IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0995682
(2001-11-29)
|
우선권정보 |
JP-0367521 (2000-12-01); JP-0248727 (2001-08-20) |
발명자
/ 주소 |
- Akizuki, Yukio
- Matsui, Akihiko
- Makino, Takero
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
|
대리인 / 주소 |
Wenderoth, Lind & Ponack, L.L.P.
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
4 |
초록
▼
The present invention is to provides a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft. The foil gas bearing has a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacem
The present invention is to provides a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft. The foil gas bearing has a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacement of the rotary shaft, which is provided between rotary shaft and rotary shaft retainer. Plural protrusions are formed at one element, which is either the rotary shaft retainer or the back spring. Plural recesses are formed at the other elements, which is either the back spring or the rotary shaft retainer at places which correspond to the protrusions. The protrusions partially fit into the recesses.
대표청구항
▼
The present invention is to provides a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft. The foil gas bearing has a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacem
The present invention is to provides a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft. The foil gas bearing has a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacement of the rotary shaft, which is provided between rotary shaft and rotary shaft retainer. Plural protrusions are formed at one element, which is either the rotary shaft retainer or the back spring. Plural recesses are formed at the other elements, which is either the back spring or the rotary shaft retainer at places which correspond to the protrusions. The protrusions partially fit into the recesses. and the opposite-to-modulator surface of the total reflection prism, wherein the fluxes of incident light output from the lighting source pass through the total reflection prism, the refractive index matching layer, and the transparent cover plate, in that order, and are incident on the micro-mirrors of the reflecting optical spatial modulator element. 3. The image displaying apparatus according to claim 1, wherein the substrate of the reflecting optical spatial modulator element has a black surface, opposite to the micro-mirrors to absorb light incident on the black surface. 4. The image displaying apparatus according to claim 1, wherein the substrate of the reflecting optical spatial modulator element has an antireflection film on a surface opposite to the micro-mirrors, absorbing light incident on the antireflection film. 5. The image displaying apparatus according to claim 1, wherein the substrate of the reflecting optical spatial modulator element has a surface with a saw-tooth shaped in cross-section, opposite to the micro-mirrors, reflecting light incident on the surface with the saw-tooth shaped in directions other than the on-direction. 6. The image displaying apparatus according to claim 1, wherein the substrate of the reflecting optical spatial modulator element has a light scattering surface, opposite to the micro-mirrors, scattering light incident on the light scattering surface in directions other than the on-direction. 7. An image displaying apparatus comprising: a lighting source for outputting a plurality of fluxes of incident light; a total reflection prism having an opposite-to-modulator surface; a reflecting optical spatial modulator element, opposite the opposite-to-modulator surface of the total reflection prism, receiving the fluxes of incident light output from the lighting source through the total reflection prism and outputting a plurality of fluxes of outgoing light including image information; and a projecting optical system for projecting the fluxes of outgoing light output from the reflecting optical spatial modulator element and propagating in an on-direction, onto a screen to display an image on the screen according to the image information included in the fluxes of outgoing light, wherein the reflecting optical spatial modulator element comprises: a substrate; a transparent cover plate; a refractive index matching layer having a refractive index near to refractive indices of the transparent cover plate and the total reflection prism and located between the transparent cover plate and the opposite-to-modulator surface of the total reflection prism; and a plurality of micro-mirrors, disposed on the substrate and respectively inclined by an on-angle and an off-angle in an on-state or an off-state, respectively, receiving each flux of incident light through the refractive index matching layer and the transparent cover plate, and reflecting the fluxes of incident light as the fluxes of outgoing light, propagating each flux of outgoing light reflected by the micro-mirror in the on-state in an on-direction, and propagating each flux of outgoing light reflected by the micro-mirror in the off-state in an off-direction. 8. The image displaying apparatus according to claim 7, wherein the substrate of the reflecting optical spatial modulator element has a black surface, opposite to the micro-mirrors, absorbing light incident on the black surface. 9. The image displaying apparatus according to claim 7, wherein the substrate of the reflecting optical spatial modulator element has an antireflection film on a surface opposite the micro-mirrors, absorbing light incident on the antireflection film. 10. The image displaying apparatus according to claim 7, wherein the substrate of the reflecting optical spatial modulator element has a surface with saw-tooth shape in cross-section, opposite the micro-mirrors, reflecting light incident on the surface with the saw-tooth shape in directions other than the on-direction. 11. The image displaying apparatus according to claim 7, wherein the substrate of the reflecting optical spatial modulator element has a light scattering surface, opposite the micro-mirrors, scattering light incident on the light scattering surface in directions other than the on-direction. 12. An image displaying apparatus comprising: a lighting source for outputting a plurality of fluxes of incident light; a reflecting optical spatial modulator element receiving the fluxes of incident light output from the lighting source and outputting a plurality of fluxes of outgoing light including image information; and a projecting optical system projecting the fluxes of outgoing light, output from the reflection type optical spatial modulator element and propagating in an on-direction, onto a screen to display an image on the screen according to the image information included in the fluxes of outgoing light, wherein the reflecting optical spatial modulator element comprises: a transparent cover plate; a plurality of micro-mirrors, respectively inclined by one of an on-angle and an off-angle in an on-state and an off-state, respectively, reflecting the fluxes of incident light passing through the transparent cover plate as the fluxes of outgoing light and propagating each flux of outgoing light reflected on the micro-mirror in the on-state in an on-direction and propagating each flux of outgoing light reflected by the micro-mirror in the off-state in an off-direction; and a substrate supporting the micro-mirrors and preventing each flux of incident light, which passes through the transparent cover plate and is not incident on any micro-mirror from reaching projecting optical system. 13. The image displaying apparatus according to claim 12, wherein the substrate of the reflecting optical spatial modulator element has a black surface, opposite the micro-mirrors, absorbing light incident on the black surface. 14. The image displaying apparatus according to claim 12, wherein the substrate of the reflecting optical spatial modulator element has an antireflection film, on a surface opposite to the micro-mirrors, absorbing light incident on the antireflection film. 15. The image displaying apparatus according to claim 12, wherein the substrate of the reflecting optical spatial modulator element has a surface saw-tooth shape in cross-section, opposite the micro-mirrors, reflecting light incident on the surface with the saw-tooth shape in directions other than the on-direction. 16. The image displaying apparatus according to claim 12, wherein the substrate of the reflecting optical spatial modulator element has a light scattering surface, opposite the micro-mirrors, scattering light incident on the light scattering surface in directions other than the on-direction.
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