TWI769448B - Projection device for projection of stereo images - Google Patents

Projection device for projection of stereo images Download PDF

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TWI769448B
TWI769448B TW109112955A TW109112955A TWI769448B TW I769448 B TWI769448 B TW I769448B TW 109112955 A TW109112955 A TW 109112955A TW 109112955 A TW109112955 A TW 109112955A TW I769448 B TWI769448 B TW I769448B
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image light
polarized
polarized image
light
projecting
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TW109112955A
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TW202141124A (en
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陳錫勳
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怡利電子工業股份有限公司
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Priority to DE102020118239.2A priority patent/DE102020118239B4/en
Priority to JP2020120280A priority patent/JP6995169B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/211—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays producing three-dimensional [3D] effects, e.g. stereoscopic images
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • G02B30/29—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays characterised by the geometry of the lenticular array, e.g. slanted arrays, irregular arrays or arrays of varying shape or size
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/16—Stereoscopic photography by sequential viewing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/363—Image reproducers using image projection screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/23—Optical features of instruments using reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
    • G02B2027/0134—Head-up displays characterised by optical features comprising binocular systems of stereoscopic type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
    • G02B2027/0136—Head-up displays characterised by optical features comprising binocular systems with a single image source for both eyes

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Transportation (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Instrument Panels (AREA)
  • Polarising Elements (AREA)
  • Projection Apparatus (AREA)

Abstract

A projection device for projection of stereo images, which includes a projection module, an ultra-fast polarization modulator, a polarizer, a mirror module and a reflective diffuser, when the projection module projects the image light formed by a first image light and a second image light, the image light is switched to a first polarized image light and a second polarized image light through the ultra-fast polarization modulator, and then reflected and transmitted to the reflective diffuser, so that the first polarized image light is projected to the first-eye receiving range, the second polarized image light is projected to the second-eye receiving range to form the stereoscopic effect, in particular, since the reflective diffuser is composed of a base and a plurality of micro-curved mirrors disposed on the base and designed to meet the requirements of the reflection angle, so that the reflective diffuser has a higher degree of directivity freedom.

Description

投射立體影像之投影裝置Projection device for projecting stereoscopic images

本發明係與投影裝置有關，特別係指一種投射立體影像之投影裝置。 The present invention relates to a projection device, in particular to a projection device for projecting a stereoscopic image.

現今產生立體影像的方法，主要藉由讓兩隻眼睛接收不同影像，當影像通過大腦處理後將左右眼接收的影像合併，從而產生立體視覺的效果。較早期出現過以紅色及藍色鏡片組成的色差眼鏡，後因色差眼鏡會造成無法正確看到影像正確色彩的問題，故有偏振光眼鏡或液晶快門眼鏡的產生。 The current method of generating stereoscopic images mainly generates stereoscopic effects by allowing two eyes to receive different images. Chromatic aberration glasses composed of red and blue lenses appeared earlier. Later, because the chromatic aberration glasses would cause the problem that the correct color of the image could not be seen correctly, there were polarized glasses or liquid crystal shutter glasses.

近年來，市面上也出現不必配帶眼鏡即可產生立體影像效果的投影裝置，請參閱圖1及圖2，顯示日本公告號第3526157 B2號專利『一種指向性反射影像及影像顯示裝置』，其主要由一鏡組11及一鏡頭組12共同組成一反射屏幕10，圖2中顯示鏡組11在水平方向上的剖面圖，鏡組11上具有固定的一第一反射面111及一第二反射面112，該第一反射面111具有一第一夾角θ1，該第二反射面112具有一第二夾角θ2，該第一夾角θ1及該第二夾角θ2都介於0°~90°之間，且第一夾角θ1小於第二夾角θ2，而鏡頭組12則用以散射自鏡組11反射的影像，以增加垂直方向能夠觀察到立體影像的範圍。 In recent years, projection devices that can produce stereoscopic image effects without wearing glasses have also appeared on the market. Please refer to Figures 1 and 2, which show Japanese Patent Publication No. 3526157 B2 "A Directional Reflective Image and Image Display Device". It is mainly composed of a mirror group 11 and a lens group 12 to form a reflection screen 10. FIG. 2 shows a cross-sectional view of the mirror group 11 in the horizontal direction. The mirror group 11 has a fixed first reflection surface 111 and a first reflection surface 111. Two reflecting surfaces 112, the first reflecting surface 111 has a first included angle θ 1 , the second reflecting surface 112 has a second included angle θ 2 , both the first included angle θ 1 and the second included angle θ 2 are between 0 Between ° and 90°, and the first included angle θ 1 is smaller than the second included angle θ 2 , the lens group 12 is used to scatter the image reflected from the mirror group 11 to increase the range of three-dimensional images that can be observed in the vertical direction.

藉由前述結構，投射於反射屏幕10的左眼影像及右眼影像經過鏡組11的第一反射面111及第二反射面112反射，再通過鏡頭組12擴散，使左眼影像投射至左眼，右眼影像則投射至右眼，藉此讓觀察者的左右眼分別接收不同的影像，進而達成產生立體影像的效果。 With the aforementioned structure, the left-eye image and the right-eye image projected on the reflective screen 10 are reflected by the first reflecting surface 111 and the second reflecting surface 112 of the mirror group 11 , and then diffused by the lens group 12 , so that the left-eye image is projected to the left. The right eye image is projected to the right eye, thereby allowing the left and right eyes of the observer to receive different images respectively, thereby achieving the effect of generating a stereoscopic image.

然而，前述反射屏幕10僅由二個元件組成，當反射或折射角度須調整時，則需重新製作鏡組11或鏡頭組12，其結構造成指向性自由度不佳。有鑑於此，確有必要提供一種新的技術方案，以解決前述缺陷。 However, the aforementioned reflective screen 10 is only composed of two elements. When the reflection or refraction angle needs to be adjusted, the mirror group 11 or the lens group 12 needs to be remade, which results in poor directivity freedom. In view of this, it is indeed necessary to provide a new technical solution to solve the aforementioned defects.

本發明之目的在於提供指向性自由度更佳的一種投射立體影像之投影裝置。 The purpose of the present invention is to provide a projection device for projecting a stereoscopic image with better directivity degree of freedom.

為達前述目的，本發明係一種投射立體影像之投影裝置，包含：一投影模組，穿插投射一第一影像光與一第二影像光；一超快速偏振調製器，將該第一影像光及該第二影像光轉換為一第一偏振影像光及一第二偏振影像光，該第一偏振影像光與該第二偏振影像光為偏振方向互相垂直的光線；一偏光片，反射該第一偏振影像光，並透射該第二偏振影像光；一反射鏡模組，反射該第一偏振影像光及該第二偏振影像光；以及一反射式擴散片，具有一微曲面鏡組成的陣列，該微曲面鏡將該第一偏振影像光擴散至一第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至一第二眼接收範圍。 In order to achieve the aforementioned object, the present invention is a projection device for projecting a stereoscopic image, comprising: a projection module interspersed to project a first image light and a second image light; an ultra-fast polarization modulator for the first image light and the second image light is converted into a first polarized image light and a second polarized image light, the first polarized image light and the second polarized image light are light with polarization directions perpendicular to each other; a polarizer reflects the first polarized image light a polarized image light that transmits the second polarized image light; a mirror module that reflects the first polarized image light and the second polarized image light; and a reflective diffuser with an array of micro-curved mirrors , the micro-curved mirror diffuses the first polarized image light to a first-eye receiving area, and the micro-curved mirror diffuses the second polarized image light to a second-eye receiving area.

在一較佳實施例中，當該第一影像光轉換為該第一偏振影像光，則該第二影像光轉換為該第二偏振影像光。 In a preferred embodiment, when the first image light is converted into the first polarized image light, the second image light is converted into the second polarized image light.

在一較佳實施例中，當該第一影像光轉換為該第二偏振影像光，則該第二影像光轉換為該第一偏振影像光。 In a preferred embodiment, when the first image light is converted into the second polarized image light, the second image light is converted into the first polarized image light.

在一較佳實施例中，該偏光片為反射式偏光片或偏振分光鏡。 In a preferred embodiment, the polarizer is a reflective polarizer or a polarizing beam splitter.

