WO2013013610A1 - Apparatus for imaging object at close range - Google Patents
Apparatus for imaging object at close range Download PDFInfo
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- WO2013013610A1 WO2013013610A1 PCT/CN2012/079064 CN2012079064W WO2013013610A1 WO 2013013610 A1 WO2013013610 A1 WO 2013013610A1 CN 2012079064 W CN2012079064 W CN 2012079064W WO 2013013610 A1 WO2013013610 A1 WO 2013013610A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
Definitions
- the invention belongs to the technical field of optical imaging, and in particular relates to a close-range object imaging device.
- the traditional object imaging device and method are very simple, as shown in Figure 1.
- the image sensor is placed at a distance from the planar object, and the light emitted by the planar object is focused onto the image sensor to form an image of the planar object by the image sensor.
- the conventional planar object imaging device In order to obtain an image with uniform brightness and a true proportion, according to the optical principle, the conventional planar object imaging device must place the image sensor far away from the planar object, thus The application of a conventional planar object imaging device to a flat touch computer can cause the entire device to be too large.
- US Patent No. 7,660,047 B1 discloses a close-range imaging device, as shown in FIG.
- a close-range imaging device As shown, by placing the left end of a transparent wedge plate in front of the lens of the image sensor, a large number of minute facets coated with reflective media are engraved on the right end face of the wedge plate.
- the upper surface of the wedge plate is incident, and after multiple total reflections in the wedge plate, the right end surface is reflected, and then multiple reflections occur in the wedge plate, and then exit from the left end surface and reach the image sensor; thereby realizing the planar object. Close range imaging.
- the close-range imaging device must be designed to ensure that the facet angle on the right end of the wedge plate is consistent with the ideal design value. A slight deviation will result in a certain convergence point of the light on the left end and the ideal convergence point. Distance deviation, which affects the sharpness of the image; in the actual design and production process, a large number of small facets are engraved on a small area such as the right end face of the wedge plate, which is often difficult to achieve in the conventional process, resulting in the
- the proximity imaging device has low reliability and high manufacturing cost.
- the wedge plate is usually made of plexiglass and has a large bulk density, so that the proximity imaging device has a large weight, which limits the The application of short-range imaging devices in many occasions.
- the present invention provides a close-range object imaging device capable of achieving close proximity of a planar object Imaging, high reliability, clear imaging, simple manufacturing, low cost, small size, light weight and wide application.
- a close-range object imaging device comprising:
- a light filtering layer configured to filter out light having an incident angle greater than a filtering angle in the light scattered by the object, and transmitting the light having an incident angle smaller than the filtering angle
- a Fresnel lens for focusing the light having an incident angle smaller than the filtering angle and emitting the focused light
- a wedge-shaped light guide for folding the focused light and emitting the folded focused light
- An image sensor for receiving the folded focused light at a focus and imaging the object according to the folded focused light.
- the wedge-shaped light guide is composed of a transflective layer and a reflective layer at an angle of a wedge angle; the transflective layer is an incident surface, and can transmit part of the light and reflect the rest of the light.
- the focus is the focus of the folded focused light corresponding to all the rays having an incident angle of zero degrees; the vertical light has the highest energy intensity and the imaging effect is optimal.
- the light filter layer and the transflective layer are both an array diaphragm or an optical glass coated with an optical film; the components are light and thin, so that the entire device is small in size, light in weight, and easy to move and place.
- the filtering angle is greater than 0 ° and less than 30 °; avoiding the difference in the number of reflections of the light in the wedge-shaped light guide due to the large incident angle and the small incident angle light, causing the image sensor to be ghosted.
- the wedge angle is greater than 0° and less than 60°; the miniaturization of the device volume is ensured.
- the imaging principle of the invention is that the scattered light emitted by the object is incident on the light filtering layer, and the light filtering layer filters out the light whose incident angle is greater than the filtering angle in the scattered light, and transmits the light whose incident angle is smaller than the filtering angle; the incident angle is smaller than the filtering angle Light is incident on Fresnel lens, Fresnel lens focusing The incident angle is smaller than the filtering angle of the light, and the focused light is emitted; the focused light is incident on the semi-transparent layer of the wedge-shaped light guide, and the semi-transparent layer transmits the focused light to be incident on the reflective layer of the wedge-shaped light guide, and the reflective layer reflects the focused light.
