WO2007068189A1 - Dispositif d'imagerie optique pour souris optique - Google Patents

Dispositif d'imagerie optique pour souris optique Download PDF

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Publication number
WO2007068189A1
WO2007068189A1 PCT/CN2006/003332 CN2006003332W WO2007068189A1 WO 2007068189 A1 WO2007068189 A1 WO 2007068189A1 CN 2006003332 W CN2006003332 W CN 2006003332W WO 2007068189 A1 WO2007068189 A1 WO 2007068189A1
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WIPO (PCT)
Prior art keywords
lens
optical
image
effective depth
light
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PCT/CN2006/003332
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English (en)
Chinese (zh)
Inventor
Shilin Deng
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Shilin Deng
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Publication of WO2007068189A1 publication Critical patent/WO2007068189A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06F3/0317—Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03543—Mice or pucks

Definitions

  • the present invention is an optical imaging device for an optical mouse, and more particularly to a multi-lens optical path optical imaging device suitable for a pen-shaped optical mouse. It belongs to the transformation technology of optical imaging devices used in optical mice.
  • the pointing device includes a cylinder 102, an illumination source 104, a lens 110, an optical movement sensor 108, a switch 106, communication links 116 and 118, and buttons 112 and 114.
  • the illuminating light source 104 emits light, and the lens 110 images the light reflected from the working surface on the optical movement sensor 108.
  • the optical movement sensor 108 captures an image of the work surface imaged by the lens 110
  • the direction of motion and the amount of motion of the pointing device can be obtained from changes in the image.
  • the optical imaging device of the patent has a large disadvantage in drawing or writing.
  • the working surface is on the image sensor due to the effective depth of field limitation of the conventional mouse optical imaging system.
  • the imaging is poorly blurred, which affects the capture of the image by the sensor. Referring to Fig.
  • Step Ml Write the pen at a specific point, then write "/,,; 2.
  • Step M 2 Lift the pen, then in the air a clockwise arc; three steps
  • Step M3 Write a pen at a specific point, write " ⁇ ", and then lift the pen. Throughout the writing process, both the pen and the pen require the pen mouse to maintain precise positioning. Usually, the distance separating from the working surface in the lifting action varies depending on the usage habits of different people, generally less than 12 mm.
  • a pen-shaped mouse device the telecentric optical system or the variable-focus lens group is used to increase the effective depth of field of the optical imaging lens system.
  • Chinese Patent Application No. 01802379. 7 discloses a pen-shaped optical mouse device and a control method thereof. " (Public Date: January 1, 2003), its schematic diagram is shown in Figure 2. It has made some useful improvements, including the telecentric optical imaging system shown in Figure 3.
  • main body 11, illumination unit, 12, light guide, 13, imaging system, 13a, convex lens, 13b, mirror, 14, image sensor, 15, control device, 16, transmission device, 17, setting button , 18, moving wheel switch, 19, contact sensing equipment, 20, working surface.
  • the object distance of the lens is relatively long, which increases the effective depth of field of the lens system, and the pen mouse can form a clear image when it is in contact with the working surface or moves within a certain distance.
  • the distance of the pen mouse from the working surface is different when moving in the air, which requires a large effective depth of field (about 6 to 12 mm) to meet the practical application.
  • the imaging system of the existing single lens optical path single focal length convex lens is shown in FIG. 5, in the figure, 1. image sensor, 2. processing control unit, 3. imaging lens, 4. working surface.
  • the schematic diagram of its imaging situation is shown in Figure 11, and the working surface can be clearly imaged within its effective depth of field range h.
  • the point on the working surface (the point is a black point on a white background on the working surface, see Fig. 15) is a clear image formed on the image sensor S as shown in Fig. 16, and its multiple phases
  • the adjacent dots form a clear image on the light sensing surface S of the image sensor as shown in FIG.
  • the work surface is made of a.
  • the point on the working surface forms a blurred image on the light sensing surface S' of the image sensor.
