CN2904009Y - Half-ball optical lens for plane positioning - Google Patents
Half-ball optical lens for plane positioning Download PDFInfo
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- CN2904009Y CN2904009Y CNU2006200585035U CN200620058503U CN2904009Y CN 2904009 Y CN2904009 Y CN 2904009Y CN U2006200585035 U CNU2006200585035 U CN U2006200585035U CN 200620058503 U CN200620058503 U CN 200620058503U CN 2904009 Y CN2904009 Y CN 2904009Y
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Abstract
The utility model provides a semi-spherical optical lens used for planar positioning, which comprises a semi-spherical lens, an aperture diaphragm, a lens cone, a optical fiber field-curve calibration board, a line array optoelectronic device; the semi-spherical lens and the optical fiber field-curve calibration board are respectively installed on the both ends of the lens cone coaxially, the aperture diaphragm is arranged on the spherical center plane of the semi-spherical lens, and the center of the aperture diaphragm coincides the center of the semi-spherical lens spherical surface; the outer side of the optical fiber field-curve calibration board is stuck with the line array optoelectronic element, the pixel optical fibers in the optical field-curve calibration board are arranged in parallel; the pixel optical fiber section size is in correspondence with the photosensitive unit of line array optoelectronic element, the line array optoelectronic element is connected with computer or instrument signal. The utility model has advantages of simple structure, fast and reliable positioning, and low cost.
Description
Technical field
The utility model relates to the plane positioning technology of electric whiteboard system, specifically is meant the dome-type optical lens that is used for plane positioning.
Background technology
Electric whiteboard system is used widely in fields such as education, office, meetings, this system mainly partly is made up of lettering pen/wiping, screen, optical projection system and the computing machine etc. of special use, wherein, the plane positioning technology of determining and following the tracks of lettering pen/wiping is one of core technology the most, be to satisfy lettering pen to write with computer recording, when showing, satisfy the basic assurance that system time resolution and spatial resolution require, can make that to write demonstration more synchronous, smooth; Present existing location technology principle has following several: touch/induction mode, wireless location mode, scan mode and several class methods of imaging locator meams.
Touch resistance-type and the electromagnetism/condenser type of being divided into, when finger or the lettering pen of particular design press screen constantly, the electrical quantity of relevant position (resistance or inductance etc.) changes, and determines that by the coding addressing circuit back realizes coordinate setting or write track record; The kind of wireless location has light veil type and localization by ultrasonic: the display screen edge design that the light veil type positioning instant is corresponding in twos has two groups of luminotrons and photoelectric receiving tube array, when writing when blocking light path, can judge the coordinate position of shading this moment; Based on infrared and wireless location mode (Yonald Chery ultrasonic locating, " Stylus for Use with Transcription System " (USA), Patent suppl.Num.6111565) structure is less relatively, lettering pen/smear to design to have and to send infrared light and hyperacoustic electronic circuit simultaneously, during work, infrared signal arrives the time of the receiving trap be positioned at screen two corners and can ignore, can be used as the time reference of ultrasound emission, by measuring time and the delay that ultrasound wave arrives at two sensors, can obtain the coordinate position of lettering pen; The laser scanning method is respectively to place a laser scan unit at the two ends, base of screen, each unit laser beam is through the tilting mirror deflection of high speed rotating, on plane, scan near writing screen, when arriving lettering pen, beam flying produces scattering or reflection, received by photodetector, and send computing machine with signal, computing machine is according to the clock signal characteristics, can calculate the angle coordinate of lettering pen with respect to two sweep center points, because the distance between the center of two scanners is known, can realize the location according to principle of triangulation; About the optical imagery localization method, a kind of " photoelectric positioning apparatus and the calibration steps thereof that are used for interactive electronic writing display system " disclosed in the Chinese invention patent application CN200410077389.6, the photodetector of this technology is positioned at the place ahead or the rear of writing screen, to the hot spot direct imaging that lettering pen sends, follow the tracks of by position and the enforcement of determining lettering pen after the Flame Image Process.
