CN102004387B - Full screen projection system with double helix screen - Google Patents
Full screen projection system with double helix screen Download PDFInfo
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- CN102004387B CN102004387B CN2010102841751A CN201010284175A CN102004387B CN 102004387 B CN102004387 B CN 102004387B CN 2010102841751 A CN2010102841751 A CN 2010102841751A CN 201010284175 A CN201010284175 A CN 201010284175A CN 102004387 B CN102004387 B CN 102004387B
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- 230000003287 optical effect Effects 0.000 claims abstract description 39
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Abstract
本发明涉及一种双螺旋屏幕全屏投影系统,由投影装置和旋转双螺旋屏幕组成,所述投影装置位于旋转双螺旋屏幕上方,通过调整投影装置的空间位置,使得投影装置和双螺旋屏幕之间的相对位置使得投影装置上的镜头投射出的投影图像光路的中心与双螺旋屏幕的中心重合,同时使得投影图像光路下端长方形图像面内接于双螺旋屏幕俯视圆面,在旋转双螺旋屏幕上实现圆柱体内全屏投影显示。本发明采用的结构易于实现;并将含有一定震动的旋转双螺旋屏幕和投影装置分离,增加了成像的稳定性;不需要额外的光学器件改变光路,减少了由此带来的对准误差,可以得到清楚的真三维图像。
The invention relates to a double-helix screen full-screen projection system, which is composed of a projection device and a rotating double-helix screen. The projection device is located above the rotating double-helix screen. The relative position makes the center of the projection image optical path projected by the lens on the projection device coincide with the center of the double helix screen, and at the same time makes the rectangular image surface at the lower end of the projection image light path inscribed on the double helix screen overlooking the circular surface, on the rotating double helix screen Realize the full-screen projection display inside the cylinder. The structure adopted by the present invention is easy to realize; the rotating double helix screen with a certain vibration is separated from the projection device, which increases the stability of imaging; no additional optical devices are needed to change the optical path, which reduces the resulting alignment error, A clear true three-dimensional image can be obtained.
Description
技术领域 technical field
本发明属于立体显示技术领域,涉及真三维立体成像所用的投影系统。The invention belongs to the technical field of stereoscopic display and relates to a projection system used for true three-dimensional stereoscopic imaging.
背景技术 Background technique
利用旋转螺旋曲面作为显示屏产生真三维图像在国外已经得到过实施,德州仪器公司的研究人员对激光扫描旋转螺旋曲面产生真三维图像的技术进行了广泛的研究,在螺旋屏加激光扫描技术的组合三维显示上进行了尝试;德国D.Bahr等则利用三色激光器扫描一个快速旋转的单螺旋曲面显示屏,形成了彩色的真三维图像。这类真三维显示方法都采用了从底部向上投影的一体化投影方式;但这样做使得系统整体结构复杂,加工难度比较高,光学器件定位精度要求比较高,而且如果设计不得当,会减少成像区域;采用从上往下投影的成像系统结构简化了系统的光学系统,充分利用了整个旋转双螺旋屏幕旋转形成的成像圆柱体,并将含有一定震动的旋转双螺旋屏幕和投影装置分离,增加了成像的稳定性;不需要额外的光学器件改变光路,减少了由此带来的对准误差,可以得到清楚的真三维图像。The use of rotating spiral surface as a display screen to generate true three-dimensional images has been implemented abroad. Researchers from Texas Instruments have conducted extensive research on the technology of laser scanning rotating spiral surfaces to generate true three-dimensional images. In the combination of spiral screen and laser scanning technology A combined three-dimensional display was attempted; German D. Bahr et al. used three-color lasers to scan a fast-rotating single-helical curved display to form a color true three-dimensional image. This kind of true three-dimensional display method adopts the integrated projection method of projecting from the bottom up; but this makes the overall structure of the system complex, the processing difficulty is relatively high, and the positioning accuracy of optical devices is relatively high. area; the imaging system structure projected from top to bottom simplifies the optical system of the system, makes full use of the imaging cylinder formed by the rotation of the entire rotating double helix screen, and separates the rotating double helix screen with a certain vibration from the projection device, increasing the Imaging stability is improved; no additional optical devices are needed to change the optical path, reducing the resulting alignment error, and a clear true three-dimensional image can be obtained.