- the transflective layer Injecting it into the transflective layer, the transflective layer reflects the focused light, causing it to be incident on the reflective layer again, thereby repeatedly folding the focused light and exiting the folded focused light; the image sensor receives the folded focused light at the focus, The object is imaged according to the folded focused light.
- the imaging device of the present invention can realize the object close-up by a rational and ingenious structure design without a fine process manufacturing. Imaging, high imaging clarity, and easy to manufacture and assemble the device.
- the imaging device of the present invention adopts optical components that are light and thin, so that the entire device is small in size, light in weight, and easy to move and place.
- the imaging device of the invention collects the vertical light scattered by the object as the imaging light, has uniform brightness, high definition and good imaging effect.
- FIG. 1 is a schematic structural view of a conventional object imaging apparatus.
- FIG. 2 is a schematic structural view of a conventional close-range imaging device for an object.
- FIG. 3 is a schematic structural view of an image forming apparatus applied to a flat touch type computer according to the present invention.
- FIG. 4 is a schematic diagram of the optical path principle of the light filter layer in the present invention.
- Figure 5(a), Figure 5(b), and Figure 5(c) show that the vertical rays enter the focus from the left, middle, and right sides of the Fresnel lens.
- the wedge-shaped light guide reaches the optical path of the image sensor.
- Figure 6 is an equivalent optical path diagram of the focused light propagating in a wedge-shaped light guide.
- the flat touch computer includes a housing 1 and a housing 1
- the top is provided with a transparent plate 2
- the transparent plate 2 is a plexiglass having a scattering medium on its upper surface and two infrared light-emitting diodes 3 on both sides (Infrared LED ); the infrared light emitted by the infrared light-emitting diode 3 enters the transparent plate 2 and is continuously totally reflected between the upper and lower surfaces; since the upper surface of the transparent plate 2 has There is a layer of scattering medium, so that each time the infrared light is emitted, a part of the light will be scattered from the upper surface of the transparent plate 2, so that it is placed on the transparent plate 2
- the objects above (such as fingers, palms) are illuminated;
- a display layer 4 connected to the computer, and below the display layer 4, a scattering layer 5 is provided, and the scattering layer 5
- a scattering layer 5 is provided, and the scattering layer 5
- One end is provided with a light-emitting diode 6;
- the display layer 4 is an interactive layer provided by the user to interact with the computer information, and the light emitted by the light-emitting diode 6 enters the scattering layer 5 and is scattered from the upper surface thereof so as to be placed on the scattering layer. 5
- the upper display layer 4 is illuminated; the user above the transparent tablet 2 can clearly see the information displayed on the display layer 4;
- a light filter layer is provided below the scattering layer 5 It is an array diaphragm whose upper surface is white, the lower surface and the hole wall is black or an optical glass whose upper surface is coated with an optical film; the object above the transparent plate 2 is illuminated to scatter infrared light, and the infrared light passes through the transparent flat 2, display layer 4 and scattering layer 5 are incident on the light filter layer 7, but only infrared rays with an incident angle of less than 15 ° can pass through the light filter layer 7 and the rest of the infrared light The line is reflected or absorbed, as shown in Figure 4; this avoids the phenomenon that the reflection of the light in the wedge-shaped light guide is different from that of the small incident angle due to the large incident angle, resulting in image imaging image ghosting.
- Fresnel lens 8 under the light filter layer 7 , the upper surface of which is a small to large concentric facet; the incident angle is less than 15 ° infrared The light line is incident on the Fresnel lens 8 , and the Fresnel lens 8 focuses the infrared light rays and emits the infrared focused light;
- the wedge-shaped light guide 10 is formed by a transflective layer 11 and 9.23 °
- the angle of the reflective layer 12 is formed, the transflective layer 11 is an optical glass with an upper surface coated with an optical film, and the reflective layer 12 is a plane mirror; as shown in Fig.