Above-mentioned existing location technology has their own characteristics each but its technical limitation is all arranged: touches class technology and light curtain technical requirement clipboard and is the special use screen, and the integrated degree height, but when screen was big, it was higher to be difficult for realization and cost; The bearing accuracy height of laser scanning methods, time response is good, but relates to dynamic component, and life-span and maintenance in the big cost height of volume, the practical application are that problem to be overcome is arranged; Based on the method compact conformation of infrared/ultrasonic measurement principle, cost is lower, but when screen is big, must increase the emissive power of lettering pen, and the lettering pen size is restricted, and bearing accuracy is also relatively low in addition; The above-mentioned imaging localization method of mentioning is simple in structure, throw or the bigger system of rear-projection space depth before mainly being applicable to, but the tracking time characteristic is subjected to the restriction of two dimensional image processing speed, be not suitable for the panel display screen that does not have or have only very little vertical space depth yet, this external system installation requirement height, image digitization compensation deals are also relatively more difficult.
Because it is different with the applied environment of imaging/projection lens with optical lens to be used for the electronic whiteboard plane positioning, determined the difference of principle of design: for imaging/projection optical system, emphasize high resolving power and uniform illuminance of image plane, and the requirement axle is gone up and the high conformity of off-axis image matter, the former emphasizes that then the imaging facula energy distribution is about chief ray symmetry (and to relatively low with the coherence request of the outer spot size of axle on the axle) on the image planes, so that accurately determine the center of hot spot, the function of the image planes curvature of field and distortion must be simple clear and definite simultaneously, is convenient to the compensation deals of successive image.
The optical system that is used for the electronic whiteboard location requires field angle to reach 90 °, adopts the multi-disc lens arrangement, though can realize in modern designs and the manufacturing, but the analytic expression complexity of pattern distortion aberration, the digital compensation difficulty, the manufacturing price height is unfavorable for commercial applications simultaneously; Use the promptly complete concentric spherical lens system of global lens can realize big visual field: as far back as nineteen forty-four, Baker has designed a kind of globe lens that is used for underwater photography, the full visual field of these lens can reach 120 °, relative aperture 1: 3.5, image planes are spherical curve, and illuminance of image plane is directly proportional with the visual field cosine of an angle.In addition, 2005 Japanese CANON KK (KANO) a kind of ball-type lens arrangement (application number JP2005338341-A that is used for digital vedio recording/projection is disclosed, NEGISHI M, " Wide angle lens apparatus for camera; has image surface converterhaving optical fibres having longitudinal direction corresponding tocenter of ball lens "), wherein system has used the image transmission optical fibre awl that has concave surface to proofread and correct the image planes curvature of field, it is better that the outer and axle of axle is gone up the consistance of point, but on this lens arrangement and the cost and be not suitable for plane positioning: the one, the making of optical fiber curvature of field correction plate was difficult to realize (even realized when field angle of image was excessive, the array photoelectric device of back is difficult to match), the 2nd, the camera lens installation and processing of this full symmetrical configuration still is very difficult, and cost is also too high simultaneously.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art part, provide a kind of simple in structure, easy for installation, cost is low, applied widely, the object space visual angle is big, the location is used for the dome-type optical lens of plane positioning reliably.
The purpose of this utility model is achieved through the following technical solutions: the dome-type optical lens that originally is used for plane positioning, comprise packaged lens, aperture diaphragm, lens barrel, optical fiber curvature of field correction plate, the linear array photoelectric device, packaged lens, the coaxial respectively two ends that are installed in lens barrel of optical fiber curvature of field correction plate, described aperture diaphragm is positioned on the centre of sphere plane of packaged lens, and the aperture diaphragm center overlaps with the sphere centre of sphere of packaged lens, the optical fiber curvature of field correction plate outside is bonding with the linear array photoelectric device, pixel optical fiber in the optical fiber curvature of field correction plate is and is arranged in parallel, pixel optical fiber sectional dimension is corresponding with the photosensitive unit in the linear array photoelectric device, and described linear array photoelectric device is connected with computing machine or instrument signal.