发明内容 Contents of the invention
为了解决现有技术单面屏所生成的图像稳定性不够,以及双面屏支撑结构阻挡视角的问题,本发明的目的是设计一个独特的真三维立体成像投影结构,为此,本发明提供一种稳定可靠,并且基本不遮挡视角,能够在整个旋转双螺旋屏幕旋转形成的成像圆柱体内成真三维立体图像的投影系统。In order to solve the problem of insufficient stability of the image generated by the single-sided screen in the prior art and the problem that the supporting structure of the double-sided screen blocks the viewing angle, the purpose of the present invention is to design a unique true three-dimensional stereoscopic imaging projection structure. Therefore, the present invention provides a A stable and reliable projection system that basically does not block the viewing angle and can form a true three-dimensional stereoscopic image in the imaging cylinder formed by the rotation of the entire rotating double helix screen.
为了达成所述目的,本发明提出一种在旋转双螺旋屏幕上实现圆柱体内全屏投影的双螺旋屏幕全屏投影系统,由投影装置和双螺旋屏幕组成;所述投影装置位于旋转双螺旋屏幕上方,通过调整投影装置的空间位置,使得投影装置和双螺旋屏幕之间的相对位置使得投影装置上的投影镜头投射出的投影图像光路的中心与双螺旋屏幕的中心重合。In order to achieve the stated purpose, the present invention proposes a double-helix screen full-screen projection system that realizes full-screen projection in a cylinder on a rotating double-helix screen, consisting of a projection device and a double-helix screen; the projection device is located above the rotating double-helix screen, By adjusting the spatial position of the projection device, the relative position between the projection device and the double helix screen makes the center of the optical path of the projection image projected by the projection lens on the projection device coincide with the center of the double helix screen.
本发明的有益效果:本发明采用的结构易于实现;并将含有一定震动的旋转双螺旋屏幕和投影装置分离,增加了成像的稳定性;不需要额外的光学器件改变光路,减少了由此带来的对准误差,可以得到清楚的真三维图像。本发明采用从上往下投影的成像方式,该投影方式的结构简化了系统的光学系统,充分利用了整个旋转双螺旋屏幕旋转形成的成像圆柱体,并将含有一定震动的旋转双螺旋屏幕和投影装置分离,增加了成像的稳定性;不需要额外的光学器件改变光路,减少了由此带来的对准误差,可以得到清楚、稳定的真三维图像。Beneficial effects of the present invention: the structure adopted by the present invention is easy to realize; the rotating double helix screen with a certain vibration is separated from the projection device, which increases the stability of imaging; no additional optical devices are needed to change the optical path, reducing the resulting A clear true three-dimensional image can be obtained by reducing the alignment error. The present invention adopts the imaging method of projection from top to bottom. The structure of this projection method simplifies the optical system of the system, fully utilizes the imaging cylinder formed by the rotation of the entire rotating double helix screen, and combines the rotating double helix screen with certain vibrations and The separation of the projection device increases the stability of imaging; no additional optical devices are needed to change the optical path, which reduces the alignment error caused by it, and can obtain a clear and stable true three-dimensional image.
附图说明 Description of drawings
图1a是本发明双螺旋屏幕全屏投影系统;Fig. 1a is a full-screen projection system with a double helix screen of the present invention;
图1b是图1a的俯视图;Figure 1b is a top view of Figure 1a;
图1c是图1a的含光路的俯视图;Figure 1c is a top view of the light path of Figure 1a;
图1d是图1a的含光路的侧视图;Figure 1d is a side view of the light path of Figure 1a;
图2是本发明双螺旋屏幕全屏投影系统中投影仪主体水平放置时的光路侧视图;Fig. 2 is a side view of the optical path when the main body of the projector is placed horizontally in the double-helix screen full-screen projection system of the present invention;
主要部件说明:Description of main components:
投影装置1
投影仪主体11 投影镜头12Projector
角度调整板13 支撑横轴14
支撑纵轴15Support
双螺旋屏幕2Double Helix
主体21 支撑轴22
圆柱体成像区23 俯视圆面24
旋转轴25
投影图像光路3Projected
光路上端长方形图像面31 光路下端长方形图像面32
中心光线33Center Ray 33
具体实施方式 Detailed ways
下面结合附图详细说明本发明技术方案中所涉及的各个细节问题。应指出的是,所描述的实施例仅旨在便于对本发明的理解,而对其不起任何限定作用。Various details involved in the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention, rather than limiting it in any way.
