CN111419172B - Imaging quality detection method and detection device for vision detection system - Google Patents
Imaging quality detection method and detection device for vision detection system Download PDFInfo
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- CN111419172B CN111419172B CN202010359283.4A CN202010359283A CN111419172B CN 111419172 B CN111419172 B CN 111419172B CN 202010359283 A CN202010359283 A CN 202010359283A CN 111419172 B CN111419172 B CN 111419172B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0223—Operational features of calibration, e.g. protocols for calibrating sensors
Abstract
The invention belongs to the field of imaging quality detection of vision detection systems, and particularly relates to an imaging quality detection method and device for a vision detection system, wherein the method comprises the following steps: the emergent light of the sighting target is incident to a vision detection system to be detected; the vision detection system forms a virtual image of the sighting target based on the emergent light rays and emits the virtual image, and two reflectors are adopted to adjust the light path of the emergent light path of the virtual image so as to project the virtual image to the flat lens at a preset angle and a preset size; the plate lens converts the virtual image into a real image and adopts a receiving element to receive the real image; and obtaining the imaging quality of the vision detection system based on real image analysis. According to the invention, two plane reflectors are arranged behind the vision detection system to be detected, so that the length and the direction of the light path of the virtual image are adjusted, the adopted flat lens can convert the virtual image of an object formed by the vision detection optical system into a receivable real image, no aberration exists, the consistency of two-time imaging is ensured, and the detection result is convincing.
Description
Technical Field
The invention belongs to the field of imaging quality detection of vision detection systems, and particularly relates to an imaging quality detection method and device for a vision detection system.
Background
With the development of optical technology, various simple or complex optical elements are continuously widely used in various fields. Among them, various practical optical devices, such as vision detection optical systems, are not lacked. The visual acuity test optical system belongs to a visual optical system, and a visual target displayed on a screen of a mobile phone is amplified and imaged at a certain position through imaging of the optical system, so that the same effect of visual acuity chart detection of human eyes can be simulated, and the same visual acuity test effect can be achieved. The vision detection system is small in size, easy to carry, capable of performing vision detection anytime and anywhere, and low in price. The optical system is a virtual image system, and has certain difficulty for evaluating the image quality of the optical system, especially two key optical parameters of magnification and distortion, the performance and effectiveness of the vision detection system can be directly influenced by the quality of the parameters, the use feeling of a user can be directly influenced, and the accuracy of a detection result is adversely affected, so that the use and the production of the equipment can be influenced by the evaluation of the two optical properties which are decisive.
At present, the detection mode of the system can only be carried out in a manual sampling detection mode, quantification cannot be realized, and the provided detection result is not persuasive.
Disclosure of Invention
The invention provides an imaging quality detection method and device for a vision detection system, which are used for solving the technical problem in the prior art.
The technical scheme for solving the technical problems is as follows: an imaging quality detection method for a vision inspection system, comprising:
the emergent light of the sighting target is incident to a vision detection system to be detected;
the vision detection system forms a virtual image of the sighting target based on the emergent light rays and emits the virtual image, and two reflectors are adopted to adjust the light path of the emergent light path of the virtual image so as to project the virtual image to the flat lens at a preset angle and a preset size;
the flat lens converts the virtual image into a real image, and a receiving element is adopted to receive the real image;
and analyzing to obtain the imaging quality of the vision detection system based on the real image and the sighting mark.
The invention has the beneficial effects that: two plane mirrors are placed at the visual detection system rear that awaits measuring, these two mirrors can pivoting and can the back-and-forth movement (but also intelligent automatic control of artificial control), with this length and the direction to the virtual image light path are adjusted, make light get into dull and stereotyped lens with suitable angle and size, realize accurate clear formation of image, wherein, the dull and stereotyped lens of adoption can change into the virtual image of the visual detection optical system formed object into the real image that can receive, because dull and stereotyped lens does not have the aberration at the conversion in-process, then the real image that the conversion formed does not theoretically have plus aberration, thereby guarantee the uniformity of twice formation of image, make the detection result have convincing power. By utilizing the detectable characteristic of the real image, the specific standard can be given to key optical parameters such as the magnification and distortion of the system to be detected, so that whether the quality of the system to be detected is qualified or not can be judged. The method can detect the key parameters of the imaging quality of the vision detection optical system, compared with the traditional manual spot inspection method, the scheme has the characteristics of high accuracy, easiness in operation, time saving, large-batch detection and the like, and specific numerical values of related optical parameters can be given, so that the quality of products is more convincing.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the receiving element is a wavefront sensor, an interferometer or a CCD.
Further, the sighting target is a display sighting target;
adopting double cemented lenses to amplify the emergent rays of the sighting marks to the vision detection system to be detected; and the parameters to be analyzed for characterizing the imaging quality are magnification and distortion.