- three vertical infrared rays are respectively from the Fresnel lens
- the left, middle, and right sides of the 8 are incident, and after focusing by the Fresnel lens 8, three infrared focused rays are emitted, and the infrared focused light is incident on the semi-transparent layer 11 of the wedge-shaped light guide 10, and the semi-transparent layer 11 Transmission Infrared Focusing light (regardless of a portion of the infrared focused light is reflected) is incident on the reflective layer 12 of the wedge-shaped light guide 10, and the reflective layer 12 reflects infrared
- the light is focused so that it is incident on the transflective layer 11 and the transflective layer 11 reflects the infrared focused light (regardless of a part of the infrared focused light is transmitted), causing it to be incident on the reflective layer again.
- the three infrared focusing rays the light is reflected six times in the wedge light guide 10, and finally, the wedge-shaped light guide 10 emits three
- Figure 6 is an equivalent optical path diagram of the folding and propagation of three infrared focused rays in a wedge-shaped light guide 10, It is drawn according to the symmetry property of the object and the image; that is, the infrared focused light enters the wedge light guide 10 and the optical path continuously reflected between the transflective layer 11 and the reflective layer 12 is equivalent to infrared.
- the focused light enters the optical path within the wedge-shaped light guide stack 20 that is stacked in a forward and reverse sequence by a plurality of wedge-shaped light guides; therefore, the focal length of the Fresnel lens 8 is equivalent to the center of the Fresnel lens 8 from the focus O to the focus J
- the distance (the focal length of the Fresnel lens 8 in the present embodiment is 0.866 times the length of the transflective layer 11);
- the image sensor 9 receives the infrared folded focused light at the focus to form a transparent plate 2 above.
- the image of the object and the image is transferred to a computer for identification.
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Abstract
Description
本发明属于光学成像技术领域，具体涉及一种近距离的物体成像装置。 The invention belongs to the technical field of optical imaging, and in particular relates to a close-range object imaging device.
传统的物体成像的装置和方法都很简单，如图 1 所示，将图像传感器设于离平面物体一定距离处，平面物体发出的光线聚焦至图像传感器上，从而通过图像传感器形成平面物体的图像。但 为了得到亮度均匀、比例真实的图像，根据光学原理， 传统的平面物体成像的装置必须使 图像传感器置于离平面物体较远的地方，因此 传统的平面物体成像装置应用于平面触摸式电脑会造成整个设备过于庞大。 The traditional object imaging device and method are very simple, as shown in Figure 1. As shown, the image sensor is placed at a distance from the planar object, and the light emitted by the planar object is focused onto the image sensor to form an image of the planar object by the image sensor. but In order to obtain an image with uniform brightness and a true proportion, according to the optical principle, the conventional planar object imaging device must place the image sensor far away from the planar object, thus The application of a conventional planar object imaging device to a flat touch computer can cause the entire device to be too large.
授权号为 US 7,660,047 B1 的美国专利公开了一种近距离的成像装置，如图 2 所示，其通过将一块透明的 楔形平板的左端面置于 图像传感器的镜头前， 楔形平板的右端面上刻有大量微小的镀有反射介质的刻面。将 平面物体近距离的设于 楔形平板上， 平面物体发出的光线经菱形镜偏转后从 楔形平板的上表面入射，并在楔形平板内发生多次全反射后到达右端面发生反射，进而在楔形平板内发生多次全反射后从左端面射出并到达图像传感器；从而实现了平面物体的 近距离成像。 US Patent No. 7,660,047 B1 discloses a close-range imaging device, as shown in FIG. As shown, by placing the left end of a transparent wedge plate in front of the lens of the image sensor, a large number of minute facets coated with reflective media are engraved on the right end face of the wedge plate. Set the planar object at a close distance to On a wedge-shaped plate, the light from a planar object is deflected by a diamond mirror The upper surface of the wedge plate is incident, and after multiple total reflections in the wedge plate, the right end surface is reflected, and then multiple reflections occur in the wedge plate, and then exit from the left end surface and reach the image sensor; thereby realizing the planar object. Close range imaging.
