CN111505837A - Sight distance detection automatic zooming optical system based on binocular imaging analysis - Google Patents

Sight distance detection automatic zooming optical system based on binocular imaging analysis Download PDF

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Publication number
CN111505837A
CN111505837A CN201911418969.XA CN201911418969A CN111505837A CN 111505837 A CN111505837 A CN 111505837A CN 201911418969 A CN201911418969 A CN 201911418969A CN 111505837 A CN111505837 A CN 111505837A
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China
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camera
lens
optical system
imaging analysis
binocular imaging
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CN201911418969.XA
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Chinese (zh)
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侯昌伦
任驿泽
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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Priority to CN201911418969.XA priority Critical patent/CN111505837A/en
Publication of CN111505837A publication Critical patent/CN111505837A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)

Abstract

The invention discloses an automatic zoom optical system for visual range detection based on binocular imaging analysis, which comprises a spectacle frame, wherein an Alvarez zoom system is arranged on the spectacle frame, a plurality of cameras are arranged on the spectacle frame, and each camera comprises a camera P arranged on the outer side of the spectacle frameILAnd a camera PIRAnd a camera Po mounted inside the lens holderLAnd a camera PoR. This system has adopted two kinds of modes to calculate the stadia, makes data can obtain correcting, has improved measuring result's accuracy nature, adjusts the lens focal power according to the stadia data that record and changes, adapts to the demand of people's eye in real time, has improved the comfort level, and entire system places on the mirror holder, and the structure is comparatively simple, and shared space is less, conveniently dresses, does not influence daily work life.