  • a plurality of adjacent points are formed on the light sensing surface S of the image sensor.
  • the blurred image is shown in Fig. 19, and it is difficult for the image sensor to capture the motion state of the image.
  • the object of the present invention is to provide a method capable of being installed in a small volume of a pen-shaped mouse and providing a large effective depth of field for the above problem, so that the image sensor can correctly capture the movement of the image when the pen-shaped mouse is smoothly written or drawn.
  • Optical imaging device for optical mouse with direction and distance.
  • FIG. 6 A schematic structural view of the present invention is shown in FIG. 6 and includes two or more lens optical paths (A), and the light reflected by the working surface (4) passes through the corresponding different lens optical paths (A) in the image sensor (1). Images are formed on the light sensing surface and superimposed.
  • Each of the lens optical paths (A) corresponds to a different unique effective depth of field segment, and the unique effective depth of field segments of the different lens paths continue in the optical axis direction to form an effective effective depth of field which is substantially longer than the effective depth of field of the single lens optical path;
  • the above two or more overlapping images have at least one optical path in the overall effective depth of field to form a clear image, which is formed with other optical paths or blurred or clear images in the image sensor (1)
  • the lens light path (A) corresponding to the effective depth of field segment can form a clear image on the light sensing surface of the image sensor (1); each lens light path) forms an image independently of each other, and each image thereof is in the image sensor' ( 1)
  • the light-sensing surface is superimposed to form an overlapping image for the processing control unit (2) for comparison processing and positioning.
  • the lens optical path (A) is a focusing lens optical path including a convex lens (3); each lens optical path is a focusing lens optical path composed of one or more convex lenses and/or concave lenses, prisms, and mirrors;
  • each lens optical path is a focusing lens optical path composed of one or more convex lenses and/or concave lenses, prisms, and mirrors;
  • the convex lenses (3) of the above-mentioned respective lens optical paths have different focal lengths; the optical axes of the respective convex lenses (3) may coincide or separate; and each convex lens (3) is on the same optical plane. .
  • the convex lens includes a spherical convex lens and an aspherical convex lens
  • the concave lens includes a spherical concave surface Mirror and aspherical concave lenses, the mirrors comprising a common mirror and a mirror prism.
  • the light path including two or more parallel lens optical paths since the light path including two or more parallel lens optical paths is used, the light reflected by the working surface forms an image on the light sensing surface of the image sensor through the corresponding different optical paths and is superimposed, and each lens light path corresponds to each other.
  • the unique effective depth of field segment enables the unique effective depth of field segments of the different lens paths to continue in the direction of the optical axis to form an overall effective depth of field, thereby making the overall effective depth of field significantly longer than the effective depth of field of a single lens path.
  • the optical imaging device of the present invention is used, when the pen-shaped mouse is in contact with the working surface, that is, the working surface is located in the overall effective depth of field, and a portion of the lens group has a unique effective depth of field, and at this time, the light reflected from the working surface
  • the lens light path corresponding to the unique effective depth of field segment can form a clear image on the light sensing surface of the image sensor, and the light reflected by the working surface passes through the image formed by the other lens light path on the light sensing surface or Clear or fuzzy. Clear and blurred images overlap on the light-sensitive surface to form a special overlapping image.
  • the image sensor and its processing control unit continuously capture and compare the displacement of the image in a short period of time, and the moving state of the image can be obtained.
  • the same principle when the pen mouse is at a certain distance from the working surface, the pen movement is performed, and the working surface is located in a corresponding effective depth of field segment corresponding to the set effective effective depth of field. At this time, the working surface reflects The light path of the lens corresponding to the unique effective depth of field segment forms a clearer image on the light-sensing surface, and the light reflected by the working surface passes through the path of the other lens to form a clear or blurred image on the light-sensing surface. Clear and blurred images overlap on the light-sensitive surface to form a special overlay image.
  • the moving state of the image can be obtained, thereby obtaining the moving state of the mouse.