在一較佳實施例中，另包含一擋風玻璃，該微曲面鏡將該第一偏振影像光擴散至該擋風玻璃再反射至該第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至該擋風玻璃再反射至該第二眼接收範圍。 In a preferred embodiment, it further includes a windshield, the micro-curved mirror diffuses the first polarized image light to the windshield and reflects it to the first eye-receiving area, and the micro-curved mirror spreads the second polarized image light to the windshield. The polarized image light is diffused to the windshield and reflected to the second eye receiving area.

在一較佳實施例中，另包含設於該偏光片後的一四分之一波片，該第一偏振影像光及該第二偏振影像光通過該四分之一波片轉換成圓偏振光或橢圓偏振光。 In a preferred embodiment, it further includes a quarter-wave plate disposed behind the polarizer, and the first polarized image light and the second polarized image light are converted into circular polarization through the quarter-wave plate light or elliptically polarized light.

在一較佳實施例中，另具有一凹面鏡設置於該擋風玻璃及該反射式擴散片之間。 In a preferred embodiment, another concave mirror is disposed between the windshield and the reflective diffuser.

在一較佳實施例中，其中該反射鏡模組具有一第一反射鏡組及一第二反射鏡組，該第一反射鏡組反射該第一偏振影像光至該反射式擴散片，該第二反射鏡組反射該第二偏振影像光至該反射式擴散片。 In a preferred embodiment, wherein the reflector module has a first reflector group and a second reflector group, the first reflector group reflects the first polarized image light to the reflective diffuser, the The second mirror group reflects the second polarized image light to the reflective diffuser.

一種投射立體影像之投影裝置，包含：一投影模組，穿插投射一第一影像光與一第二影像光；一超快速偏振調製器，將該第一影像光及該第二影像光轉換為一第一偏振影像光及一第二偏振影像光，該第一偏振影像光與該第二偏振影像光為偏振方向互相垂直的光線；一偏光片，反射該第一偏振影像光，並透射該第二偏振影像光； 一反射鏡模組，反射該第二偏振影像光並穿透該偏光片；以及一反射式擴散片，具有一微曲面鏡組成的陣列，該微曲面鏡將該第一偏振影像光擴散至一第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至一第二眼接收範圍。 A projection device for projecting a stereoscopic image, comprising: a projection module interspersed to project a first image light and a second image light; an ultra-fast polarization modulator, which converts the first image light and the second image light into A first polarized image light and a second polarized image light, the first polarized image light and the second polarized image light are light with polarization directions perpendicular to each other; a polarizer reflects the first polarized image light and transmits the first polarized image light second polarized image light; a mirror module, reflecting the second polarized image light and penetrating the polarizer; and a reflective diffuser having an array of micro-curved mirrors, the micro-curved mirrors diffusing the first polarized image light to a In the first eye receiving area, the micro-curved mirror diffuses the second polarized image light to a second eye receiving area.

在一較佳實施例中，當該第一影像光轉換為該第一偏振影像光，則該第二影像光轉換為該第二偏振影像光。 In a preferred embodiment, when the first image light is converted into the first polarized image light, the second image light is converted into the second polarized image light.

在一較佳實施例中，當該第一影像光轉換為該第二偏振影像光，則該第二影像光轉換為該第一偏振影像光。 In a preferred embodiment, when the first image light is converted into the second polarized image light, the second image light is converted into the first polarized image light.

在一較佳實施例中，該偏光片為反射式偏光片。 In a preferred embodiment, the polarizer is a reflective polarizer.

在一較佳實施例中，另包含一擋風玻璃，該微曲面鏡將該第一偏振影像光擴散至該擋風玻璃再反射至該第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至該擋風玻璃再反射至該第二眼接收範圍。 In a preferred embodiment, it further includes a windshield, the micro-curved mirror diffuses the first polarized image light to the windshield and reflects it to the first eye-receiving area, and the micro-curved mirror spreads the second polarized image light to the windshield. The polarized image light is diffused to the windshield and reflected to the second eye receiving area.

在一較佳實施例中，另包含設於該偏光片後的一四分之一波片，該第一偏振影像光及該第二偏振影像光通過該四分之一波片轉換成圓偏振光或橢圓偏振光。 In a preferred embodiment, it further includes a quarter-wave plate disposed behind the polarizer, and the first polarized image light and the second polarized image light are converted into circular polarization through the quarter-wave plate light or elliptically polarized light.

在一較佳實施例中，另具有一凹面鏡設置於該擋風玻璃及該反射式擴散片之間。 In a preferred embodiment, another concave mirror is disposed between the windshield and the reflective diffuser.

在一較佳實施例中，其中該微曲面鏡為一凹面鏡或一凸面鏡。 In a preferred embodiment, the micro-curved mirror is a concave mirror or a convex mirror.

在一較佳實施例中，其中該反射式擴散片具有一基座，該基座為一曲面或一平面，而各該微曲面鏡設置於該基座上。 In a preferred embodiment, the reflective diffuser has a base, the base is a curved surface or a flat surface, and each of the micro-curved mirrors is disposed on the base.

在一較佳實施例中，其中該微曲面鏡的數量為複數個，各該微曲面鏡排列成方形陣列或蜂巢式陣列。 In a preferred embodiment, the number of the micro-curved mirrors is plural, and the micro-curved mirrors are arranged in a square array or a honeycomb array.

在一較佳實施例中，其中該微曲面鏡的邊長為25μm~0.25mm。 In a preferred embodiment, the side length of the micro-curved mirror is 25 μm˜0.25 mm.

一種投射立體影像之投影裝置，包含：一第一投影模組，投射一第一影像光；一第二投影模組，投射一第二影像光；一反射式擴散片，具有一微曲面鏡組成的陣列，該微曲面鏡將該第一影像光擴散至一第一眼接收範圍，該微曲面鏡將該第二影像光擴散至一第二眼接收範圍。 A projection device for projecting a three-dimensional image, comprising: a first projection module, projecting a first image light; a second projection module, projecting a second image light; a reflective diffuser, composed of a micro-curved mirror the array, the micro-curved mirror diffuses the first image light to a first eye-receiving area, and the micro-curved mirror diffuses the second image light to a second eye-receiving area.

在一較佳實施例中，另包含一擋風玻璃，該微曲面鏡將該第一偏振影像光擴散至該擋風玻璃再反射至該第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至該擋風玻璃再反射至該第二眼接收範圍。 In a preferred embodiment, it further includes a windshield, the micro-curved mirror diffuses the first polarized image light to the windshield and reflects it to the first eye-receiving area, and the micro-curved mirror spreads the second polarized image light to the windshield. The polarized image light is diffused to the windshield and reflected to the second eye receiving area.

在一較佳實施例中，另具有一凹面鏡設置於該擋風玻璃及該反射式擴散片之間。 In a preferred embodiment, another concave mirror is disposed between the windshield and the reflective diffuser.

在一較佳實施例中，其中該反射式擴散片具有一基座，該基座為一曲面或一平面，而各該微曲面鏡設置於該基座上。 In a preferred embodiment, the reflective diffuser has a base, the base is a curved surface or a flat surface, and each of the micro-curved mirrors is disposed on the base.

在一較佳實施例中，其中該微曲面鏡的數量為複數個，各該微曲面鏡排列成方形陣列或蜂巢式陣列。 In a preferred embodiment, the number of the micro-curved mirrors is plural, and the micro-curved mirrors are arranged in a square array or a honeycomb array.

據此，讓左眼接收第一偏振影像光或第一影像光，而右眼接收第二偏振影像光或第二影像光，以讓使用者無須配戴任何配件，即產生裸視立體影像的效果，且本創作中每一個微曲面鏡可依設計製作成符合需求的反射角度，使反射式擴散片的指向性具有非常高的自由度。 Accordingly, the left eye receives the first polarized image light or the first image light, and the right eye receives the second polarized image light or the second image light, so that the user does not need to wear any accessories to generate a naked-view stereoscopic image. In addition, each micro-curved mirror in this creation can be designed to meet the required reflection angle, so that the directivity of the reflective diffuser has a very high degree of freedom.