Description

Sight distance detection automatic zooming optical system based on binocular imaging analysis
Technical Field
The invention relates to the field of optical imaging, in particular to a visual range detection automatic zooming optical system based on binocular imaging analysis.
Background
Data show that the number of presbyopic patients is increased rapidly along with the increasing aging phenomenon of population, and the selection of wearing the vision correction glasses is the selection of a plurality of presbyopic patients. However, the conventional vision correction glasses usually have only a single focus or two focuses, and since the focal power of the glasses cannot be completely matched with the eyes of a human, when a far target is watched and a near target is switched, the glasses need to be taken off for seeing clearly, and the use is very inconvenient. There is also a progressive multifocal lens which, although solving the problem of blurred vision, is apt to cause discomfort and a feeling of vertigo to the wearer when used due to design defects. In view of the above situation, some variable focus glasses are available in the market, but manual adjustment or laser distance measurement adjustment is required, which causes problems of inconvenient adjustment and inaccurate optical focal length of the lens, and therefore, an automatic zoom optical system is required to solve the problems. Meanwhile, the automatic zooming optical system has the function of visual range detection, and the optical focal length of the lens is adjusted according to the visual range of human eyes, so that the effects of relieving eye fatigue and preventing myopia are achieved.
Chinese patent document CN108873337A discloses a "vision zoom helmet with manually and hydraulically adjustable vision field". Including helmet body, helmet body is provided with picture frame and lens, the lens is provided with first lens subassembly and second lens subassembly, first lens subassembly is provided with the vision adjusting device that different users can set up different vision degree scopes according to self vision, second lens subassembly is provided with the visual field adjusting device that the user can be according to setting up different fields of vision distance under different environment, vision adjusting device and visual field adjusting device adopt manual hydraulic pressure to adjust the structure, manual hydraulic pressure is adjusted structure and picture frame and/or helmet body coupling to be connected with the lens, the lens is provided with and holds manual chamber, it adjusts structural connection with hydraulic pressure to hold the chamber. Above-mentioned technical scheme adopts manual regulation lens light focus, and manual focusing produces when not only wearing and rocks and influence and wear the effect, and is difficult to accurate focusing.
Disclosure of Invention
The invention mainly solves the technical problems that the original lens optical focal length is inconvenient and inaccurate to adjust, and provides a visual distance detection automatic zooming optical system based on binocular imaging analysis.
The technical problem of the invention is mainly solved by the following technical scheme: the invention comprises a lens bracket, wherein an Alvarez zoom system is arranged on the lens bracket, and a plurality of cameras are arranged on the lens bracket. The camera is used for collecting data such as required angles and distances, the data are transmitted to the Alvarez zooming system, zooming is carried out through calculation and analysis, and the focal length suitable for a user is automatically adjusted.
Preferably, the Alvarez zoom system is mounted at the lens mount of the frame. The zoom system is composed of two lenses, and the zoom function is realized by reversely moving the two lenses perpendicular to the optical axis direction. Each lens comprises a flat surface and a free-form surface, and the free-form surface in the second lens is obtained by rotating the free-form surface in the first lens by 180 degrees. When the two lenses are completely aligned, the whole function is equivalent to that of a parallel glass plate; when the convex surfaces of the two lenses are opposite, the whole function is equivalent to that of a convex lens and the light beams are converged; when the concave parts of the two lenses are opposite, the whole function is equivalent to that of a concave lens, and light beams are diverged.
Preferably, the camera comprises a camera P arranged on the outer side of the lens frameILAnd a camera PIRAnd a camera Po mounted inside the lens holderLAnd a camera PoR. The four cameras are arranged at different positions of the lens bracket, and can accurately measure data such as required angles and distances, and the accuracy of automatic focusing is guaranteed.
Preferably, the camera PILInstall in the picture frame upper left corner, the camera lens is towards the eyeball, camera PIRInstall in the picture frame upper right corner, the camera lens is towards the eyeball, camera PoLInstall at mirror holder left edge, the camera lens is towards the outside, camera PoRThe lens is arranged at the right edge of the mirror bracket, and the lens faces to the outside. Towards eyeball camera PILAnd a camera PIRThe method comprises the steps of shooting an eye image, obtaining dual-purpose pupil centers C L and CR through image processing, connecting the geometric center point of an eyeball with the pupil center point by combining calibrated binocular eyeball geometric centers O L and OR, correcting an Alpha angle to construct a triangle, and enabling an intersection point S of two visual axes to be a watched target.
Preferably, the camera headPoLAnd a camera PoRIs the same as the height of the eyeball. And angle data are accurately acquired according to the positions of eyeballs, so that the accuracy of an automatic focusing result is ensured.
Preferably, the end of the upper glasses leg of the glasses frame is provided with an auxiliary glasses leg, and the auxiliary glasses leg is vertically connected with the glasses leg. The auxiliary glasses legs are used for helping the glasses frame to be fixed, so that the positions between the glasses frame and eyeballs of a user are kept unchanged, and the accuracy of an automatic focusing result is ensured.
Preferably, the auxiliary temples are hollow, and the high-density fillers are arranged inside the auxiliary temples. The high-density filler is filled in the auxiliary glasses legs and used for increasing the quality of the auxiliary glasses legs, and the relative position and the angle between the Alvarez zoom system and the eyeballs of the user are adjusted through the lever principle, so that the purpose of accurately acquiring data is achieved, and the accuracy of an automatic focusing result is ensured.
Preferably, the surface of the auxiliary glasses leg is covered with rubber, and the surface of the rubber is provided with patterns. The rubber and the patterns on the surface of the rubber are used for increasing the surface friction force of the auxiliary glasses legs and helping to fix the glasses frame.