  • the working surface is within the effective effective depth of field in the direction of the optical axis, there is always a unique effective depth of field segment corresponding to the position of the working surface in the overall effective depth of field, and the light reflected by the working surface passes through A corresponding lens path of an effective depth of field can always form a clear shadow on the light sensing surface.
  • the image reflected by the working surface passes through other lens paths to form an image on the light-sensing surface that is either clear or blurred.
  • the invention is ingeniously designed, and is an optical imaging device for a pen-shaped optical mouse which is effective and convenient to use.
  • Figure 1 is a schematic view showing the structure of a "computer-like pointing device similar to a pen" of U.S. Patent No. 6,051,015;
  • Figure 2 is a schematic view showing the structure of a pen-shaped mouse named "Pen-shaped optical mouse device and its control method" in Chinese Patent Application No. 01802379.
  • Figure 3 is a schematic diagram of a telecentric optical system named "Pen-shaped optical mouse device and its control method" in Chinese Patent Application No. 01802379.
  • Figure 4 is a diagram showing the steps of writing the letter "X"
  • Figure 5 is a schematic view showing the imaging of a single lens optical path single focal length imaging device
  • Embodiment 6 is a schematic view of Embodiment 1 of the present invention, in which three optical axes of different focal lengths coincide, and three convex lenses are arranged concentrically on the same optical plane, and the effective depth of field of the lens paths of three different focal lengths is The optical axes continue each other;
  • FIG. 7 is a schematic view of Embodiment 1 of the present invention, wherein the focusing convex lens is independently imaged by two lenses, and the image is superimposed on the light sensing surface by a mirror or a reflecting prism, and the optical axes of the respective convex lenses are separated;
  • FIG. 8 is the present invention.
  • Figure 9 is a schematic view of Embodiment 4 of the present invention, wherein three convex lenses are superimposed from top to bottom, and the optical axes of the respective convex lenses are coincident, and the effective depth of field of the three lens paths continues on the optical axis;
  • Figure 10 is A schematic diagram of Embodiment 5 of the present invention, which uses a single-sided convex lens, and three different focal lengths of convex lenses have the same optical axis and are layered from top to bottom and arranged concentrically around the optical axis;
  • Fig. 11 is a schematic diagram showing the imaging situation of the working faces of the single focal length optical imaging device at different positions.
  • the working surface can only be changed within a small effective depth of field, a clearer image can be obtained on the light sensing surface;
  • Figure 12 is the same optical axis of the three convex lenses of different focal lengths in the multi-lens optical path optical imaging device
  • the working surface is within the overall effective depth of field, and the light reflected by the working surface is imaged by the lens optical path of different focal lengths on the light sensing surface of the image sensor.
  • the light reflected by the working surface can form a clear image on the light-sensing surface of the image sensor only through the lens light path corresponding to the working surface, and the image formed by the other lens light path is blurred;
  • Figure 13 is a view showing that the optical axes of the two convex lenses of different focal lengths in the multi-lens optical path optical imaging apparatus are the same and on the same optical plane.
  • the working surface is located at different distances from the lens on the optical axis, that is, when the object distance is different, the light reflected by the working surface is clearly imaged by the lens optical path of different focal lengths corresponding to the lens on the light sensing surface. There are significant differences in image size;
  • FIG. 14 is a multi-lens optical path optical imaging device in which the position of two different focal length imaging convex lenses is adjusted according to the ratio of the object distance/image distance, and when the working surface is located at different distances from the lens on the optical axis, the light reflected by the working surface passes through
  • the schematic diagram of the corresponding lens optical path with different focal lengths on the light-sensing surface is clearly imaged, and the adjusted image size is not different;
  • Figure 15 is a black dot on a white background on the work surface
  • Figure 16 is a clear image of a black spot on a white background on a work surface formed on a light-sensing surface through a lens path;
  • Figure 17 is a blurred image of a black spot on a white background on a work surface formed on a light-sensing surface through a lens optical path;
  • Figure 18 is an image of a black spot on a white background on a work surface formed by a plurality of lens paths of different effective depths of view on the light-sensing surface, and an image formed by overlapping a clear image and some blurred images;
  • Figure 19 is a blurred image of four adjacent black spots on a white background on a work surface formed on a light-sensitive surface through a lens optical path;
  • Figure 20 is a view showing four adjacent black spots on a white background on a working surface through a plurality of lens paths of different effective depths of field forming an image on the light sensing surface, wherein the clear image of the four points and the blurred image are overlapped.