習知 acquaintance

10:反射屏幕 10: Reflective screen

11:鏡組 11: Mirror group

111:第一反射面 111: The first reflecting surface

112:第二反射面 112: Second reflective surface

12:鏡頭組 12: Lens group

θ1:第一夾角 θ 1 : the first included angle

θ2:第二夾角 θ 2 : the second included angle

本發明 this invention

20:投影模組 20: Projection module

20A:第一投影模組 20A: The first projection module

20B:第二投影模組 20B: The second projection module

30:超快速偏振調製器 30: Ultrafast Polarization Modulators

40:偏光片 40: polarizer

50:反射鏡模組 50: Mirror module

51:第一反射鏡組 51: The first mirror group

52:第二反射鏡組 52: The second mirror group

60:反射式擴散片 60: Reflective diffuser

61:基座 61: Pedestal

611:曲面 611: Surface

612:平面 612: Flat

62:微曲面鏡 62: Micro Curved Mirror

62A:微曲面鏡 62A: Micro-curved mirror

62B:微曲面鏡 62B: Micro Curved Mirror

62C:微曲面鏡 62C: Micro Curved Mirror

70:擋風玻璃 70: Windshield

80:四分之一波片 80: Quarter wave plate

90:凹面鏡 90: Concave mirror

DL:第一影像光 DL: First Image Light

DL’:第一偏振影像光 DL’: first polarized image light

DR:第二影像光 DR: Second Image Light

DR’:第二偏振影像光 DR’: second polarized image light

LA:第一眼接收範圍 LA: First Sight Reception Range

RA:第二眼接收範圍 RA: Second Eye Reception Range

圖1為日本公告號第3526157 B2號一種指向性反射影像及影像顯示裝置的顯示屏幕的立體圖；圖2為日本公告號第3526157 B2號一種指向性反射影像及影像顯示裝置中鏡組的橫向剖面圖；圖3為本創作第一實施例的結構示意圖；圖4為超快速偏振調製器的切換示意圖；圖5為影像光通過反射式偏光片的示意圖；圖6A為本創作中微曲面鏡以方形陣列排列於基座上的示意圖；圖6B為本創作中微曲面鏡以蜂巢式陣列排列於基座上的示意圖；圖7為本創作中微曲面鏡的尺寸示意圖；圖8為本創作中不同微曲面鏡的立體結構圖；圖9為本創作第二實施例的結構示意圖；圖10為本創作第三實施例的結構示意圖；圖11為本創作第四實施例的結構示意圖；圖12為本創作第五實施例的結構示意圖；圖13為本創作第六實施例的結構示意圖；圖14為本創作第七實施例的結構示意圖；圖15為本創作第八實施例的結構示意圖；圖16為本創作第九實施例的結構示意圖；圖17為本創作第十實施例的結構示意圖；圖18為本創作第十一實施例的結構示意圖； 圖19為本創作第十二實施例的結構示意圖；圖20為本創作第十三實施例的結構示意圖；圖21為本創作第十四實施例的結構示意圖；圖22為本創作第十五實施例的結構示意圖；圖23為本創作第十六實施例的結構示意圖；圖24為本創作的反射及折射特性之說明示意圖；圖25為本創作的反射及折射特性之說明示意圖；圖26為四分之一波片的元件特性說明示意圖；圖27為四分之一波片的元件特性說明示意圖；圖28為四分之一波片的元件特性說明示意圖；圖29為四分之一波片的元件特性說明示意圖。 Figure 1 is a perspective view of a display screen of a directional reflective image and image display device No. 3526157 B2; Figure 2 is a transverse section of a mirror group in a directional reflective image and image display device of Japanese Bulletin No. 3526157 B2 Fig. 3 is a schematic diagram of the structure of the first embodiment of the creation; Fig. 4 is a schematic diagram of the switching of the ultra-fast polarization modulator; Fig. 5 is a schematic diagram of the image light passing through the reflective polarizer; A schematic diagram of a square array arranged on a base; Figure 6B is a schematic diagram of the micro-curved mirrors arranged on the base in a honeycomb array in the creation; Figure 7 is a schematic diagram of the dimensions of the micro-curved mirrors in the creation; Figure 8 is the creation Three-dimensional structural diagrams of different micro-curved mirrors; Figure 9 is a schematic structural diagram of the second embodiment of the creation; Figure 10 is a schematic structural diagram of the third embodiment of the creation; Figure 11 is a schematic structural diagram of the fourth embodiment of the creation; Figure 12 Figure 13 is a schematic structural diagram of the sixth embodiment of the creation; Figure 14 is a schematic structural diagram of the seventh embodiment of the creation; Figure 15 is a schematic structural diagram of the eighth embodiment of the creation; Figure 16 is a schematic structural diagram of the ninth embodiment of the creation; Figure 17 is a schematic structural diagram of the tenth embodiment of the creation; Figure 18 is a schematic structural diagram of the eleventh embodiment of the creation; Figure 19 is a schematic structural diagram of the twelfth embodiment of the creation; Figure 20 is a schematic structural diagram of the thirteenth embodiment of the creation; Figure 21 is a schematic structural diagram of the fourteenth embodiment of the creation; Figure 22 is the fifteenth embodiment of the creation Figure 23 is a schematic structural diagram of the sixteenth embodiment of the creation; Figure 24 is a schematic illustration of the reflection and refraction characteristics of the creation; Figure 25 is a schematic illustration of the reflection and refraction characteristics of the creation; Figure 26 Figure 27 is a schematic diagram of the element characteristics of a quarter-wave plate; Figure 28 is a schematic diagram of the element characteristics of a quarter-wave plate; Figure 29 is a quarter-wave plate. Schematic diagram illustrating the element characteristics of the wave plate.

請參閱圖3，本創作第一實施例提供一種投射立體影像之投影裝置，其主要由一投影模組20、一超快速偏振調製器30、一偏光片40、一反射鏡模組50及一反射式擴散片60所組成，其中：該投影模組20穿插投射一第一影像光DL與一第二影像光DR，且該第一影像光DL及該第二影像光DR以120FPS(Frames Per Second)的速度進行穿插投射；該超快速偏振調製器30(Extra Fast Polarization Modulator；X-FPM)將該第一影像光DL轉換為一第一偏振影像光DL’，該第二影像光DR轉換為一第二偏振影像光DR’；請參閱圖4，該超快速偏振調製器30是指透過外部施加驅動電壓以控制光的偏振，使天然光轉換為偏振光，且具有無震動及佔地面積 小的優點，該超快速偏振調製器30的技術屬於光學領域中之通常知識，故在此不加以贅述。另有一選擇，該超快速偏振調製器30可另選擇以快速偏振調製器(Fast Polarization Modulator；FPM)替代。 Please refer to FIG. 3 , the first embodiment of the present invention provides a projection device for projecting a stereoscopic image, which mainly includes a projection module 20 , an ultra-fast polarization modulator 30 , a polarizer 40 , a mirror module 50 and a A reflective diffuser 60 is formed, wherein: the projection module 20 intersperses and projects a first image light DL and a second image light DR, and the first image light DL and the second image light DR run at 120 FPS (Frames Per The speed of the second) is interspersed and projected; the ultra-fast polarization modulator 30 (Extra Fast Polarization Modulator; X-FPM) converts the first image light DL into a first polarized image light DL', and the second image light DR converts is a second polarized image light DR'; please refer to FIG. 4, the ultra-fast polarization modulator 30 refers to applying a driving voltage from the outside to control the polarization of the light, so that the natural light is converted into polarized light, and has no vibration and occupies a space area A small advantage, the technology of the ultrafast polarization modulator 30 belongs to the common knowledge in the optical field, so it will not be repeated here. Alternatively, the ultra-fast polarization modulator 30 can be replaced by a fast polarization modulator (Fast Polarization Modulator; FPM).

該偏光片40(Polarizer)反射該第一偏振影像光DL’並透射該第二偏振影像光DR’；請參閱圖5，該偏光片40是指能夠將自然光分離成偏振光的光學元件，該偏光片40將自然光分離成兩道偏振光(互相垂直的線性偏振，或是左右相反的圓偏振方向)，其中一道偏振光能夠通過該偏光片40，另一道偏振光則被該偏光片40反射。 The polarizer 40 (Polarizer) reflects the first polarized image light DL' and transmits the second polarized image light DR'; please refer to FIG. 5 , the polarizer 40 refers to an optical element capable of separating natural light into polarized light. The polarizer 40 separates the natural light into two polarized lights (linear polarized light perpendicular to each other, or opposite circular polarization directions), one of which can pass through the polarizer 40 , and the other polarized light is reflected by the polarizer 40 .