The invention has the beneficial effects that: the vision distance is calculated in two modes, so that data can be corrected, the accuracy of a measuring result is improved, the focal power of the lens is adjusted according to measured vision distance data, the requirement of human eyes is met in real time, the comfort level is improved, the whole system is placed on the spectacle frame, the structure is simple, the occupied space is small, the spectacle frame is convenient to wear, and daily work and life are not influenced.
Drawings
Fig. 1 is a top view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is an effect diagram of the present invention for determining the viewing distance by triangulation.
Fig. 4 is a schematic diagram of binocular stereoscopic vision of the present invention.
FIG. 5 is a schematic diagram of the present invention for verifying a target distance h using depth information h'.
In the figure, 1 eyeball, 2 spectacle frame and 3.1 camera PIL3.2 Camera PIR4.1 Camera shootingHead PoL4.2 Camera PoRAn Alvarez zoom system.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): an automatic zoom optical system for detecting a visual range based on binocular imaging analysis according to the present embodiment is, as shown in fig. 1 and fig. 2, provided with a frame 2, an Alvarez zoom system 5 is provided on the frame 2, and the Alvarez zoom system 5 is installed at a lens installation position of the frame 2. The zoom system is composed of two lenses, and the zoom function is realized by reversely moving the two lenses perpendicular to the optical axis direction. Each lens comprises a flat surface and a free-form surface, and the free-form surface in the second lens is obtained by rotating the free-form surface in the first lens by 180 degrees. When the two lenses are completely aligned, the whole function is equivalent to that of a parallel glass plate; when the convex surfaces of the two lenses are opposite, the whole function is equivalent to that of a convex lens and the light beams are converged; when the concave parts of the two lenses are opposite, the whole function is equivalent to that of a concave lens, and light beams are diverged.
A plurality of cameras are arranged on the spectacle frame 2 and comprise cameras P arranged on the outer side of the spectacle frame 2IL3.1, Camera PIR3.2 and a camera Po mounted inside the frame 2L4.1, Camera PoR4.2. Wherein, the camera PIL3.1 is arranged at the upper left corner of the spectacle frame, and the lens faces towards the eyeball 1; camera PIR3.2 is arranged at the upper right corner of the spectacle frame, and the lens faces towards the eyeball 1. Towards eyeball camera PILAnd a camera PIRShooting an eye image, obtaining dual-purpose pupil centers C L and CR through image processing, connecting the eyeball geometric center with the pupil center by combining calibrated binocular eyeball geometric centers O L and OR, correcting Alpha angles to construct a triangle, and taking the intersection point S of two visual axes as a watched target PIL、PIRThe shooting angle can be adjusted, the image of the eyes of a person can be completely shot, and the image can be conveniently processed in the later stage. The angle is adjusted in advance according to different wearers before formal use. Camera PoL4.1, the lens is arranged at the left edge of the lens frame 2 and faces outwards; camera headPoR4.2 install at mirror holder 2 right side edge, the camera lens is towards the outside, simultaneously, camera PoL4.1 and Camera PoR4.2 corresponds to the height of the eyeball. POL、PORAnd selecting a wide-angle non-distortion lens similar to the field angle of human eyes to simulate the three-dimensional imaging of the human eyes. The camera is used for collecting data such as required angles and distances, the data are transmitted to the Alvarez zooming system, zooming is carried out through calculation and analysis, and the focal length suitable for a user is automatically adjusted.
The end of the glasses leg on the glasses frame 2 is provided with an auxiliary glasses leg 5, the auxiliary glasses leg 5 is vertically connected with the glasses leg, and the auxiliary glasses leg is used for assisting the glasses frame to be fixed, so that the position between the glasses frame and the eyeball of a user is kept unchanged, and the accuracy of an automatic focusing result is ensured. The auxiliary glasses legs 5 are hollow, high-density fillers are arranged inside the auxiliary glasses legs 5 and used for increasing the quality of the auxiliary glasses legs, and the relative positions and angles of the Alvarez zoom system and eyeballs of a user are adjusted through the lever principle, so that the purpose of accurately acquiring data is achieved, and the accuracy of an automatic focusing result is ensured. The surface of the auxiliary glasses leg 5 is covered with rubber, the surface of the rubber is provided with patterns, and the patterns on the surfaces of the rubber and the rubber are used for increasing the surface friction force of the auxiliary glasses leg and helping to fix the glasses frame.
When in use, the spectacle frame is worn according to the requirement, and after the adjustment is finished, two cameras P facing to eyesILAnd a camera PIRThe eye image is taken, and the dual-purpose pupil center C is obtained through image processingLAnd CRCombined with calibrated geometric center O of binocular eyeballLAnd ORThe geometric center point of the eyeball and the pupil center point are connected, a triangle is constructed after the Alpha angle is corrected, and the intersection point S of the two visual axes is the target to be watched, as shown in fig. 3. Then, geometric knowledge is used for carrying out correlation calculation to obtain the height h on the bottom edge and the included angle theta of the visual axisL、θRAnd line of sight LL、LR. Camera POLAnd a camera PORAcquiring images under different field angles from two different points respectively, and calculating the offset between pixels according to the matching relation of the pixels between the images by the triangulation principle to acquire the three-dimensional image of the objectInformation, which is obtained by obtaining depth information of the object using the parallax, calculates an actual distance between the object and the camera, a three-dimensional size of the object, and an actual distance between two points, as shown in fig. 4. After an image with depth information is obtained by using a binocular stereo vision technology, the position of a gazing target on the image is determined by combining the obtained deflection angles of visual axes of two eyes, and the actual distance from the gazing target to the optical center of a camera is obtained. Comparing the two groups of obtained sight distance data after correcting errors, if the difference is larger, indicating that the measurement is wrong, and carrying out re-measurement; if the data are similar, the average of the two is taken as the final viewing distance, as shown in FIG. 5. And after the final visual distance data is obtained, inputting the visual distance signal into an Alvarez lens zoom system, and correspondingly adjusting the focal power of the lens according to the visual distance.
When observing distant targets, the binocular visual axes are close to parallel without intersection points, and the relative deflection angle of the binocular visual axes after a certain distance is extremely small, so that the detection is difficult, and only the short-distance visual distance detection is discussed.