但该 近距离的成像装置必须在设计时，保证楔形平板右端面上的刻面角度与设计理想值一致，稍有微小偏差则会导致光线在左端面上的汇聚点与设计理想的汇聚点存在一定的距离偏差，从而影响成像的清晰度；可在实际设计制作过程中，在楔形平板右端面那样小的面积上刻大量微小的刻面，普通工艺往往难以达到该工艺要求，从而导致该 近距离成像装置可靠性较低、制造成本较高。 同时楔形平板通常材质为有机玻璃，体积密度都较大，从而使得该 近距离成像装置重量较大 ，限制了该 近距离成像装置在许多场合领域的应用。 But that The close-range imaging device must be designed to ensure that the facet angle on the right end of the wedge plate is consistent with the ideal design value. A slight deviation will result in a certain convergence point of the light on the left end and the ideal convergence point. Distance deviation, which affects the sharpness of the image; in the actual design and production process, a large number of small facets are engraved on a small area such as the right end face of the wedge plate, which is often difficult to achieve in the conventional process, resulting in the The proximity imaging device has low reliability and high manufacturing cost. At the same time, the wedge plate is usually made of plexiglass and has a large bulk density, so that the proximity imaging device has a large weight, which limits the The application of short-range imaging devices in many occasions.
针对现有技术所存在的上述技术缺陷，本发明提供了一种近距离的物体成像装置，能够实现 平面物体的 近距离 成像， 可靠性高，成像清晰，制造简单，成本低，体积小，质量轻，应用广。 In view of the above technical deficiencies existing in the prior art, the present invention provides a close-range object imaging device capable of achieving close proximity of a planar object Imaging, high reliability, clear imaging, simple manufacturing, low cost, small size, light weight and wide application.
一种近距离的物体成像装置，包括： A close-range object imaging device comprising:
光线过滤层，用于滤除物体散射的光线中入射角大于过滤角度的光线，并透射入射角小于过滤角度的光线； a light filtering layer, configured to filter out light having an incident angle greater than a filtering angle in the light scattered by the object, and transmitting the light having an incident angle smaller than the filtering angle;
菲涅尔透镜，用于聚焦所述的 入射角小于过滤角度的光线，并出射聚焦光线； a Fresnel lens for focusing the light having an incident angle smaller than the filtering angle and emitting the focused light;
楔形光导，用于折叠所述的聚焦光线，并出射折叠聚焦光线； a wedge-shaped light guide for folding the focused light and emitting the folded focused light;
图像传感器，用于在焦点处接收所述的折叠聚焦光线，并根据折叠聚焦光线对物体进行成像。 An image sensor for receiving the folded focused light at a focus and imaging the object according to the folded focused light.
所述的楔形光导由半透半反射层和与之成楔形角度夹角的反射层构成；所述的半透半反射层为入射面，可以透射部分光线，并反射其余部分的光线。 The wedge-shaped light guide is composed of a transflective layer and a reflective layer at an angle of a wedge angle; the transflective layer is an incident surface, and can transmit part of the light and reflect the rest of the light.
优选的技术方案中，所述的焦点处为所有入射角为零度的光线对应的折叠聚焦光线汇聚的焦点；垂直光线的能量强度最大，成像效果最佳。 In a preferred technical solution, the focus is the focus of the folded focused light corresponding to all the rays having an incident angle of zero degrees; the vertical light has the highest energy intensity and the imaging effect is optimal.
优选的技术方案中，所述的光线过滤层和半透半反射层均为阵列光阑或镀有光学薄膜的光学玻璃；元件轻薄，使得整个装置体积小，质量轻，易于移动和摆放。 In a preferred embodiment, the light filter layer and the transflective layer are both an array diaphragm or an optical glass coated with an optical film; the components are light and thin, so that the entire device is small in size, light in weight, and easy to move and place.