一、双螺旋屏幕全屏投影系统主体1. The main body of the double helix screen full-screen projection system
双螺旋屏幕全屏投影系统的架构,如参考图1a和图1b示出:本发明由投影装置1和双螺旋屏幕2组成;所述投影装置1位于旋转双螺旋屏幕2上方,通过调整投影装置1的空间位置,使得投影装置1和双螺旋屏幕2之间的相对位置使得投影装置1上的投影镜头投射出的投影图像光路的中心与双螺旋屏幕2的中心重合。所述投影装置1包括:投影仪主体11、投影镜头12、角度调整板13、支撑横轴14和支撑纵轴15,投影仪主体11位于角度调整板13上,投影镜头12位于投影仪主体11的左侧,角度调整板13和支撑横轴14相连,支撑横轴14和支撑纵轴15相连,支撑纵轴15立于地面;通过角度调整板13调整投影仪主体11相对于支撑纵轴15的角度和支撑横轴14的长度,使得投影装置1上的投影镜头12投射出的投影图像光路3的中心与双螺旋屏幕2的中心重合。The architecture of the double-helix screen full-screen projection system, as shown with reference to Fig. 1a and Fig. 1b: the present invention is made up of a
所述双螺旋屏幕2包括:主体21、支撑轴22、圆柱体成像区23、俯视圆面24和旋转轴25,双螺旋屏幕2为双螺旋曲面型屏幕,双螺旋曲面型屏幕与支撑轴22中心对称,并且位于投影装置1的下方。主体21由支撑轴22支撑,俯视圆面24关于旋转轴25中心对称,光路下端长方形图像面32内接于双螺旋屏幕俯视圆面24。成像时主体21旋转形成以俯视圆面24为底面、旋转轴25为高的圆柱体成像区23。The
如参考图1c、图1d示出:投影镜头12向双螺旋屏幕2投出一束从侧面看为一个等腰梯形的投影图像光路3,光路上端长方形图像面31与投影镜头12重合,光路下端长方形图像面32为图1d中的正方形cbfg;投影装置1和双螺旋屏幕2之间的相对位置使得投影镜头12投射出的投影图像光路3的中心与双螺旋屏幕2的中心重合,同时使得光路下端长方形图像面32内接于俯视圆面24。As shown with reference to Fig. 1c and Fig. 1d: the
二、投影系统主体的倾斜角度2. The tilt angle of the main body of the projection system
如参考图1d、图2示出:为了使得投影装置1和双螺旋屏幕2之间的相对位置使得投影镜头12投射出的投影图像光路3的中心与双螺旋屏幕2的中心重合的同时,使得光路下端长方形图像面32内接于俯视圆面24,角度调整板13与相对于支撑纵轴15之间角度的确定如下所述:As shown in FIG. 1d and FIG. 2: in order to make the relative position between the
如图2所示,当投影仪主体11水平放置在地面上时投影镜头12离地面的距离为h=6.85cm;当投影仪主体11水平放置在地面上时,投影镜头12投射在正前方垂直摆放的屏幕上的正方形图像下端离地面的距离为H,当整个系统如图1d摆放时,当光路下端长方形图像面32内接于俯视圆面24时,测得H=9.99cm;同时测得投影镜头12到光路下端长方形图像面32的距离L=47.2cm;故可由公式As shown in Figure 2, when the projector
计算得到此时投影图像光路3的仰角:Calculate the elevation angle of
同时,投影图像光路3的中心光线33与水平参考面的夹角β也可由公式求出:At the same time, the angle β between the
故将投影仪主体11倾斜β的角度,即在图1f中,使得:Therefore, the projector
∠eod=β=14.9°,∠eod=β=14.9°,
投影仪主体11的光路偏移角度与角度调整板13平行;将投影仪主体11倾斜一定的角度,同时调整投影装置1和双螺旋屏幕之间的相对距离,使图1d中中心光线33垂直于光路下端长方形图像面32,即可使得光路下端长方形图像面32内接于俯视圆面24的同时,保证投影装置1上的投影镜头12投射出的投影图像光路3的中心与双螺旋屏幕2旋转形成的圆柱体成像区23的中心重合,达到在旋转双螺旋屏幕上实现圆柱体内全屏投影显示的目的。The optical path offset angle of the projector
以上所述,仅为本发明中的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉该技术的人在本发明所揭露的技术范围内,可理解想到的变换或替换,都应涵盖在本发明的包含范围之内,因此,本发明的保护范围应该以权利要求书的保护范围为准。The above is only a specific implementation mode in the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technology can understand the conceivable transformation or replacement within the technical scope disclosed in the present invention. All should be covered within the scope of the present invention, therefore, the protection scope of the present invention should be based on the protection scope of the claims.
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