For realizing the utility model better, the sphere outside of described packaged lens is equipped with a plurality of spherical lenses concentric with the packaged lens sphere.These a plurality of concentric spherical lenses can carry out spherical aberration correction and astigmatic compensation, and the astigmatism that the plane of packaged lens produces is behind adequate compensation, and its axle infrared optical fiber cross section with optical fiber curvature of field correction plate is complementary, and guarantees the upward unanimity of extra-axial imagery resolution of axle.The effect of introducing packaged lens is a camera lens true field when determining, compression reduces optical fiber correction plate size as square visual field (comparable traditional globe lens is little more than 50%), is convenient to array device coupling thereafter, reduces manufacture difficulty and cost simultaneously.
The refractive index of described packaged lens is 1.46～1.6; The refractive index of described spherical lens is 1.5～1.8; The interval of each spherical lens is determined by optical design according to the pixel fiber size; The material of spherical lens is optical glass or optical plastic.
The receiving plane of described optical fiber curvature of field correction plate is a sphere, and its sphere centre of sphere overlaps with the sphere centre of sphere of packaged lens.
For reducing the influence of bias light, described packaged lens is equipped with optical filter, and optical filter can be installed in sphere one side or plane one side, also can use the material lens with filter action to replace the optical filter function.
The utility model compared with prior art has following advantage and beneficial effect:
1, the utility model is compared with existing complete globe lens, and under the same field angle of image condition, field angle of object of the present utility model is n times (n is the refractive index of packaged lens) of complete globe lens;
2, parameters such as the radius-of-curvature of the utility model by suitably selecting each concentric spherical of packaged lens, refractive index, sphere interval, can carry out spherical aberration correction or astigmatic compensation, the outer spot size of axle is complementary with corresponding fibre optic plate fiber size, and reliability of positioning is good;
3, optical fibre plate one end that uses of the utility model is made into common curved surface (as sphere) and is used to proofread and correct the curvature of field, the other end is that plane and photoelectric array device connect airtight, owing to used parallel biography as optical fibre plate, and simple for structure, the penalty function form is simple, applicability is installed improves;
4, the utility model has been realized super wide-angle optics visual field, single camera lens can accurately be determined the angular coordinate of target fast in 90 ° field range, being applicable to that big flat-faced screen (electronic whiteboard) or plane are write follows the tracks of and the location, simple in structure, compare with the laser scanning method, good economy performance, easy for installation, combine with computing machine, can be used for the giant-screen written record; When being used for position application, have the photoelectric tracking response soon, realize characteristics easily;
When 5, the utility model was used for plane positioning, the device fabrication cost was relatively low.
Description of drawings
Fig. 1 is used for the structural representation of the dome-type optical lens of plane positioning for the utility model.
The dome-type optical lens that Fig. 2 is used for plane positioning for the utility model is used for the structural representation of electronic whiteboard plane positioning.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment one
As Fig. 1, shown in 2, originally the dome-type optical lens that is used for plane positioning, comprise aperture diaphragm 1, packaged lens 2, spherical lens 3, lens barrel 4, optical fiber curvature of field correction plate 5, linear array photoelectric device 6, packaged lens 2, the optical fiber curvature of field correction plate 5 coaxial respectively two ends that are installed in lens barrel 4, aperture diaphragm 1 is positioned on the centre of sphere plane of packaged lens 2, and aperture diaphragm 1 center overlaps with the sphere centre of sphere of packaged lens 2, the sphere outside design of packaged lens 2 has and has aberration correction effect and the spherical lens 3 concentric with packaged lens 2 spheres, the receiving plane of optical fiber curvature of field correction plate is a sphere, its sphere centre of sphere overlaps with the sphere centre of sphere of packaged lens, optical fiber curvature of field correction plate 5 outsides and linear array photoelectric device 6 are bonding, pixel optical fiber in the optical fiber curvature of field correction plate 5 is and is arranged in parallel, pixel optical fiber sectional dimension is corresponding with the photosensitive unit in the linear array photoelectric device 6, and linear array photoelectric device 6 is connected with computing machine 8 or instrument signal.