  • Figure 21 is a clear image of four adjacent black spots on a white background on the working surface formed by a lens on the light sensing surface;
  • Figure 22 is a partial example of the optical axis of each lens of the multi-lens optical path optical imaging device. a top view of the mirror group;
  • Figure 23 is a plan view showing the arrangement of the improved lens optical path.
  • one of the convex lenses in the five lens optical paths is circular in the middle, and the other four are located around the circumference, forming an annular shape;
  • Figure 25 is a view showing that the optical axes of the two convex lenses of different focal lengths in the multi-lens optical path optical imaging apparatus are the same and on the same optical plane.
  • the working surface is located at the effective depth of field intersection of the two lens paths. When the working surface moves in a direction perpendicular to the optical axis, the light reflected by the working surface is formed by the different lens optical paths on the light sensing surface of the image sensor.
  • 26 is a view showing that the optical axes of the two convex lenses of different focal lengths are the same in the multi-lens optical path optical imaging device, and the distance between each lens and the light-sensing surface of the image sensor is adjusted, and the focus between the lens group and the light-sensing surface is coincident on the optical axis.
  • the working surface is located at the effective depth of field intersection of the two lens optical paths. When the working surface moves in a direction perpendicular to the optical axis, the light reflected by the working surface is formed on the light sensing surface of the image sensor by different lens optical paths with similar sharpness.
  • Figure 27 is a schematic view of Embodiment 6 of the present invention.
  • Figure 6 is a schematic illustration of one embodiment of a multi-lens optical path optical imaging device. It uses three lens optical paths, the convex lenses (3) of the respective lens optical paths have different focal lengths and the optical axes coincide, and the three convex lenses (3) are arranged concentrically in the same optical plane from short to long from the inside to the outside. , as shown in Figure 23.
  • the effective depth of field segments corresponding to the lens paths of different focal lengths are mutually extended from the top to the bottom on the optical axis to form a long overall effective depth of field.
  • H 2 H 3 is the effective depth of field corresponding to the lens paths of three different focal lengths from the inside to the outside in the lens group, and the three effective depth of field segments of H 2 and H 3 are mutually extended, so that the overall effective depth of field is more effective than the single effective depth of field.
  • the depth of field segment is significantly extended.
  • the three effective depth of field segments of ⁇ , H 2 . H 3 partially overlap each other.
  • the lens path refers to light passing through one or a group of identical lenses. The general term for the route, each lens path has a different focal length and effective depth of field segment.
  • the effective depth of field means that in the optical lens imaging device, in the direction of the optical axis, the light reflected by the object or pattern located thereon can form a desired clear image through the position of the optical path of the lens on the optical axis.
  • the unique effective depth of field segment of each lens optical path means that light reflected by the working surface located within the effective depth of field segment can be formed on the light sensing surface of the image sensor through the corresponding lens optical path.
  • the working surface (4) when the working surface (4) is located within the effective depth of field within the overall effective depth of field, the working surface (4) is located at a. At the time, the light reflected by the working surface (4) forms a clear image on the light sensing surface of the image sensor (1) through the lens optical path corresponding to the effective depth of field segment, and corresponds to the effective depth of field segments h 2 and h 3 . The image formed by the lens path is blurred.
  • the effective depth h inside face section (4) When the effective depth h inside face section (4) is located generally effective depth of field of 3, i.e.
