elements in the first and second fundamental wave laser arrays are of the same type,the wavelength selection element in the first fundamental wave laser array transmits the light having the first original wavelength,the gain band of the gain medium in the first fundamental wave laser array is set in such a way that laser oscillation occurs in the gain medium at the first original wavelength,the wavelength selection element in the second fundamental wave laser array transmits the light having the second original wavelength,the gain band of the gain medium in the second fundamental wave laser array is set in such a way that laser oscillation occurs in the gain medium at the second original wavelength,each of the wavelength selection elements of the same type uses an actuator provided therein to change the wavelength selection state thereof so as to change the selectively transmitted wavelength, andthe wavelength selection state of the wavelength selection element in the first fundamental wave laser array is set to be different from that of the wavelength selection element in the second fundamental wave laser array. 3. The laser light source apparatus according to claim 1, wherein the wavelength selection elements in the first and second fundamental wave laser arrays have the same transmission characteristic that allows selective transmission of both the first and second original wavelengths. 4. The laser light source apparatus according to claim 1, wherein each of the first and second wavelength conversion elements has different wavelength conversion efficiencies for different wavelengths of the fundamental wave light,the wavelength conversion element in the first laser array light source has higher wavelength conversion efficiency at the first original wavelength than at the second original wavelength, andthe wavelength conversion element in the second laser array light source has higher wavelength conversion efficiency at the second original wavelength than at the first original wavelength. 5. The laser light source apparatus according to claim 1, wherein the first and second wavelength conversion elements are of the same type in which the wavelength conversion efficiency which changes with temperature is higher than a predetermined efficiency,the first laser array light source has a first temperature adjuster that adjusts the temperature of the first wavelength conversion element in such a way that the wavelength conversion efficiency at the first original wavelength is higher than the predetermined efficiency, andthe second laser array light source has a second temperature adjuster that adjusts the temperature of the second wavelength conversion element in such a way that the wavelength conversion efficiency at the second original wavelength is higher than the predetermined efficiency. 6. A monitoring apparatus comprising: the laser light source apparatus according to claim 1; andan imager that images a subject illuminated by the laser light source apparatus. 7. An image display apparatus comprising: the laser light source apparatus according to claim 1;a light modulator that modulates the laser light that exits from the laser light source apparatus according to an image signal; anda projection optical system that projects the image formed by the light modulator. 8. The laser light source apparatus according to claim 1, wherein the first package has a base, the first laser array light source being disposed on a surface of the base of the first package,the second package has a base, the second laser array light source being disposed on a surface of the base of the second package, andthe first package and the second package are arranged such that the surfaces of the bases on which the first and second laser array light sources are disposed are facing each other.
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