該反射鏡模組50具有一第一反射鏡組51及一第二反射鏡組52，該第一反射鏡組51反射該第一偏振影像光DL’至該反射式擴散片60，該第二反射鏡組52反射該第二偏振影像光DR’至該反射式擴散片60。 The reflector module 50 has a first reflector group 51 and a second reflector group 52 , the first reflector group 51 reflects the first polarized image light DL' to the reflective diffuser 60 , the second reflector group 51 The mirror group 52 reflects the second polarized image light DR′ to the reflective diffuser 60 .

該反射式擴散片60具有平面的一基座61，以及位於該基座61上的一微曲面鏡62陣列，該微曲面鏡62反射該第一偏振影像光DL’至一第一眼接收範圍LA，該微曲面鏡62反射該第二偏振影像光DR’至一第二眼接收範圍RA。 The reflective diffuser 60 has a flat base 61 and an array of micro-curved mirrors 62 located on the base 61. The micro-curved mirrors 62 reflect the first polarized image light DL' to a first eye receiving range LA, the micro-curved mirror 62 reflects the second polarized image light DR' to a second eye receiving range RA.

請參閱圖6A及圖6B，在第一實施例中各該微曲面鏡62能排列成如圖6A所示之方形陣列，或是排列成如圖6B所示之蜂巢式陣列。 Please refer to FIGS. 6A and 6B. In the first embodiment, the micro-curved mirrors 62 can be arranged in a square array as shown in FIG. 6A, or in a honeycomb array as shown in FIG. 6B.

請參閱圖7，在第一實施例中各該微曲面鏡62的邊長約為25μm~0.25mm，惟該微曲面鏡62的種類繁多，第一實施例僅舉出較佳實施狀態中的尺寸，該微曲面鏡62的實際尺寸並不侷限於此。 Please refer to FIG. 7 . In the first embodiment, the side length of each of the micro-curved mirrors 62 is about 25 μm˜0.25 mm, but the micro-curved mirrors 62 are of various types. size, the actual size of the micro-curved mirror 62 is not limited to this.

在第一實施例中，為使各該微曲面鏡62能夠將第一偏振影像光DL’擴散至該第一眼接收範圍LA，並將該第二偏振影像光DR’擴散至該第二眼接收範圍RA，各該微曲面鏡62會根據裝配的實際位置而設計所需的反射角 度；圖8揭示三種具不同反射角度的微曲面鏡62A、62B、62C，各該微曲面鏡62A、62B、62C的反射角度並不以所揭示的實施例為限，其能夠根據需求將反射角度設計成任意方向，僅使各該微曲面鏡62A、62B、62C能夠將第一偏振影像光DL’擴散至該第一眼接收範圍LA，該第二偏振影像光DR’擴散至該第二眼接收範圍RA即可。 In the first embodiment, each of the micro-curved mirrors 62 can diffuse the first polarized image light DL' to the first eye receiving area LA, and diffuse the second polarized image light DR' to the second eye The receiving range RA, each of the micro-curved mirrors 62 will design the required reflection angle according to the actual position of the assembly 8 discloses three kinds of micro-curved mirrors 62A, 62B, 62C with different reflection angles, the reflection angles of each of the micro-curved mirrors 62A, 62B, 62C are not limited to the disclosed embodiments, and they can reflect The angle is designed in any direction, so that each of the micro-curved mirrors 62A, 62B, 62C can only diffuse the first polarized image light DL' to the first eye receiving area LA, and the second polarized image light DR' to the second polarized image light DR'. Eye reception range RA is sufficient.

且當該第一影像光DL轉換為該第一偏振影像光DL’，則該第二影像光DR轉換為該第二偏振影像光DR’；反之，當該第一影像光DL轉換為該第二偏振影像光DR’，則該第二影像光DR轉換為該第一偏振影像光DL’。 And when the first image light DL is converted into the first polarized image light DL', the second image light DR is converted into the second polarized image light DR'; conversely, when the first image light DL is converted into the first image light DL The second polarized image light DR' is converted into the first polarized image light DL'.

請參閱圖3，在本創作的第一個實施例中，該基座61具有一平面612，而各該微曲面鏡62為凹面鏡並陣列於該平面612上。 Please refer to FIG. 3 , in the first embodiment of the present invention, the base 61 has a flat surface 612 , and each of the micro-curved mirrors 62 is a concave mirror and is arrayed on the flat surface 612 .

請參閱圖9，在本創作的第二個實施例中，該基座61具有一曲面611，而各該微曲面鏡62為凹面鏡並陣列於該曲面611上。 Referring to FIG. 9 , in the second embodiment of the present invention, the base 61 has a curved surface 611 , and each of the micro-curved mirrors 62 is a concave mirror and is arrayed on the curved surface 611 .

請參閱圖10，在本創作的第三個實施例中，該基座61具有該平面612，而各該微曲面鏡62為凸面鏡並陣列於該平面612上。 Referring to FIG. 10 , in the third embodiment of the present invention, the base 61 has the flat surface 612 , and each of the micro-curved mirrors 62 is a convex mirror and is arrayed on the flat surface 612 .

請參閱圖11，在本創作的第四個實施例中，該基座61具有該曲面611，而各該微曲面鏡62為凸面鏡並陣列於該曲面611上。 Referring to FIG. 11 , in the fourth embodiment of the present invention, the base 61 has the curved surface 611 , and each of the micro-curved mirrors 62 is a convex mirror and is arrayed on the curved surface 611 .

請參閱圖12，在本創作的第五個實施例中，另具有一擋風玻璃70，該反射式擴散片60將該第一偏振影像光DL’及該第二偏振影像光DR’反射至該擋風玻璃70，該第一偏振影像光DL’及該第二偏振影像光DR’再透過該擋風玻璃70折射至該第一眼接收範圍LA及該第二眼接收範圍RA，在實際汽車應用中，光路的設計上，通常最後會透過前擋風玻璃或是貼附反射膜的擋風玻璃的反射再進入使用者眼睛。因為光在兩種各向同性介電質的分界面上反射 和折射時，光的偏振狀態會改變。反射光和折射光會有部分偏振，而且在反射光中垂直於入射面的光振動(S波)要多於平行振動(P波)，而折射光則相反。也因此擋風玻璃70上P波的反射量較小，而S波的反射量較大，如此會導致使用者雙眼接收的影像光亮度不同，而影響畫面品質。 Please refer to FIG. 12, in the fifth embodiment of the present invention, there is another windshield 70, the reflective diffuser 60 reflects the first polarized image light DL' and the second polarized image light DR' to the The windshield glass 70, the first polarized image light DL' and the second polarized image light DR' are then refracted through the windshield glass 70 to the first eye receiving area LA and the second eye receiving area RA. In automotive applications, in the design of the light path, it usually passes through the front windshield or the reflection of the windshield with a reflective film and then enters the user's eyes. Because light is reflected at the interface between two isotropic dielectrics And when refracted, the polarization state of light changes. Reflected and refracted light are partially polarized, and in reflected light the vibrations (S-waves) perpendicular to the plane of incidence are more than parallel vibrations (P-waves), while the opposite is true for refracted light. Therefore, the amount of reflection of the P wave on the windshield 70 is relatively small, while the amount of reflection of the S wave is relatively large, so that the brightness of the image received by the user's eyes is different, which affects the picture quality.

