公开(公告)号：WO1989002611A1

公开(公告)日：1989-03-23

申请号：PCT/US1988003055

申请日：1988-09-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HEGG, Ronald, G. ,  SMITH, Ronald, T. ,  CHERN, Mao-Jin ,  FERRER, John, J.

IPC: G02B27/00

CPC classification number: G02B27/0101 ,  B60K2350/1064 ,  B60K2350/2052 ,  G02B2027/0118 ,  G02B2027/0165

Abstract: A compact, inexpensive and mass-producible optical display system for an automobile creates a highly visible and sharp, high contrast and pleasing, multi-color magnified virtual image of a primary instrument cluster at a viewing distance which is greater than the actual optical distance between the dashboard and the driver's eyes in order to enhance instrument readability, minimize driver eye strain, and reduce eye focus problems which are associated with transitioning between the far range viewing used for watching the road ahead and the near range viewing used for glancing at the instruments. A non-pupil forming display system uses a single off-axis asphericle mirror with power to create a virtual image of a miniaturized, multi-color passive image source, such as a segmented LCD panel, which is backlighted by a small filament incandescent light bulb. The aspheric surface is optimized to minimize aberrations and reduce vertical disparity and field curvature. The image source is pre-distorted to compensate for distortion in the off-axis configuration. A holographic diffusing screen element laminated onto the image source provides uniform high brightness and uniform contrast over the entire field-of-view which is visible from an eyellipse sufficient to accommodate most of the driver population, minimizes the visual impact of any optical aberrations near the edge of the viewing area, and provides the non-pupil forming system with some of the desirable optical properties of a pupil forming system. The incandescent bulb is positioned at a remote location selected to minimize heat in the region of the image source and to facilitate replacement of the bulb in case of failure. The light emitted by the bulb is collected and focused into the aperture of a fiber optic bundle which splits into a number of ends behind the LCD panel. Ambient reflections are reduced and controlled by a curved and tilted glare shield and a black surface light trap.

公开(公告)号：WO1983004317A1

公开(公告)日：1983-12-08

申请号：PCT/US1983000842

申请日：1983-05-26

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  MOSS, Gaylord, E. ,  CHERN, Mao-Jin ,  DOBBS, Teena, L.

IPC: G02B05/32

CPC classification number: B23K26/032 ,  A61F9/022 ,  G02B5/203 ,  G02B5/32 ,  G03H2270/55

Abstract: A holographic reflector (20) for reflecting laser radiation at a predetermined wavelength. The reflector employs a plurality of holograms (31, 33) which are disposed adjacent to one another and which are conterminous with each other. The holograms (31, 33) are generally disposed in a support structure (21) which may be a visor or goggle arrangement. Each of the holograms may be either parallel fringe holograms or slanted fringe holograms. The angular orientation of the fringes and the relative spacing thereof determine the angular coverage provided by the reflector (20). The reflector (20) provides for reflection of laser radiation at a predetermined wavelength and within a particular angular subtence (DELTA)3,DELTA)4,DELTA)5) while allowing high see-through in the visible wavelength region. Multiple sets of holograms may also be stacked in order to protect against multiple laser sources.

公开(公告)号：WO1986003853A1

公开(公告)日：1986-07-03

申请号：PCT/US1985002144

申请日：1985-10-30

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CHERN, Mao-Jin ,  WREEDE, John, E.

IPC: G03H01/18

CPC classification number: G03H1/18 ,  G03C1/66 ,  Y10S359/90

Abstract: A holographic recording medium is treated to reduce or eliminate unwanted extraneous diffraction and flare. Regions adjacent surfaces of the medium are desensitized to reduce contrast in the holographic fringe pattern along the surfaces, thereby eliminating planar phase grating effects. Treatments include applying a burst of gas or vapor to the surfaces of the medium, irradiating the surfaces with highly absorbed incoherent light, thermally treating the medium as it is built up from sequentially applied layers, building up layers of different concentrations of light-sensitive material, and developing diffusion regions at interfaces of layers within the holographic recording medium.

公开(公告)号：WO1985001115A1

公开(公告)日：1985-03-14

申请号：PCT/US1984001257

申请日：1984-08-09

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CHERN, Mao-Jin ,  SMITH, Ronald, T. ,  PETERS, John, W.

IPC: G02B01/10

CPC classification number: G02B1/10 ,  B01J12/02 ,  G01B5/00 ,  G02B5/289 ,  Y10S359/90 ,  Y10T428/24736

Abstract: A process for depositing on the surface of a substrate a layer of a chosen material having continuous gradations in refractive index in a predetermined periodic pattern. The substrate is exposed to two vapor phase reactants which react upon radiation-inducement to produce the chosen material, and the relative proportion of the reactants is varied in a predetermined and continuous sequence to produce continuous gradations in the stoichiometric composition and refractive index of the deposited layer as a function of thickness. Additionally, predetermined changes in refractive index and/or thickness across the horizontal surface of the substrate may be produced in combination with the change in refractive index as a function of thickness. Diffraction optical elements formed by such a process include various optical filters and reflective optical coatings.