Claims (8)

1. The automatic zooming optical system for the sight distance detection based on binocular imaging analysis comprises a lens bracket (2) and is characterized in that an Alvarez zooming system (5) is arranged on the lens bracket (2), and a plurality of cameras are arranged on the lens bracket (2).
2. The binocular imaging analysis based automatic vision distance detection zoom optical system according to claim 1, wherein the Alvarez zoom system (5) is mounted at a lens mount of the frame (2).
3. The binocular imaging analysis based vision distance detection automatic zoom optical system according to claim 1, wherein the camera comprises a camera P installed outside the frame (2)IL(3.1) Camera PIR(3.2) and a camera Po arranged on the inner side of the spectacle frame (2)L(4.1) Camera PoR(4.2)。
4. The method of claim 3The automatic zooming optical system for the visual range detection based on the binocular imaging analysis is characterized in that the camera PIL(3.1) is arranged at the upper left corner of the spectacle frame, the lens faces towards the eyeball (1), and the camera PIR(3.2) is arranged at the upper right corner of the spectacle frame, the lens faces towards the eyeball (1), and the camera PoL(4.1) is arranged at the left edge of the lens frame (2), the lens faces to the outside, and the camera PoRAnd (4.2) the lens is arranged at the right edge of the lens frame (2) and faces outwards.
5. The binocular imaging analysis based vision distance detection automatic zooming optical system according to claim 3 or 4, wherein the camera PoL(4.1) and Camera PoRAnd (4.2) the height of the eyeball is consistent with that of the eyeball.
6. The automatic zooming optical system for detecting the visual range based on the binocular imaging analysis of the claim 1 is characterized in that the end of the side of the glasses frame (2) is provided with an auxiliary side (5), and the auxiliary side (5) is vertically connected with the side of the glasses.
7. The binocular imaging analysis based vision distance detection automatic zooming optical system according to claim 6, wherein the auxiliary temple (5) is hollow, and the inside of the auxiliary temple (5) is provided with a high-density filler.
8. The vision distance detection automatic zooming optical system based on binocular imaging analysis according to claim 6 or 7, wherein the surface of the auxiliary temple (5) is covered with rubber, and the surface of the rubber is provided with patterns.
CN201911418969.XA 2019-12-31 2019-12-31 Sight distance detection automatic zooming optical system based on binocular imaging analysis Pending CN111505837A (en)

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Cited By (2)

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CN113008528A (en) * 2021-03-10 2021-06-22 大连鉴影光学科技有限公司 Multi-point focal power measuring method for automatically identifying lens type based on eye field principle
CN113568189A (en) * 2021-06-04 2021-10-29 杭州电子科技大学 Zoom glasses and focusing method thereof

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Publication number Priority date Publication date Assignee Title
CN113008528A (en) * 2021-03-10 2021-06-22 大连鉴影光学科技有限公司 Multi-point focal power measuring method for automatically identifying lens type based on eye field principle
CN113008528B (en) * 2021-03-10 2022-07-29 大连鉴影光学科技有限公司 Multi-point focal power measuring method for automatically identifying lens type based on eye field principle
CN113568189A (en) * 2021-06-04 2021-10-29 杭州电子科技大学 Zoom glasses and focusing method thereof

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Application publication date: 20200807