請參閱圖13，在本創作的第六個實施例中，具有該擋風玻璃70，且另具設於該偏光片40後的一四分之一波片80，四分之一波片是一種相位延遲片，由雙折射材料製成，雙折射的光學性質就是當光線射入後，光線會有兩個不同方向的折射。波片通常由石英晶體(SiO2)製作，因為它在很大的波長範圍內具有很高的透明度，並且具有很高的光學品質。還有一些其它的材料(應用於其它波長範圍)可以，例如方解石(CaCO3)、氟化鎂(MgF2)、藍寶石(Al2O3)，雲母(一種二氧化矽材料)和一些雙折射聚合物等等。利用材料的各向異性特點，對不同偏振方向的光有不同的折射率與傳播速度，從而造成兩個分量相位差，而四分之一波片80就是控制材料和厚度使光經過四分之一波片80後，兩個不同偏振方向的光產生1/4波長的相位差。四分之一波片80根據材質有所謂的「光軸(optic axis)」，當一個線偏振光射入時，他的振動會被分解成兩個方向的振動：其中一個是光軸(快速軸fast axis)的方向，成為尋常波(ordinary ray,o-ray)，另一個則是和光軸垂直(慢速軸slow axis)的方向，成為異常波(extraordinary ray,e-ray)。在本實施例中，該四分之一波片80設於該反射鏡模組50及該反射式擴散片60之間，使該反射鏡模組50反射出的該第一偏振影像光DL’及該第二偏振影像光DR’穿透該四分之一波片80至該反射式擴散片60，再由反射式擴散片60反射至該擋風玻璃70，該第一偏振影像光DL’及該第二偏振影像光DR’再透過該擋風玻璃70反射至該第一眼接收範圍LA及該第二眼接 收範圍RA，搭配設計過的光軸角度，讓該第一偏振影像光DL’與該第二偏振影像光DR’，經由四分之一波片80都轉換成圓偏振光。圓偏振光可分解成P偏振方向影像光與S偏振方向影像光方向的分量，兩者具有相同振幅。圓偏振第一偏振影像光DL’與圓偏振第二偏振影像光DR’，因為擋風玻璃70反射產生的影響一致，因此仍可保有兩者相同的亮度。最後使用者接收到相同亮度的第一偏振影像光DL’與第二偏振影像光DR’產生立體影像，而不影響畫面品質，然而第一偏振影像光DL’與第二偏振影像光DR’的光路不相同，因此整個光路的衰減量有差異，透過調整四分之一波片80光軸角度，讓第一與第二偏振影像光DL’、DR’，經由四分之一波片80都轉換成橢圓偏振光。橢圓偏振光也可分解成P波與S波方向的分量，但兩者具有不同振幅。加上擋風玻璃70對P波與S波反射量的差異，可藉此來補償整體光路衰減量的差異，讓最終使用者收到的第一與第二偏振第二影像光DL’、DR’亮度一致。 Please refer to FIG. 13 , in the sixth embodiment of the present invention, there is the windshield 70 and a quarter-wave plate 80 disposed behind the polarizer 40. The quarter-wave plate is A phase retarder made of birefringent material. The optical property of birefringence is that when light enters, the light will be refracted in two different directions. Waveplates are usually made of quartz crystal (SiO2) because of its high transparency over a large wavelength range and high optical quality. There are also other materials (for other wavelength ranges) available, such as calcite (CaCO3), magnesium fluoride (MgF2), sapphire (Al2O3), mica (a silica material) and some birefringent polymers, to name a few. Using the anisotropic characteristics of materials, light in different polarization directions has different refractive indices and propagation speeds, resulting in a phase difference between the two components, and the quarter-wave plate 80 is to control the material and thickness to make the light pass through the quarter After a wave plate 80, two different polarization directions produce a phase difference of 1/4 wavelength. The quarter-wave plate 80 has a so-called "optic axis" according to the material. When a linearly polarized light enters, its vibration will be decomposed into vibrations in two directions: one is the optical axis (fast The direction of the fast axis) becomes the ordinary wave (ordinary ray, o-ray), and the other direction is perpendicular to the optical axis (slow axis), which becomes the abnormal wave (extraordinary ray, e-ray). In this embodiment, the quarter wave plate 80 is disposed between the mirror module 50 and the reflective diffuser 60 , so that the first polarized image light DL′ reflected by the mirror module 50 And the second polarized image light DR' penetrates the quarter wave plate 80 to the reflective diffuser 60, and is then reflected by the reflective diffuser 60 to the windshield 70, the first polarized image light DL' And the second polarized image light DR' is reflected through the windshield 70 to the first eye receiving area LA and the second eye contact The receiving range RA is matched with the designed optical axis angle, so that the first polarized image light DL' and the second polarized image light DR' are both converted into circularly polarized light through the quarter-wave plate 80. The circularly polarized light can be decomposed into components of the image light in the P-polarized direction and the image light in the S-polarized direction, both of which have the same amplitude. The circularly polarized first polarized image light DL' and the circularly polarized second polarized image light DR' can still maintain the same brightness due to the same effect caused by the reflection of the windshield 70 . Finally, the user receives the first polarized image light DL' and the second polarized image light DR' with the same brightness to generate a three-dimensional image without affecting the picture quality, but the first polarized image light DL' and the second polarized image light DR' The optical paths are not the same, so the attenuation of the entire optical path is different. By adjusting the angle of the optical axis of the quarter-wave plate 80, the first and second polarized image lights DL' and DR' can pass through the quarter-wave plate 80. Converted to elliptically polarized light. Elliptically polarized light can also be decomposed into components in the P-wave and S-wave directions, but the two have different amplitudes. In addition, the difference in the reflection amount of the P wave and the S wave by the windshield 70 can be used to compensate the difference in the attenuation of the overall optical path, so that the first and second polarized second image lights DL', DR received by the end user 'The brightness is consistent.

請參閱圖14，在本創作的第七個實施例中，具有該擋風玻璃70及該四分之一波片80，且另具有一凹面鏡90，該反射式擴散片60反射該第一偏振影像光DL’及該第二偏振影像光DR’至該凹面鏡90，該第一偏振影像光DL’及該第二偏振影像光DR’經過凹面鏡90反射至該擋風玻璃70，再從該擋風玻璃70反射至該第一眼接收範圍LA及該第二眼接收範圍RA，搭配設計過的光軸角度，讓該第一偏振方向影像光與該第二偏振方向影像光，經由四分之一波片80都轉換成圓偏振光。圓偏振光可分解成P偏振方向影像光與S偏振方向影像光方向的分量，兩者具有相同振幅。圓偏振第一偏振影像光DL’與圓偏振第二偏振影像光DR’，因為前擋風玻璃反射產生的影響一致，因此仍可保有兩者相同的亮度。最後使用者接收到相同亮度的第一偏振影像光DL’與第二偏振影 像光DR’產生立體影像，而不影響畫面品質，然而第一偏振影像光DL’與第二偏振影像光DR’的光路不相同，因此整個光路的衰減量有差異，透過調整四分之一波片組80光軸角度，讓第一偏振與第一偏振影像光DL’、DR’，經由四分之一波片都轉換成橢圓偏振光。橢圓偏振光也可分解成P波與S波方向的分量，但兩者具有不同振幅。加上前擋風玻璃對P波與S波反射量的差異，可藉此來補償整體光路衰減量的差異，讓最終使用者收到的第一與第二偏振影像光DL’、DR’亮度一致。 Please refer to FIG. 14 , in the seventh embodiment of the present invention, the windshield glass 70 and the quarter-wave plate 80 are provided, and a concave mirror 90 is further provided, and the reflective diffuser 60 reflects the first polarization The image light DL' and the second polarized image light DR' are sent to the concave mirror 90. The first polarized image light DL' and the second polarized image light DR' are reflected by the concave mirror 90 to the windshield 70, and then pass through the windshield 70. The wind glass 70 is reflected to the first-eye receiving area LA and the second-eye receiving area RA, and is matched with the designed optical axis angle, so that the image light in the first polarization direction and the image light in the second polarization direction pass through a quarter A wave plate 80 is converted into circularly polarized light. The circularly polarized light can be decomposed into components of the image light in the P-polarized direction and the image light in the S-polarized direction, both of which have the same amplitude. The circularly polarized first polarized image light DL' and the circularly polarized second polarized image light DR' can still maintain the same brightness because of the same effect caused by the reflection of the front windshield. Finally, the user receives the first polarized image light DL' and the second polarized image light with the same brightness. The image light DR' produces a three-dimensional image without affecting the picture quality. However, the optical paths of the first polarized image light DL' and the second polarized image light DR' are different, so the attenuation of the entire optical path is different. The angle of the optical axis of the wave plate group 80 allows the first polarization and the first polarization image light DL', DR' to be converted into elliptically polarized light through the quarter wave plate. Elliptically polarized light can also be decomposed into components in the P-wave and S-wave directions, but the two have different amplitudes. In addition to the difference in the reflection of the P wave and the S wave by the front windshield, the difference in the attenuation of the overall optical path can be compensated for, so that the end user receives the first and second polarized image light DL', DR' brightness Consistent.