The refractive index of packaged lens 2 is 1.46～1.6; The refractive index of spherical lens 3 is 1.5～1.8; The interval of each spherical lens 3 is determined by optical design according to the pixel fiber size; The material of spherical lens 3 is optical glass or optical plastic.
For reducing the influence of bias light, packaged lens 2 is equipped with optical filter 7, and optical filter 7 can be installed in sphere one side or plane one side, also can use the material lens with filter action to replace the optical filter function.
As shown in Figure 2, two dome-type optical lens 10,11 and lettering pen luminous sign 12, electronic processing circuit 13, computing machine 8, writing screens 9 that are used for plane positioning can constitute a plane positioning system.Originally the principle of work that is used for the dome-type optical lens of plane positioning is:
(1) two dome-type optical lens that is used for plane positioning separates two adjacent angular that are installed in writing screen 9, and its installed surface and primary optical axis are in same plane, and the linear array photoelectric device 6 of dome-type optical lens is connected with computing machine 8 or instrument signal;
(2) thing light is that the ray cast sent of lettering pen is on the aperture diaphragm 1 of dome-type optical lens, through packaged lens 2, spherical lens 3 refractions, and by each spherical radius of concentric spherical lens, at interval carry out spherical aberration correction, astigmatic compensation after, receive by optical fiber curvature of field correction plate receiving plane, imaging facula does not have reaching on the photoelectric array device of diffusion, computing machine 8 or instrument are determined the position angle of thing light chief ray according to the position of imaging facula on photoelectric device 6 that electronic processing circuit 13 transmits;
(3) computing machine 8 or instrument respectively with respect to the position angle of two camera lenses, determine that by calculating lettering pen luminous sign 12 is the locus of luminous point according to luminous point, realize the location and the tracking of lettering pen.
Detailed process is: from the ray cast of lettering pen on aperture diaphragm 1, aperture diaphragm 1 center with thereafter respectively to reflect sphere homocentric, the refractive index of packaged lens 2 is different with the refractive index of the spherical lens of back 3, the choose reasonable refractive index, spherical aberration correction can be carried out in each spherical radius and interval, the receiving plane of optical fiber curvature of field correction plate 5 also is made into sphere, the centre of sphere of this sphere overlaps with the centre of sphere of packaged lens 2, optical fiber in the optical fiber curvature of field correction plate 5 is and is arranged in parallel, sectional dimension is corresponding with the photosensitive unit of back photoelectric array device 6, consider that an infrared optical fiber cross section is elliptical shape because of processing, the small astigmatism that during design because plane produces, make also oval in shape of the outer hot spot of axle, guarantee on the axle, the consistance of axle outside fix precision.
During work, optical fiber curvature of field correction plate 5 does not have reaching on the photoelectric array device 6 of diffusion with the imaging facula of packaged lens 2, computing machine 8 or instrument are determined the position angle of thing light chief ray, promptly according to the position of imaging facula on photoelectric device 6 that electronic processing circuit 13 transmits
sinα＝n
1·h/R
F (1)
Wherein, n
1Be the refractive index of packaged lens 2, h is an imaging dot center height, R
FBe optical fiber curvature of field correction plate compensation spherical radius, the summit overlaps with the focal plane of lens is approximate.
As shown in Figure 2, the primary optical axis of dome-type optical lens 10,11 and the base of writing screen 9 are at 45, and luminous sign 12 is with respect to the azimuthal angle beta of two dome-type optical lens 10,11 at this moment
1, β
2, can determine by following formula
sinβ
1＝sin(π/4+α
1) (2)
sinβ
2＝sin(π/4+α
2) (3)
Wherein, α
1, α
2Can calculate sign definition by (1) formula: thing photoimaging hot spot below primary optical axis for just, otherwise for bearing.