优选的技术方案中，所述的过滤角度大于 0 °且小于 30 °；避免了由于大入射角度光线在楔形光导内的反射次数与小入射角度光线不同，造成图像传感器成像的重影现象。 In a preferred technical solution, the filtering angle is greater than 0 ° and less than 30 °; avoiding the difference in the number of reflections of the light in the wedge-shaped light guide due to the large incident angle and the small incident angle light, causing the image sensor to be ghosted.
优选的技术方案中，所述的楔形角度大于 0 °且小于 60 °；保证了装置体积的小型化。 In a preferred embodiment, the wedge angle is greater than 0° and less than 60°; the miniaturization of the device volume is ensured.
本发明的成像原理为：物体发出的散射光线入射至光线过滤层，光线过滤层滤除散射光线中入射角大于过滤角度的光线，并透射入射角小于过滤角度的光线；入射角小于过滤角度的光线入射至 菲涅尔透镜，菲涅尔透镜聚焦 入射角小于过滤角度的光线，并出射聚焦光线；聚焦光线入射至楔形光导的半透半反射层，半透半反射层透射聚焦光线，使之入射至楔形光导的反射层，反射层反射聚焦光线，使之入射至半透半反射层，半透半反射层反射聚焦光线，使之再次入射至反射层，依此反复折叠聚焦光线并出射折叠聚焦光线；图像传感器在焦点处接收折叠聚焦光线，并根据折叠聚焦光线对物体进行成像。 The imaging principle of the invention is that the scattered light emitted by the object is incident on the light filtering layer, and the light filtering layer filters out the light whose incident angle is greater than the filtering angle in the scattered light, and transmits the light whose incident angle is smaller than the filtering angle; the incident angle is smaller than the filtering angle Light is incident on Fresnel lens, Fresnel lens focusing The incident angle is smaller than the filtering angle of the light, and the focused light is emitted; the focused light is incident on the semi-transparent layer of the wedge-shaped light guide, and the semi-transparent layer transmits the focused light to be incident on the reflective layer of the wedge-shaped light guide, and the reflective layer reflects the focused light. Injecting it into the transflective layer, the transflective layer reflects the focused light, causing it to be incident on the reflective layer again, thereby repeatedly folding the focused light and exiting the folded focused light; the image sensor receives the folded focused light at the focus, The object is imaged according to the folded focused light.
本发明的有益技术效果为： The beneficial technical effects of the present invention are:
（ 1 ）本发明成像装置通过合理巧妙的结构设计， 无需精细的工艺制造 即能 实现物体 近距离 成像，成像清晰度高，装置易于制造和装配。 (1) The imaging device of the present invention can realize the object close-up by a rational and ingenious structure design without a fine process manufacturing. Imaging, high imaging clarity, and easy to manufacture and assemble the device.
（ 2 ） 本发明成像装置所采用都为轻薄型的光学元件，使得整个装置体积小，质量轻，易于移动和摆放。 ( 2 ) The imaging device of the present invention adopts optical components that are light and thin, so that the entire device is small in size, light in weight, and easy to move and place.
（ 3 ）本发明成像装置采集物体散射的垂直光线作为成像光线，亮度均匀，清晰度高，成像效果佳。 (3 The imaging device of the invention collects the vertical light scattered by the object as the imaging light, has uniform brightness, high definition and good imaging effect.
图 1 为传统的物体成像装置的结构示意图。 FIG. 1 is a schematic structural view of a conventional object imaging apparatus.
图 2 为现有的物体近距离成像装置的结构示意图。 FIG. 2 is a schematic structural view of a conventional close-range imaging device for an object.
图 3 为本发明成像装置应用于平面触摸式电脑的结构示意图。 FIG. 3 is a schematic structural view of an image forming apparatus applied to a flat touch type computer according to the present invention.
图 4 为本发明中光线过滤层的光路原理示意图。 4 is a schematic diagram of the optical path principle of the light filter layer in the present invention.
图 5(a) 、图 5(b) 、图 5(c) 分别为垂直光线从菲涅尔透镜左边、中间、右边入射聚焦后进入 楔形光导并到达图像传感器的光路图。 Figure 5(a), Figure 5(b), and Figure 5(c) show that the vertical rays enter the focus from the left, middle, and right sides of the Fresnel lens. The wedge-shaped light guide reaches the optical path of the image sensor.