  • Figure 12 is a multi-lens optical path optical imaging device in which the optical axes of the three convex lenses of different focal lengths are the same and on the same optical plane, the working surface is within the overall effective depth of field, and the light reflected by the working surface passes through the lens optical path of different focal lengths in the image sensor.
  • the working surface is located on the effective depth of field segment 11 2 within the effective effective depth of field, the focal point of the lens optical path corresponding to the effective depth of field segment h 2 is e 2 , and the light reflected by the point a on the working surface passes through the lens with the focus of ei an optical path between the light sensitive surface of the image sensor focus e t capable of forming a clear image, for the image formed on the light-sensing surface S blur on the image sensor.
  • the image formed at this time is as shown in FIG. 17 , which is a circular or annular image formed on the light-sensing surface S by a black dot on the white background of the working surface ( FIG. 15 ) (specifically, the convex lens is passed through).
  • the shapes are different and different. For the convenience of drawing and illustration, the figure is illustrated in a circular pattern. And the light reflected by the point a on the working surface passes through the lens optical path with the focus of 6 2 to form a clear on the light sensing surface.
  • the image is b 2 .
  • the image formed by it is shown in Fig. 16, which is a clear image formed on the light sensing surface S by a black dot on the working surface on a white background (Fig. 15).
  • a point light reflected from the working surface through the focal point of the optical path 6 b 3 lens 3 can form a clear image on the right side of the light sensing surface S, the image formed on the light sensing surface S blur.
  • the image formed by it is shown in Fig.
  • FIG. 17 which is a circular or circular image formed on the photosensitive surface S by a black dot on the white background of the working surface (Fig. 15).
  • the light reflected by a black dot a on a white background of the working surface is superimposed on the light sensing surface S by three different focal length lens paths of the focal points ei , e 2 , ⁇ to form a superimposed image of the special beads.
  • Figure 20 is a special overlay image of the four black dots on the white background of the working surface formed by the multi-focus multi-effective effective depth of field lens imaging device on the light sensing surface S of the image sensor, in which four clear 'points are shown
  • the effective depth of field sections of the three lens optical paths, H 2 , H 3 continue on the optical axis, and the working surface is reflected when the working surface is within the effective effective depth of field thereof.
  • the light formed by the lens path of different focal lengths on the light-sensing surface has at least one clear image overlapped with other or blurred or clear images.
  • the multi-lens optical optical imaging device of Figure 6 can provide a much larger effective depth of field in a similar volume than conventional single-lens optical path optical devices (Fig. 5).
  • the multi-lens optical path optical imaging apparatus uses two or more lens optical path imaging, and its imaging overlaps on the light sensing surface of the image sensor, it has the following four related problems, and the following four existing embodiments 1 exist. The problem and its solution are briefly analyzed separately.
  • the image formed by the multi-lens optical path optical imaging device on the image sensor is a special image with at least one clear image and other overlapping or blurred images, as shown in Fig. 20.
  • the single-lens optical path optical imaging device has only one clear image when it is clearly imaged, as shown in Figure 21. Therefore, the contrast of the image formed by the multi-lens optical path imaging device with respect to the image formed by the single-lens optical path imaging device is reduced, making the imaging process of the multi-lens optical path optical imaging device more difficult, and in order to solve this problem, Use the following three methods: ⁇ to improve:
  • Method 1 Improve the sensitivity of the optical motion sensor to image contrast and use an image processing algorithm that is suitable for it to better handle low-contrast images.
  • Method 2 Improve the graphic features of the working surface (such as using a dedicated mouse pad) and improve the illumination of the working surface, so that the light reflected by the working surface forms a clearer image on the light-sensing surface of the image sensor.
  • Method 3 Install a distance measuring device (not shown) on the pen mouse or use a switch or pressure sensor placed on the pen tip to dynamically detect the distance between the working surface and the lens, so that it cannot be clear on the light sensing surface.