請參閱圖15，在本創作第八個實施例中，該偏光片40透射該第一偏振影像光DL’，並反射該第二偏振影像光DR’，該反射鏡模組50反射該第一偏振影像光DL’並穿透該偏光片40，再透過反射式擴散片60將該第一偏振影像光DL’及該第二偏振影像光DR’反射至該第一眼接收範圍LA及該第二眼接收範圍RA。在此第八個實施例中，該反射式擴散片60的基座61為平面，而各該微曲面鏡62為凹面鏡，但不限於此，基座61可以是曲面，或微曲面鏡62可以是凸面鏡。 Referring to FIG. 15, in the eighth embodiment of the present invention, the polarizer 40 transmits the first polarized image light DL' and reflects the second polarized image light DR', and the reflector module 50 reflects the first polarized image light DL' The polarized image light DL' passes through the polarizer 40, and then transmits the first polarized image light DL' and the second polarized image light DR' through the reflective diffuser 60 to reflect the first polarized image light DL' and the second polarized image light DR' to the first eye receiving area LA and the second Second eye receptive range RA. In the eighth embodiment, the base 61 of the reflective diffuser 60 is a plane, and each of the micro-curved mirrors 62 is a concave mirror, but not limited to this, the base 61 may be a curved surface, or the micro-curved mirror 62 may be is a convex mirror.

請參閱圖16，在本創作第九個實施例中，該偏光片40透射該第一偏振影像光DL’，並反射該第二偏振影像光DR’，該反射鏡模組50反射該第一偏振影像光DL’並穿透該偏光片40，再透過反射式擴散片60將該第一偏振影像光DL’及該第二偏振影像光DR’反射至該第一眼接收範圍LA及該第二眼接收範圍RA。在此第九個實施例中，該反射式擴散片60的基座61為曲面，而各該微曲面鏡62為凸面鏡，但不限於此，基座61可以是平面，或微曲面鏡62可以是凹面鏡。 Referring to FIG. 16, in the ninth embodiment of the present invention, the polarizer 40 transmits the first polarized image light DL' and reflects the second polarized image light DR', and the mirror module 50 reflects the first polarized image light DL' The polarized image light DL' passes through the polarizer 40, and then transmits the first polarized image light DL' and the second polarized image light DR' through the reflective diffuser 60 to reflect the first polarized image light DL' and the second polarized image light DR' to the first eye receiving area LA and the second Second eye receptive range RA. In the ninth embodiment, the base 61 of the reflective diffuser 60 is a curved surface, and each of the micro-curved mirrors 62 is a convex mirror, but not limited to this, the base 61 may be a plane, or the micro-curved mirror 62 may be is a concave mirror.

請參閱圖17，在本創作第十個實施例中，具有該擋風玻璃70，該偏光片40透射該第一偏振影像光DL’，並反射該第二偏振影像光DR’，該反射鏡模組50反射該第一偏振影像光DL’並穿透該偏光片40，再透過反射式擴散片60將該第一偏振影像光DL’及該第二偏振影像光DR’反射至該擋風玻璃70，透過該擋風玻璃70將該第一偏振影像光DL’及該第二偏振影像光DR’反射至該第一眼接收範圍LA及該第二眼接收範圍RA。 Referring to FIG. 17, in the tenth embodiment of the present invention, with the windshield 70, the polarizer 40 transmits the first polarized image light DL' and reflects the second polarized image light DR', and the reflector The module 50 reflects the first polarized image light DL' and penetrates the polarizer 40, and then reflects the first polarized image light DL' and the second polarized image light DR' to the windshield through the reflective diffuser 60 The glass 70 reflects the first polarized image light DL' and the second polarized image light DR' to the first eye receiving area LA and the second eye receiving area RA through the windshield glass 70 .

請參閱圖18，在本創作第十一個實施例中，具有該擋風玻璃70及該四分之一波片80，該偏光片40透射該第一偏振影像光DL’，並反射該第二偏振影像光DR’，該反射鏡模組50反射該第一偏振影像光DL’並穿透該偏光片40，再透過該四分之一波片80將該第一偏振影像光DL’及該第二偏振影像光DR’透射至反射式擴散片60，該第一偏振影像光DL’及該第二偏振影像光DR’被該反射式擴散片60反射至該擋風玻璃70，該擋風玻璃70反射該第一偏振影像光DL’及該第二偏振影像光DR’至該第一眼接收範圍LA及該第二眼接收範圍RA。 Please refer to FIG. 18 , in the eleventh embodiment of the present invention, the windshield 70 and the quarter wave plate 80 are provided, and the polarizer 40 transmits the first polarized image light DL' and reflects the first polarized image light DL'. Two polarized image light DR', the mirror module 50 reflects the first polarized image light DL' and penetrates the polarizer 40, and then transmits the first polarized image light DL' through the quarter wave plate 80 and The second polarized image light DR' is transmitted to the reflective diffuser 60 , the first polarized image light DL' and the second polarized image light DR' are reflected by the reflective diffuser 60 to the windshield 70 . The wind glass 70 reflects the first polarized image light DL' and the second polarized image light DR' to the first eye receiving area LA and the second eye receiving area RA.

請參閱圖19，在本創作的第十二個實施例中，具有該擋風玻璃70、該四分之一波片80及該凹面鏡90，該偏光片40透射該第一偏振影像光DL’，並反射該第二偏振影像光DR’，該反射鏡模組50反射該第一偏振影像光DL’並穿透該偏光片40，再透過四分之一波片80將該第一偏振影像光DL’及該第二偏振影像光DR’透射至該反射式擴散片60，該第一偏振影像光DL’及該第二偏振影像光DR’被該反射式擴散片60反射至該凹面鏡90，透過該凹面鏡90反射該第一偏振影像光DL’及該第二偏振影像光DR’至該擋風玻璃70，最 後由該擋風玻璃反射該第一偏振影像光DL’及該第二偏振影像光DR’至該第一眼接收範圍LA及該第二眼接收範圍RA。 Please refer to FIG. 19 , in the twelfth embodiment of the present invention, there is the windshield 70 , the quarter wave plate 80 and the concave mirror 90 , the polarizer 40 transmits the first polarized image light DL′ , and reflect the second polarized image light DR', the mirror module 50 reflects the first polarized image light DL' and penetrates the polarizer 40, and then transmits the first polarized image through the quarter-wave plate 80 The light DL' and the second polarized image light DR' are transmitted to the reflective diffuser 60, and the first polarized image light DL' and the second polarized image light DR' are reflected by the reflective diffuser 60 to the concave mirror 90 , reflecting the first polarized image light DL' and the second polarized image light DR' to the windshield 70 through the concave mirror 90, and finally Then, the first polarized image light DL' and the second polarized image light DR' are reflected by the windshield to the first eye receiving area LA and the second eye receiving area RA.

請參閱圖20，在本創作的第十三個實施例中，該投射立體影像之投影裝置，主要由一第一投影模組20A、一第二投影模組20B及該反射式擴散片60組成，其中：該第一投影模組20A投射一第一影像光DL；該第二投影模組20B投射一第二影像光DR；該反射式擴散片60具有平面的該基座61，以及陣列於該基座61上的該微曲面鏡62，該微曲面鏡62將該第一影像光DL擴散至該第一眼接收範圍LA，該微曲面鏡62將該第二影像光DR擴散至該第二眼接收範圍RA。在此第十三個實施例中，該反射式擴散片60的基座61為平面，而各該微曲面鏡62為凹面鏡，但不限於此，基座61可以是曲面，或微曲面鏡62可以是凸面鏡。 Please refer to FIG. 20 , in the thirteenth embodiment of the present invention, the projection device for projecting stereoscopic images is mainly composed of a first projection module 20A, a second projection module 20B and the reflective diffuser 60 , wherein: the first projection module 20A projects a first image light DL; the second projection module 20B projects a second image light DR; the reflective diffuser 60 has the flat base 61 and is arrayed on The micro-curved mirror 62 on the base 61, the micro-curved mirror 62 diffuses the first image light DL to the first eye receiving area LA, the micro-curved mirror 62 diffuses the second image light DR to the first image light DR Second eye receptive range RA. In the thirteenth embodiment, the base 61 of the reflective diffuser 60 is a plane, and each of the micro-curved mirrors 62 is a concave mirror, but not limited to this, the base 61 can be a curved surface, or a micro-curved mirror 62 Can be a convex mirror.