公开(公告)号：WO1987001211A2

公开(公告)日：1987-02-26

申请号：PCT/US1986001574

申请日：1986-08-01

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CHERN, Mao-Jin ,  FERRER, John, J. ,  SMITH, Ronald, T.

IPC: G02B27/00

CPC classification number: G02B1/10 ,  G02B5/0883 ,  G02B5/28 ,  G02B5/32 ,  G02B27/0103 ,  G02B27/1006 ,  G02B27/1086 ,  G02B27/142 ,  G02B27/149 ,  G02B2027/0105 ,  G02B2027/0107 ,  G02B2027/0116 ,  G02B2027/0145

Abstract: An improved optical combiner useful in many applications. The combiner includes a substrate (10) with at least one aspheric surface and a diffraction-type reflective coating (12) formed on the substrate (10) for selectively reflecting radiation within one or more predetermined narrow band ranges of wavelengths impinging on the coating. The aspericity of the surface may be selected to compensate or balance optical aberations. The coating is advantageously a graded-index (16) coating (12), which eliminates the possible degradation of gelatin hologram coatings due to moisture. A process for applying the graded-index (16) coating (12) to a substrate (10) is disclosed. The variation in the index profile of the coating can be selected to provide the capability of combiners with multiple color reflectivity responses, or which allow use of display light sources of wider spectral bandwidth, resulting in a brighter image and improved angular bandwidth.

Abstract translation: 一种改进的光学组合器，可用于许多应用。 组合器包括具有至少一个非球面的衬底（10）和形成在衬底（10）上的衍射型反射涂层（12），用于选择性地反射在一个或多个预定的窄带波长范围内的辐射。 可以选择表面的平滑度以补偿或平衡光学像差。 该涂层有利地是渐变折射率（16）涂层（12），其消除了由于水分导致的明胶全息图涂层的可能劣化。 公开了一种将渐变折射率（16）涂层（12）应用于基底（10）的方法。 可以选择涂层的折射率分布的变化以提供具有多种颜色反射率响应的组合器的能力，或者允许使用更宽光谱带宽的显示光源，导致更亮的图像和改进的角带宽。

公开(公告)号：WO1984000615A1

公开(公告)日：1984-02-16

申请号：PCT/US1983001109

申请日：1983-07-20

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CHERN, Mao-Jin ,  GUNTHER, John, E. ,  SMITH, Ronald, T.

IPC: G02B05/32

CPC classification number: G02B5/32 ,  G02B6/08 ,  G03H2001/0413 ,  G03H2223/18 ,  G03H2250/32

Abstract: Optical assembly (34) has a transmission holographic optical element (46) which refracts the incoming ray (38) at an angle through the angularly oriented fiber (56) in fiber optic faceplate (48). Holographic optical element (50) refracts the ray (66) to become ray (44) toward a viewing pupil. The zero-order light from holographic optical element (46) is absorbed as ray (68) in the fiber optic faceplate. The zero-order light represented by ray (76) is absorbed in the holographic optical element (50). Holographic optical element (50) preferably forms a diffused viewing pupil for inspection of the light by the user.

公开(公告)号：EP0110963B1

公开(公告)日：1987-11-19

申请号：EP83902076.5

申请日：1983-05-26

Applicant: Hughes Aircraft Company

Inventor： MOSS, Gaylord E. ,  CHERN, Mao-Jin ,  DOBBS, Teena L.

IPC: G02B5/32 ,  B23K26/02 ,  A61F9/06

CPC classification number: B23K26/032 ,  A61F9/022 ,  G02B5/203 ,  G02B5/32 ,  G03H2270/55

Abstract: A holographic reflector (20) for reflecting laser radiation at a predetermined wavelength. The reflector employs a plurality of holograms (31, 33) which are disposed adjacent to one another and which are conterminous with each other. The holograms (31, 33) are generally disposed in a support structure (21) which may be a visor or goggle arrangement. Each of the holograms may be either parallel fringe holograms or slanted fringe holograms. The angular orientation of the fringes and the relative spacing thereof determine the angular coverage provided by the reflector (20). The reflector (20) provides for reflection of laser radiation at a predetermined wavelength and within a particular angular subtence (DELTA)3,DELTA)4,DELTA)5) while allowing high see-through in the visible wavelength region. Multiple sets of holograms may also be stacked in order to protect against multiple laser sources.