  • the optical path of the imaged lens is blocked by an optical switch (such as a liquid crystal optical switch, etc.), and only the optical path of the lens that can be clearly imaged on the light-sensing surface is opened, thereby reducing the blurring of the imaged light.
  • This method can significantly improve the quality of the image, but it will increase the design difficulty and production cost.
  • the size a of the image remains unchanged, the object distance/larger, the smaller the image size b on the light-sensing surface, the larger the object distance and the smaller the imaging.
  • the same distance is moved horizontally along the work surface, the amount of movement detected by the pen mouse is different. To reduce this difference, the following methods can be used to improve:
  • Method 2 Use a pressure sensor or switch (not shown) on the head of the pen mouse to detect the contact between the mouse and the working surface.
  • the working surface is on the image sensor according to the contact and separation between the mouse and the working surface.
  • the difference in imaging size, combined with the user's usage habits (including statistical data and the user's personalized input data), is adjusted by appropriate algorithms to reduce the difference in mouse positioning.
  • This method can also be used in conjunction with method one to reduce the adjustment amplitude of the position of a pair of lenses in the method to control the positioning difference within the permissible range.
  • Method 3 When the lens imaging device with a larger object distance is used to move the same distance longitudinally along the optical axis direction, the ratio of the moving object distance to the original object distance is reduced, thereby forming the working surface on the light sensing surface. The change in image size is reduced. Applying this method will reduce the light efficiency of the lens and increase the volume occupied by the lens group and the optical path.
  • Method 4 By setting a distance measuring device (not shown) on the mouse, it is used to measure the distance between the pen mouse and the working surface, and calculate the difference in imaging size according to the ratio of the object distance/image distance, and adopt an appropriate algorithm. Make adjustments. This method can be used to accurately calibrate the difference in its positioning, but its design difficulty and production cost will be significantly improved.
  • the light reflected by the working surface can form the clearest image on the light sensing surface of the image sensor through the optical path of the lens, and the image formed by the light of other different lens paths on the light sensing surface is blurred and blurred.
  • the image and the clear image have a large difference in the speed of movement, but the blurred image has little effect on the capture of the moving information of the image processing unit of the mouse to extract the clear image.
  • the optical planes of the two convex lenses are the same as the optical axis, i.e., I.
  • ⁇ is in the same plane, when the working surface is at the depth of field plane where the point at is located, the light reflected by the working surface can form a clear image on the light sensing surface S of the image sensor through the lens Io (corresponding to the focus is e.) When the working surface is at the depth of field where the point & 2 is located, the light reflected by the working surface can pass through the lens ⁇ (the corresponding focus is to form a clear image on the light sensing surface S- of the image sensor, when the working surface is along the lens light When the axial direction a 2 moves, the working surface reflects Light passes through the lens I.
  • the image formed on the light-sensing surface s of the image sensor is blurred by a clear gradation, and the image formed on the light-sensing surface S of the image sensor through the lens L is sharply blurred by blur.
  • Point a The working surface is located in the lens I. The point on the work surface when the boundary with the effective depth of field of I is at this point, point a. The reflected light passes through the lens I, respectively. And an image b formed on the light sensing surface S of the image sensor.
  • the sharpness is similar to 1 ⁇ (indicated by a circle in the figure, the sharpness is represented by the diameter of the circle, and the smaller the diameter, the higher the definition).
  • the object lens When the object lens, the image distance is fixed, and the focal lengths of different focal lengths are on the same plane, the light reflected by the working surface passes through
  • the imaging moving speed of the different lens optical paths on the light sensing surface of the image sensor is inversely proportional to the focal length of the lens.
  • the lens and the optical path of each lens are adjusted.
  • the distance between the light-sensing surface is such that the focal point between the lens and the light-sensing surface coincides with each other on the optical axis, so that the working surface is located at the depth of field plane where the effective depth of field intersection point a a of the two lens optical paths is located, the working surface is at the image sensor
  • the point on the work surface is a when the image clarity on the light-sensing surface is similar.