If aperture diaphragm 1 center with left side dome-type optical lens 10 is that initial point is set up plane coordinate system, calculate luminous sign (lettering pen) planimetric coordinates (x, y) and write down the lettering pen track.
x＝l
0·sinβ
2·cosβ
1/sin(β
1+β
2) (4)
y＝l
0·sinβ
2·sinβ
1/sin(β
1+β
2) (5)
Lettering pen generally is the active illuminating mode; When lettering pen is passive when luminous, need increase the lighting source of one or more lettering pens on the screen base of writing screen 9, lighting source can be a light emitting diode, laser diode etc., write the tip of the brushstyle of a writing or painting and scribble high performance reflecting coating, or has a high performance reflective structure (as miniature reflective cone array structure), two halves ball-type optical lens 10,11 receive from behind the light of writing tip of the brushstyle of a writing or painting reflection, by measuring the position of imaging facula on photoelectric array device 6, can determine corresponding position angle respectively, and determine the coordinate position of lettering pen by the aforementioned calculation process.
As mentioned above, just can realize the utility model preferably.
Claims (7)
1, the dome-type optical lens that is used for plane positioning, it is characterized in that: comprise packaged lens, aperture diaphragm, lens barrel, optical fiber curvature of field correction plate, the linear array photoelectric device, packaged lens, the coaxial respectively two ends that are installed in lens barrel of optical fiber curvature of field correction plate, described aperture diaphragm is positioned on the centre of sphere plane of packaged lens, and the aperture diaphragm center overlaps with the sphere centre of sphere of packaged lens, the optical fiber curvature of field correction plate outside is bonding with the linear array photoelectric device, pixel optical fiber in the optical fiber curvature of field correction plate is and is arranged in parallel, pixel optical fiber sectional dimension is corresponding with the photosensitive unit in the linear array photoelectric device, and described linear array photoelectric device is connected with computing machine or instrument signal.
2, by the described dome-type optical lens that is used for plane positioning of claim 1, it is characterized in that: the sphere outside of described packaged lens is equipped with a plurality of spherical lenses concentric with the packaged lens sphere.
3, by the described dome-type optical lens that is used for plane positioning of claim 1, it is characterized in that: the refractive index of described packaged lens is 1.46～1.6.
4, by claim 2 or the 3 described dome-type optical lens that are used for plane positioning, it is characterized in that: the refractive index of described spherical lens is 1.5～1.8; The interval of each spherical lens is determined according to the pixel fiber size; The material of spherical lens is optical glass or optical plastic.
5, by the described dome-type optical lens that is used for plane positioning of claim 1, it is characterized in that: the receiving plane of described optical fiber curvature of field correction plate is a sphere, and its sphere centre of sphere overlaps with the sphere centre of sphere of packaged lens.
6, by the described dome-type optical lens that is used for plane positioning of claim 1, it is characterized in that: described packaged lens is equipped with optical filter, and optical filter is installed in sphere one side or plane one side.
7, by the described dome-type optical lens that is used for plane positioning of claim 1, it is characterized in that: the manufacturing materials of described packaged lens is a filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200585035U CN2904009Y (en) | 2006-04-30 | 2006-04-30 | Half-ball optical lens for plane positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200585035U CN2904009Y (en) | 2006-04-30 | 2006-04-30 | Half-ball optical lens for plane positioning |
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| Publication Number | Publication Date |
|---|---|
| CN2904009Y true CN2904009Y (en) | 2007-05-23 |
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| CNU2006200585035U Expired - Fee Related CN2904009Y (en) | 2006-04-30 | 2006-04-30 | Half-ball optical lens for plane positioning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114023473A (en) * | 2021-11-03 | 2022-02-08 | 哈尔滨工程大学 | Measuring device based on meniscus compensation method |
| CN115616700A (en) * | 2022-12-09 | 2023-01-17 | 北京灵犀微光科技有限公司 | Auxiliary display structure and optical device |
-
2006
- 2006-04-30 CN CNU2006200585035U patent/CN2904009Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114023473A (en) * | 2021-11-03 | 2022-02-08 | 哈尔滨工程大学 | Measuring device based on meniscus compensation method |
| CN115616700A (en) * | 2022-12-09 | 2023-01-17 | 北京灵犀微光科技有限公司 | Auxiliary display structure and optical device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070523 Termination date: 20100430 |