公开(公告)号：EP0332693A1

公开(公告)日：1989-09-20

申请号：EP88908792.0

申请日：1988-09-06

Applicant: Hughes Aircraft Company

Inventor： HEGG, Ronald, G. ,  SMITH, Ronald, T. ,  CHERN, Mao-Jin ,  FERRER, John, J.

IPC: G02B13 ,  G02B17 ,  G02B27

CPC classification number: G02B27/0101 ,  B60K2350/1064 ,  B60K2350/2052 ,  G02B2027/0118 ,  G02B2027/0165

Abstract: A compact, inexpensive and mass-­ producible optical display system for an automobile creates a highly visible and sharp, high contrast and pleasing, multi-­ color magnified virtual image of a primary instrument cluster at a viewing distance which is greater than the actual optical distance between the dashboard and the driver's eyes in order to enhance instru­ ment readability, minimize driver eye strain, and reduce eye focus problems which are associated with transitioning be­ tween the far ranges viewing used for watching the road ahead and the near range viewing used for glancing at the in­ struments. A non-pupil forming display system uses a single off-axis asphericle mirror with power to create a virtual image of a miniaturized, multi-color passive image source, such as segmented LCD panel, which is backlighted by a small filament incandescent light bulb. The aspheric surface is optimized to minimize aberrations and reduce vertical disparity and field curvature. The image source is pre-distorted to compensate for distor­ tion in the off-axis configuration. A holographic diffusing screen element laminated onto the image source provides un­ iform high brightness and uniform contrast over the entire field-of-view which is visible from an eyellipse sufficient to ac­ commodate most of the driver population, minimizes the visual impact of any optical aberrations near the edge of the viewing area, and provides the non-pupil forming system with some of the desirable optical properties of a pupil forming system. The incandescent bulb is positioned at a remote location selected to minimize heat in the region of the image source and to facilitate replacement of the bulb in case of failure. The light emitted by the bulb is collected and focused in­ to the aperture of a fiber optic bundle which splits into a number of ends behind the LCD panel. Ambient reflections are reduced and controlled by a curved and tilted glare shield and a black surface light trap.

公开(公告)号：EP0233913A1

公开(公告)日：1987-09-02

申请号：EP86905048.0

申请日：1986-08-01

Applicant: Hughes Aircraft Company

Inventor： CHERN, Mao-Jin ,  FERRER, John, J. ,  SMITH, Ronald, T.

IPC: G02B5 ,  G02B1 ,  G02B23 ,  G02B27

CPC classification number: G02B1/10 ,  G02B5/0883 ,  G02B5/28 ,  G02B5/32 ,  G02B27/0103 ,  G02B27/1006 ,  G02B27/1086 ,  G02B27/142 ,  G02B27/149 ,  G02B2027/0105 ,  G02B2027/0107 ,  G02B2027/0116 ,  G02B2027/0145

Abstract: An improved optical combiner useful in many applications. The combiner includes a substrate (10) with at least one aspheric surface and a diffraction-type reflective coating (12) formed on the substrate (10) for selectively reflecting radiation within one or more predetermined narrow band ranges of wavelengths impinging on the coating. The aspericity of the surface may be selected to compensate or balance optical aberations. The coating is advantageously a graded-index (16) coating (12), which eliminates the possible degradation of gelatin hologram coatings due to moisture. A process for applying the graded-index (16) coating (12) to a substrate (10) is disclosed. The variation in the index profile of the coating can be selected to provide the capability of combiners with multiple color reflectivity responses, or which allow use of display light sources of wider spectral bandwidth, resulting in a brighter image and improved angular bandwidth.

公开(公告)号：EP0153384A1

公开(公告)日：1985-09-04

申请号：EP84903219.0

申请日：1984-08-09

Applicant: Hughes Aircraft Company

Inventor： CHERN, Mao-Jin ,  SMITH, Ronald, T. ,  PETERS, John, W.

IPC: G02B6 ,  B01J12 ,  C03C17 ,  G01B5 ,  G02B1 ,  G02B5

CPC classification number: G02B1/10 ,  B01J12/02 ,  G01B5/00 ,  G02B5/289 ,  Y10S359/90 ,  Y10T428/24736

Abstract: A process for depositing on the surface of a substrate a layer of a chosen material having continuous gradations in refractive index in a predetermined periodic pattern. The substrate is exposed to two vapor phase reactants which react upon radiation-inducement to produce the chosen material, and the relative proportion of the reactants is varied in a predetermined and continuous sequence to produce continuous gradations in the stoichiometric composition and refractive index of the deposited layer as a function of thickness. Additionally, predetermined changes in refractive index and/or thickness across the horizontal surface of the substrate may be produced in combination with the change in refractive index as a function of thickness. Diffraction optical elements formed by such a process include various optical filters and reflective optical coatings.