  • Adjusting the position of the convex lens in the optical axis direction by the above method is the same as the adjustment direction of the first method for solving the problem 2.
  • the amount of displacement may be different, which is required in practical applications. Make the right balance.
  • the lens is arranged in such a way as to reduce the diameter of the convex lens on the optical path of each lens.
  • 23 and FIG. 24 are top views of the modified lens group in which the lens of each lens optical path is spatially arranged in the cross section of the optical path.
  • one of the convex lenses of the five lens optical paths is in the middle of the circle, and the other four are located around the circumference, and are surrounded by an annular shape.
  • the four lenses divide a circle into four equal parts, each occupying a quarter circle.
  • the focusing convex lens is independently imaged by the double lens, and the optical axes of the convex lenses of different focal lengths are separated.
  • the mirror or the reflective prism is used to superimpose the image on the light-sensing surface.
  • Fig. 8 is another embodiment in which the method of the first problem of the second embodiment and the method of the third problem of the first embodiment are adjusted.
  • the optical axes of the three convex lenses are the same, and the optical paths of the lenses are independent, and the focal lengths are different.
  • the convex lenses of different focal lengths are arranged from top to bottom according to the focal length from long to short. Looking down from the optical axis, looking directly at the lens group, the lenses are arranged concentrically, and the top view of the lens is shown in Fig. 22.
  • Fig. 9 is another embodiment in which the method of the first problem of the second embodiment and the method of the third of the first embodiment are adjusted. Its three convex lenses have the same optical axis and are superimposed on each other from small to large.
  • the light reflected from the working surface passes through the outer peripheral portion of the lowermost large convex lens, passes through the edges of the upper two convex lenses, and is imaged on the light sensing surface, and the focal length of the lens optical path is the longest.
  • the other part of the light reflected by the working surface is condensed by the area between the middle portion and the outer peripheral portion of the lowermost large convex lens, and then converges through the outer peripheral portion of the intermediate convex lens, and passes over the edge of the upper small convex lens.
  • the focal length of this lens path is slightly shorter.
  • the other part of the light reflected by the working surface is concentrated by the central portion of the lowermost large convex lens, and then converges through the central portion of the intermediate convex lens, and passes through the small convex lens at the upper portion to image on the light sensing surface.
  • the focal length of the lens path is the shortest.
  • 1Q is another embodiment in which the method 1 of the second problem of the first embodiment and the method of the third problem of the first embodiment are adjusted.
  • the embodiment in the figure uses a single-sided convex lens and three convex lenses of different focal lengths.
  • the optical axes are the same and are layered from top to bottom and arranged concentrically around the optical axis.
  • Figure 27 is a schematic view of the structure of the embodiment, which is divided into five convex lenses of different focal lengths according to the method of the fourth problem according to the method of the fourth embodiment, and according to the method 1 and the problem 3 in the second problem.
  • One of the convex lenses of the five lens optical paths is circular in the upper part of the center of the optical axis, and the other four are viewed from the top to the bottom of the convex lens located at the center as shown in FIG. 23, and are surrounded by an annular shape; In the direction of the optical axis, each convex lens is adjusted from short to long from top to bottom in accordance with the length of the focal length.
  • each convex lens By redistributing the spatial distribution of each convex lens in the cross section of the optical path, the diameter of each convex lens is reduced while maintaining the area of each convex lens in the cross section of the optical path, and the effective depth of field of each lens optical path is increased, thereby increasing the overall Effective depth of field;
  • the position of the convex lens on the optical path of each focusing lens in the direction of the optical axis, and moving the working surface within the overall effective depth of field the difference in imaging speed of the working surface through the optical path of each lens on the photosensitive surface Significantly reduced, and the image quality after image overlap is controlled within the permissible range, forming an image that can be processed and compared by the processing control unit.