图 6 为聚焦光线在楔形光导中折叠传播的等效光路图。 Figure 6 is an equivalent optical path diagram of the focused light propagating in a wedge-shaped light guide.
为了更为具体地描述本发明，下面结合附图及具体实施方式对本发明的技术方案及其相关成像原理进行详细说明。 In order to describe the present invention more specifically, the technical solutions of the present invention and related imaging principles are described in detail below with reference to the accompanying drawings and specific embodiments.
以本发明的成像装置在平面触摸式电脑中的应用为例，如图 3 所示，平面触摸式电脑包括壳体 1 ，壳体 1
顶部设有透明平板 2 ；透明平板 2 为有机玻璃，其上表面具 有一层散射介质，其两侧分别设有两个红外发光二极管 3 （ Infrared LED
）；红外发光二极管 3 发出的红外光线进入透明平板 2 后在上下表面之间不断地全反射；由于 透明平板 2 上表面具
有一层散射介质，所以红外光线在每次发生全发射的同时有一部分光线会从透明平板 2 上表面 散射出，使得置于透明平板 2
上方的物体（例如手指、手掌）被照亮； Taking the application of the imaging device of the present invention in a flat touch computer as an example, as shown in FIG. 3, the flat touch computer includes a
透明平板 2 下方设有与计算机相连的显示层 4 ，显示层 4 下方设有散射层 5 ，散射层 5
一端设有发光二极管 6 ；显示层 4 为用户与计算机信息交互而设置的交互层，发光二极管 6 发出的光线进入散射层 5 后从其 上表面 散射出，使得置于散射层
5 上方的显示层 4 被照亮；透明平板 2 上方的用户可清晰可见显示层 4 上所显示的信息； Below the
散射层 5 下方设有 光线过滤层 7
，其为上表面是白色、下表面和孔壁是黑色的阵列光阑或为上表面镀有光学薄膜的光学玻璃； 透明平板 2 上方的物体被照亮后会 散射红外光线，红外光线经过 透明平板
2 、显示层 4 和散射层 5 入射至光线过滤层 7 ，但 只有入射角小于 15 °的红外 光 线才可以透过 光线过滤层 7 ，其余的红外 光
线则被反射或被吸收，如图 4 所示；这样可避免由于大入射角度光线在楔形光导内的反射次数与小入射角度光线不同，造成图像传感器成像的重影现象。 A light filter layer is provided below the
光线过滤层 7 下方设有菲涅尔透镜 8 ，其上表面为由小到大的同心圆刻面；入射角小于 15 °的红外
光 线 入射至 菲涅尔透镜 8 ，菲涅尔透镜 8 对这些红外 光 线进行聚焦并出射红外 聚焦光线； There is a Fresnel
菲涅尔透镜 8 下方设有 楔形光导 10 ，楔形光导 10 由半透半反射层 11 和与之成 9.23
° 夹角的反射层 12 构成，半透半反射层 11 为上表面镀有光学薄膜的光学玻璃，反射层 12 为平面镜；如图 5 所示，三条垂直红外光线分别从 菲涅尔透镜
8 的左边、中间、右边入射，经菲涅尔透镜 8 聚焦后出射三条红外 聚焦光线 ，红外 聚焦光线入射至楔形光导 10 的半透半反射层 11 ，半透半反射层 11
透射 红外 聚焦光线（不考虑一部分 红外 聚焦光线被反射），使之入射至楔形光导 10 的反射层 12 ，反射层 12 反射 红外
聚焦光线，使之入射至半透半反射层 11 ，半透半反射层 11 反射 红外 聚焦光线（不考虑一部分 红外 聚焦光线被透射），使之再次入射至反射层 12
，依此三条 红外 聚焦光线在楔形光导 10 中被反射 6 次，并最终由楔形光导 10 出射三条汇聚于焦点的 红外 折叠聚焦光线； Below the Fresnel
图 6 为三条红外聚焦光线在楔形光导 10 中折叠传播的等效光路图，其
根据物和像关于反射面对称的性质绘制而成；即红外 聚焦 光线进入楔形光导 10 内传播并在 半透半反射层 11 和反射层 12 之间不断反射的光路等效于红外
聚焦 光线进入由多个楔形光导按正反顺序叠成的楔形光导栈 20 内的光路；因此菲涅尔透镜 8 的焦距也等效成菲涅尔透镜 8 的中心 O 到 焦点 J
的距离（本实施方式中 菲涅尔透镜 8 的焦距为 半透半反射层 11 长度 的 0.866 倍 ）； Figure 6 is an equivalent optical path diagram of the folding and propagation of three infrared focused rays in a wedge-
最后，图像传感器 9 在焦点处接收红外折叠聚焦光线，形成 透明平板 2 上方的
物体的像，并将图像传送至计算机中进行识别。 Finally, the
应当注意的是，上述实施例中的具体数值只是为作为示例提供的，在本发明的其它实施例中不限于这些数值。可根据不同需求，可能产生各种修改、替换，它们属于所附权利要求或者等同物的范围。 It should be noted that the specific numerical values in the above embodiments are provided only as examples, and are not limited to these numerical values in other embodiments of the present invention. Various modifications and alterations are possible in the scope of the appended claims or equivalents.
Claims (5)