由於該第一投影模組20A及該第二投影模組20B分開投射該第一影像光DL及該第二影像光DR，相較於本創作的第一個實施例，本創作的第十三個實施例大幅減少所需使用的元件，且同樣能夠達成產生投射立體影像之效果。 Since the first projection module 20A and the second projection module 20B project the first image light DL and the second image light DR separately, compared with the first embodiment of the present invention, the thirteenth embodiment of the present invention This embodiment greatly reduces the required components, and can also achieve the effect of generating a projected stereoscopic image.

請參閱圖21，本創作的第十四個實施例係基於第十三個實施例的結構組態之改變，在本創作的第十四個實施例中，該反射式擴散片60的基座61為曲面，而各該微曲面鏡62為凸面鏡。在此第十四個實施例中，該反射式擴散片60的基座61為曲面，而各該微曲面鏡62為凸面鏡，但不限於此，基座61可以是平面，或微曲面鏡62可以是凹面鏡。 Referring to FIG. 21 , the fourteenth embodiment of the present invention is based on the change of the structural configuration of the thirteenth embodiment. In the fourteenth embodiment of the present invention, the base of the reflective diffuser 60 is 61 is a curved surface, and each of the micro-curved mirrors 62 is a convex mirror. In this fourteenth embodiment, the base 61 of the reflective diffuser 60 is a curved surface, and each of the micro-curved mirrors 62 is a convex mirror, but not limited to this, the base 61 can be a plane, or a micro-curved mirror 62 Can be a concave mirror.

請參閱圖22，在本創作的第十五個實施例中，係基於第十三個實施例的結構組態之改變，在本創作的第十五個實施例中，另具有該擋風玻璃70，該反射式擴散片60反射該第一影像光DL及該第二影像光DR至該擋風玻璃70，再透過該擋風玻璃70反射該第一影像光DL及該第二影像光DR至該第一眼接收範圍LA及該第二眼接收範圍RA。 Please refer to FIG. 22. In the fifteenth embodiment of the present invention, it is based on the change of the structural configuration of the thirteenth embodiment. In the fifteenth embodiment of the present invention, the windshield is additionally provided. 70. The reflective diffuser 60 reflects the first image light DL and the second image light DR to the windshield 70, and then reflects the first image light DL and the second image light DR through the windshield 70 to the first-eye receiving area LA and the second-eye receiving area RA.

請參閱圖23，在本創作的第十六個實施例中，係基於第十三個實施例的結構組態之改變，在本創作的第十六個實施例中，另具有該擋風玻璃70及該凹面鏡90，該反射式擴散片60反射該第一影像光DL及該第二影像光DR至該凹面鏡90，再透過該凹面鏡90反射該第一影像光DL及該第二影像光DR至該擋風玻璃70，最後由該擋風玻璃70將該第一影像光DL及該第二影像光DR反射至該第一眼接收範圍LA及該第二眼接收範圍RA。 Please refer to FIG. 23. In the sixteenth embodiment of the present invention, it is based on the change of the structural configuration of the thirteenth embodiment. In the sixteenth embodiment of the present invention, the windshield is additionally provided. 70 and the concave mirror 90, the reflective diffuser 60 reflects the first image light DL and the second image light DR to the concave mirror 90, and then reflects the first image light DL and the second image light DR through the concave mirror 90 To the windshield glass 70 , the first image light DL and the second image light DR are finally reflected by the windshield glass 70 to the first eye receiving area LA and the second eye receiving area RA.

值得一提的是，請參閱圖24，可見光由空氣入射到玻璃的介面上，會隨著入射角度變大，P波的反射量會漸漸減小，直到布魯斯特角時P波為完全折射而不反射，而此時反射波中只剩下S波，反射線與折射線的夾角呈90度。布魯斯特角可由兩介質的折射率推導出，若第一介質的折射率為n1，第二介質的折射率為n2，則布魯斯特角：θB=arctan(n2/n1)。如圖25，當第一介質為折射率1的空氣，第二介質為折射率1.5的玻璃，由不同入射角的P波與S波的反射強度量測曲線也可看出布魯斯特角，在此入射角度時，P波的反射量為0。 It is worth mentioning that, please refer to Figure 24, the visible light incident on the glass interface from the air will increase as the incident angle increases, and the amount of reflection of the P wave will gradually decrease until the P wave is completely refracted at the Brewster angle. No reflection, and only the S wave remains in the reflected wave at this time, and the angle between the reflection line and the refraction line is 90 degrees. The Brewster angle can be derived from the refractive indices of the two media. If the refractive index of the first medium is n1 and the refractive index of the second medium is n2, then the Brewster angle: θ B =arctan(n2/n1). As shown in Figure 25, when the first medium is air with a refractive index of 1, and the second medium is glass with a refractive index of 1.5, the Brewster angle can also be seen from the measurement curves of the reflection intensities of the P and S waves at different incident angles. At this incident angle, the amount of reflection of the P wave is zero.

特別的是，如圖26及27所示，當射入四分之一波片80的偏振光和光軸平行或垂直(和光軸夾角為0度或90度)時，會因為另一個方向的振幅為零，而維持原來的線偏振光的，就是沒有被分解成兩個方向。如圖28所示，當偏振光和光軸夾角是45度時，分解出來兩個方向的振幅會相等，加上產生 的四分之一的相位差，在快速軸與慢速軸兩個方向的波合成後，就會產生出一個振動方向會旋轉的波，也就是所謂的圓偏振光；但如果是其他角度的話，則會因為分解出來兩個方向的振幅不同，而變成橢圓偏振光。如圖29所示，將此圓偏振光或橢圓偏振光射入四分之一波片80，也可以再轉換為原有方向的線偏振光。 In particular, as shown in Figures 26 and 27, when the polarized light incident on the quarter-wave plate 80 is parallel or perpendicular to the optical axis (the angle between the optical axis and the optical axis is 0 degrees or 90 degrees), the amplitude in the other direction will be is zero, and the original linearly polarized light is maintained, that is, it is not decomposed into two directions. As shown in Figure 28, when the angle between the polarized light and the optical axis is 45 degrees, the amplitudes in the two directions will be equal. A quarter of the phase difference, after the waves in the two directions of the fast axis and the slow axis are combined, a wave whose vibration direction will rotate, which is the so-called circularly polarized light; but if it is at other angles , it will become elliptically polarized light because the amplitudes in the two directions are different. As shown in FIG. 29 , the circularly polarized light or the elliptically polarized light is injected into the quarter-wave plate 80, and it can also be converted into linearly polarized light in the original direction.

據此，該第一偏振方向影像光與該第二偏振方向影像光各以不同光路與角度抵達該反射式擴散片，讓左眼接收第一偏振影像光DL’或第一影像光DL，而右眼接收第二偏振影像光DR’或第二影像光DR，以讓使用者無須配戴任何配件，即產生裸視立體影像的效果，且本創作中每一個微曲面鏡62可依設計製作成符合需求的反射角度，使反射式擴散片60的指向性具有非常高的自由度。 Accordingly, the image light in the first polarization direction and the image light in the second polarization direction reach the reflective diffuser through different optical paths and angles, so that the left eye receives the first polarization image light DL' or the first image light DL, and The right eye receives the second polarized image light DR' or the second image light DR, so that the user does not need to wear any accessories to produce the effect of a naked-view stereoscopic image, and each micro-curved mirror 62 in this creation can be made according to the design By forming a reflection angle that meets the requirements, the directivity of the reflective diffuser 60 has a very high degree of freedom.