  • the above-described embodiment mainly uses a spherical convex lens as an illustration, but in the multi-lens optical optical imaging device of the present invention, in order to adjust the focal length and imaging quality, etc., in the lens group Concave lenses or various types of prisms and aspherical convex mirrors are also often used, but this does not detract from the spirit of the invention and does not affect the innovative features of the invention.
  • the lens group is often corrected by various types of mirrors, prisms and other aspherical side mirrors, and will not be described here. .
  • the multi-lens optical path lens imaging apparatus for a mouse has an effect of providing a much larger effective depth of field than a single-focus imaging lens in a narrow space of a mouse (particularly a pen-shaped mouse), and can secure it
  • the image quality enables the image sensor to correctly capture the moving distance and direction of the image formed by it, so that the mouse can be accurately positioned when the pen is pen or pen, so that the movement state of the mouse on the working surface can be correctly recognized.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Image Input (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne un dispositif d'imagerie optique pour souris optique, qui comprend deux ou plusieurs traversées optiques de la lentille (A). Les faisceaux réfléchis par une surface de travail (4) forment les images et se superposent à une surface photosensible d'un capteur d'image (1) à travers différentes traversées optiques de la lentille (A) correspondantes. Chacune desdites traversées de la lentille (A) correspond à une section respective de profondeur de mise au point spéciale effective, différente; les sections de profondeur de mise au point spéciale effective des différentes traversées optiques de la lentille s'étendent mutuellement sur l'axe optique et forment la profondeur de mise au point visiblement étendue en tant qu'entité, au-dessus de la profondeur de mise au point effective d'une seule traversée optique de la lentille, desdites deux ou plusieurs images superposées à l'intérieur de la plage de profondeur de mise au point effective, en tant qu'entité globale; au moins une traversée optique forme une image relativement nette; l'image se superpose à une image nette ou floue formée par les autres traversées optiques sur la surface photosensible du capteur d'image (1).
PCT/CN2006/003332 2005-12-13 2006-12-08 Dispositif d'imagerie optique pour souris optique WO2007068189A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200510130952 CN1983140A (zh) 2005-12-13 2005-12-13 笔形光鼠标的多透镜光路光学成像装置
CN200510130952.6 2005-12-13

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WO2007068189A1 true WO2007068189A1 (fr) 2007-06-21

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CN112004011A (zh) * 2020-08-27 2020-11-27 北京三快在线科技有限公司 一种图像采集的方法、装置及光路转变元件

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CN103297653A (zh) * 2012-02-23 2013-09-11 菱光科技股份有限公司 接触式影像感测装置
CN106093497A (zh) * 2016-07-28 2016-11-09 国网山东省电力公司惠民县供电公司 一种折射抄表装置
CN107238395A (zh) * 2017-08-01 2017-10-10 珠海市微半导体有限公司 移动机器人的光流里程传感系统及其景深调整方法
CN109557662A (zh) * 2018-12-12 2019-04-02 无锡和晶科技股份有限公司 一种远距离导光以及光斑的方向和大小可控的显示方法
CN111698348B (zh) * 2019-03-11 2021-11-09 京东方科技集团股份有限公司 成像装置和电子设备

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KR100384539B1 (ko) * 2000-09-29 2003-05-22 주식회사 애트랩 광마우스용 센서
US20050093825A1 (en) * 2003-10-29 2005-05-05 Unity Opto Technology Co., Ltd. Lens structure of optic mouse

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KR100384539B1 (ko) * 2000-09-29 2003-05-22 주식회사 애트랩 광마우스용 센서
US20050093825A1 (en) * 2003-10-29 2005-05-05 Unity Opto Technology Co., Ltd. Lens structure of optic mouse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112004011A (zh) * 2020-08-27 2020-11-27 北京三快在线科技有限公司 一种图像采集的方法、装置及光路转变元件
CN112004011B (zh) * 2020-08-27 2022-02-01 北京三快在线科技有限公司 一种图像采集的方法、装置及光路转变元件

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