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|---|---|---|---|
| CN201110213049.1 | 2011-07-28 | ||
| CN 201110213049 CN102253444B (en) | 2011-07-28 | 2011-07-28 | Close object imaging apparatus |
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| WO2013013610A1 true WO2013013610A1 (en) | 2013-01-31 |
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| PCT/CN2012/079064 Ceased WO2013013610A1 (en) | 2011-07-28 | 2012-07-23 | Apparatus for imaging object at close range |
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| WO (1) | WO2013013610A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014127074A1 (en) * | 2013-02-18 | 2014-08-21 | Microsoft Corporation | Systems and methods for wedge-based imaging using flat surfaces |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253444B (en) * | 2011-07-28 | 2012-12-05 | 杭州彩燕科技有限公司 | Close object imaging apparatus |
| CN105786267B (en) * | 2016-02-19 | 2019-04-02 | 京东方科技集团股份有限公司 | Photosensitive reflecting mirror, laser induced touch device and laser touch control detecting method |
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| US20020008854A1 (en) * | 2000-03-20 | 2002-01-24 | Leigh Travis Adrian Robert | Waveguide display |
| CN1797170A (en) * | 2004-12-28 | 2006-07-05 | 佳能株式会社 | Illumination apparatus and image-taking apparatus |
| CN101523278A (en) * | 2006-10-12 | 2009-09-02 | 微软公司 | Interactive displays using planar radiation guides |
| CN102144178A (en) * | 2008-09-03 | 2011-08-03 | 微软公司 | Flat panel lens |
| CN102253444A (en) * | 2011-07-28 | 2011-11-23 | 杭州彩燕科技有限公司 | Close object imaging apparatus |
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| US20020008854A1 (en) * | 2000-03-20 | 2002-01-24 | Leigh Travis Adrian Robert | Waveguide display |
| CN1797170A (en) * | 2004-12-28 | 2006-07-05 | 佳能株式会社 | Illumination apparatus and image-taking apparatus |
| CN101523278A (en) * | 2006-10-12 | 2009-09-02 | 微软公司 | Interactive displays using planar radiation guides |
| CN102144178A (en) * | 2008-09-03 | 2011-08-03 | 微软公司 | Flat panel lens |
| CN102253444A (en) * | 2011-07-28 | 2011-11-23 | 杭州彩燕科技有限公司 | Close object imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014127074A1 (en) * | 2013-02-18 | 2014-08-21 | Microsoft Corporation | Systems and methods for wedge-based imaging using flat surfaces |
| US9377902B2 (en) | 2013-02-18 | 2016-06-28 | Microsoft Technology Licensing, Llc | Systems and methods for wedge-based imaging using flat surfaces |
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| Publication number | Publication date |
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| CN102253444B (en) | 2012-12-05 |
| CN102253444A (en) | 2011-11-23 |
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