20:投影模組20: Projection module

30:超快速偏振調製器30: Ultrafast Polarization Modulators

40:偏光片40: polarizer

50:反射鏡模組50: Mirror module

51:第一反射鏡組51: The first mirror group

52:第二反射鏡組52: The second mirror group

60:反射式擴散片60: Reflective diffuser

61:基座61: Pedestal

62:微曲面鏡62: Micro Curved Mirror

DL’:第一偏振影像光DL’: first polarized image light

DR’:第二偏振影像光DR’: second polarized image light

Claims (15)

一種投射立體影像之投影裝置，包含：一投影模組，穿插投射一第一影像光與一第二影像光；一超快速偏振調製器，將該第一影像光及該第二影像光轉換為一第一偏振影像光及一第二偏振影像光，該第一偏振影像光與該第二偏振影像光為偏振方向互相垂直的光線；一偏光片，反射該第一偏振影像光，並透射該第二偏振影像光；一反射鏡模組，反射該第一偏振影像光及該第二偏振影像光；以及一反射式擴散片，具有陣列的複數個微曲面鏡，該微曲面鏡將該第一偏振影像光擴散至一第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至一第二眼接收範圍。 A projection device for projecting a three-dimensional image, comprising: a projection module interspersed to project a first image light and a second image light; an ultra-fast polarization modulator, which converts the first image light and the second image light into a first polarized image light and a second polarized image light, the first polarized image light and the second polarized image light are light with polarization directions perpendicular to each other; a polarizer reflects the first polarized image light and transmits the first polarized image light second polarized image light; a mirror module reflecting the first polarized image light and the second polarized image light; and a reflective diffuser having a plurality of micro-curved mirrors in an array, the micro-curved mirrors reflecting the first polarized image light A polarized image light is diffused to a first eye receiving area, and the micro-curved mirror diffuses the second polarized image light to a second eye receiving area. 如請求項1所述之投射立體影像之投影裝置，其中，當該第一影像光轉換為該第一偏振影像光，則該第二影像光轉換為該第二偏振影像光。 The projection device for projecting a stereoscopic image as claimed in claim 1, wherein when the first image light is converted into the first polarized image light, the second image light is converted into the second polarized image light. 如請求項1所述之投射立體影像之投影裝置，其中，當該第一影像光轉換為該第二偏振影像光，則該第二影像光轉換為該第一偏振影像光。 The projection device for projecting a stereoscopic image as claimed in claim 1, wherein when the first image light is converted into the second polarized image light, the second image light is converted into the first polarized image light. 如請求項1所述之投射立體影像之投影裝置，其中，該偏光片為反射式偏光片或偏振分光鏡。 The projection device for projecting stereoscopic images according to claim 1, wherein the polarizer is a reflective polarizer or a polarizing beam splitter. 如請求項1所述之投射立體影像之投影裝置，另包含一擋風玻璃，該反射式擴散片將該第一偏振影像光及該第二偏振影像光擴散至該擋風玻璃再反射至該第一眼接收範圍及該第二眼接收範圍。 The projection device for projecting a stereoscopic image as claimed in claim 1, further comprising a windshield, and the reflective diffuser diffuses the first polarized image light and the second polarized image light to the windshield and reflects them to the windshield The first eye receiving range and the second eye receiving range. 如請求項5所述之投射立體影像之投影裝置，另包含設於該偏光片後的一四分之一波片，該第一偏振影像光及該第二偏振影像光通過該四分之 一波片轉換成圓偏振光或橢圓偏振光，再使該第一偏振影像光及該第二偏振影像光透射至該反射式擴散片。 The projection device for projecting a stereoscopic image as claimed in claim 5, further comprising a quarter-wave plate disposed behind the polarizer, the first polarized image light and the second polarized image light passing through the quarter A wave plate is converted into circularly polarized light or elliptically polarized light, and then the first polarized image light and the second polarized image light are transmitted to the reflective diffuser. 如請求項5或6所述之投射立體影像之投影裝置，另具有一凹面鏡設置於該擋風玻璃及該反射式擴散片之間。 The projection device for projecting a stereoscopic image as claimed in claim 5 or 6 further has a concave mirror disposed between the windshield and the reflective diffuser. 如請求項1所述之投射立體影像之投影裝置，其中該反射鏡模組具有一第一反射鏡組及一第二反射鏡組，該第一反射鏡組反射該第一偏振影像光至該反射式擴散片，該第二反射鏡組反射該第二偏振影像光至該反射式擴散片。 The projection device for projecting a stereoscopic image as claimed in claim 1, wherein the mirror module has a first mirror group and a second mirror group, and the first mirror group reflects the first polarized image light to the A reflective diffuser, the second mirror group reflects the second polarized image light to the reflective diffuser. 一種投射立體影像之投影裝置，包含：一投影模組，穿插投射一第一影像光與一第二影像光；一超快速偏振調製器，將該第一影像光及該第二影像光轉換為一第一偏振影像光及一第二偏振影像光，該第一偏振影像光與該第二偏振影像光為偏振方向互相垂直的光線；一偏光片，透射該第一偏振影像光，並反射該第二偏振影像光；一反射鏡模組，反射該第一偏振影像光並穿透該偏光片；以及一反射式擴散片，具有陣列的複數個微曲面鏡，該微曲面鏡將該第一偏振影像光擴散至一第一眼接收範圍，該微曲面鏡將該第二偏振影像光擴散至一第二眼接收範圍。 A projection device for projecting a three-dimensional image, comprising: a projection module interspersed to project a first image light and a second image light; an ultra-fast polarization modulator, which converts the first image light and the second image light into a first polarized image light and a second polarized image light, the first polarized image light and the second polarized image light are light with polarization directions perpendicular to each other; a polarizer transmits the first polarized image light and reflects the a second polarized image light; a mirror module reflecting the first polarized image light and penetrating the polarizer; and a reflective diffuser having a plurality of micro-curved mirrors in an array, the micro-curved mirrors reflecting the first polarized image light The polarized image light is diffused to a first eye receiving area, and the micro-curved mirror diffuses the second polarized image light to a second eye receiving area. 如請求項9所述之投射立體影像之投影裝置，其中，當該第一影像光轉換為該第一偏振影像光，則該第二影像光轉換為該第二偏振影像光。 The projection device for projecting a stereoscopic image as claimed in claim 9, wherein when the first image light is converted into the first polarized image light, the second image light is converted into the second polarized image light. 如請求項9所述之投射立體影像之投影裝置，其中，當該第一影像光轉換為該第二偏振影像光，則該第二影像光轉換為該第一偏振影像光。 The projection device for projecting a stereoscopic image as claimed in claim 9, wherein when the first image light is converted into the second polarized image light, the second image light is converted into the first polarized image light. 如請求項9所述之投射立體影像之投影裝置，其中，該偏光片為反射式偏光片。 The projection device for projecting a stereoscopic image as claimed in claim 9, wherein the polarizer is a reflective polarizer. 如請求項9所述之投射立體影像之投影裝置，另包含一擋風玻璃，該反射式擴散片將該第一偏振影像光及該第二偏振影像光反射擴散至該擋風玻璃再反射至該第一眼接收範圍及該第二眼接收範圍。 The projection device for projecting a three-dimensional image as claimed in claim 9, further comprising a windshield, and the reflective diffuser reflects and diffuses the first polarized image light and the second polarized image light to the windshield and then reflects to the windshield. The first eye receiving range and the second eye receiving range. 如請求項13所述之投射立體影像之投影裝置，另包含設於該偏光片後的一四分之一波片，該第一偏振影像光及該第二偏振影像光通過該四分之一波片轉換成圓偏振光或橢圓偏振光，再使該第一偏振影像光及該第二偏振影像光透射至該反射式擴散片。 The projection device for projecting a stereoscopic image as claimed in claim 13, further comprising a quarter-wave plate disposed behind the polarizer, the first polarized image light and the second polarized image light passing through the quarter The wave plate is converted into circularly polarized light or elliptically polarized light, and then the first polarized image light and the second polarized image light are transmitted to the reflective diffuser. 如請求項13或14所述之投射立體影像之投影裝置，另具有一凹面鏡設置於該擋風玻璃及該反射式擴散片之間。 The projection device for projecting a stereoscopic image as claimed in claim 13 or 14 further has a concave mirror disposed between the windshield and the reflective diffuser.
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