The invention has the further beneficial effects that: adopt two cemented lens to make emergent ray can be received by vision detection system is complete, avoid the sighting mark undersize, lead to vision detection system imaging inaccurate, wherein, two cemented lens's interval is known, can be according to the required magnification to the sighting mark of reality, rationally select two cemented lens.
Further, the sighting target is a resolution detection target plate;
the parameter to be analyzed for characterizing the imaging quality is the resolution.
Further, the two reflectors are parallel to each other and form an included angle of 45 degrees with the emergent light path, the preset angle is 60 degrees, and the receiving element and the emergent light of the flat lens form an included angle of 60 degrees.
The invention has the further beneficial effects that: the included angle between each light path component is rationally set, the light beam received by the final flat lens can be converted into a clear and accurate real image, and the imaging quality detection precision of the vision detection system is ensured.
The present invention also provides an imaging quality detection apparatus for a vision inspection system, comprising: the visual target, a vision detection system to be detected, two reflectors, a flat lens and a receiving device;
after the emergent rays of the sighting target are incident to the vision detection system to be detected, the vision detection system forms a virtual image of the sighting target based on the emergent rays and emits the virtual image; the two reflectors adjust the light path of the emergent light path of the virtual image so as to project the virtual image to the flat lens at a preset angle and a preset size; the flat lens converts the virtual image into a real image; and the receiving device receives the real image and analyzes the imaging quality of the vision detection system based on the real image and the sighting mark.
The invention has the beneficial effects that: the device is characterized in that two plane reflectors are arranged behind a vision detection system to be detected, the two plane reflectors can rotate around a shaft and can move back and forth (can be controlled manually or can be controlled intelligently and automatically), so that the length and the direction of a virtual image light path are adjusted, light rays can enter the flat lens at a proper angle and size, accurate and clear imaging is realized, the adopted flat lens can convert a virtual image of an object formed by the vision detection optical system into a receivable real image, and the converted real image theoretically has no external aberration because the flat lens has no aberration in the conversion process, so that the consistency of two times of imaging is ensured, and the detection result is convincing. By utilizing the detectable characteristic of the real image, the specific standard can be given to key optical parameters such as the magnification and distortion of the system to be detected, so that whether the quality of the system to be detected is qualified or not can be judged. The device can detect key parameters of the imaging quality of the vision detection optical system, has the characteristics of high accuracy, easiness in operation, time saving, large-batch detection and the like compared with the traditional manual spot inspection method, and can give specific numerical values of related optical parameters to make the quality of products more convincing.
Further, the sighting target is a display sighting target;
the device further comprises a double-cemented lens for magnifying the emergent light of the sighting mark to the vision detection system to be detected;
the parameters to be analyzed for characterizing the imaging quality are magnification and distortion.
Further, the sighting target is a resolution detection target plate;
the parameter to be analyzed for characterizing the imaging quality is the resolution.
Further, the two reflectors are parallel to each other and form an included angle of 45 degrees with the emergent light path, the preset angle is 60 degrees, and the receiving device and the emergent light of the flat lens form an included angle of 60 degrees.
The invention has the further beneficial effects that: the included angle between each light path component is rationally set, the light beam received by the final flat lens can be converted into a clear and accurate real image, and the imaging quality detection precision of the vision detection system is ensured.
Further, the flat lens is a flat lens having a negative equivalent refractive index.
Drawings
Fig. 1 is a block flow diagram of an imaging quality detection method for a vision inspection system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an imaging quality detection apparatus for a vision inspection system according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1. the system comprises a display sighting mark, 2, a double-cemented lens, 3, a vision detection system to be detected, 4, a first plane reflector, 5, a second plane reflector, 6, a flat lens, 7 and a receiving device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
An imaging quality inspection method 100 for a vision inspection system, as shown in fig. 1, comprising:
120, forming a virtual image of the sighting target by the vision detection system based on the emergent light rays and emitting the virtual image, and adjusting the light path of the emergent light path of the virtual image by adopting two reflectors so as to project the virtual image to the flat lens at a preset angle and a preset size;
and 140, analyzing to obtain the imaging quality of the vision detection system based on the real image and the sighting target.
Two plane mirrors are placed at the eyesight detection system rear that awaits measuring, as shown in fig. 2, these two mirrors can pivoting and can the back-and-forth movement (but also intelligent automatic control of artificial control), adjust the length and the direction of virtual image light path with this, make light get into dull and stereotyped lens with suitable angle and size, realize accurate clear formation of image, wherein, the dull and stereotyped lens of adoption can change into the real image that the virtual image of the eyesight detection optical system formed object into can receive, because dull and stereotyped lens does not have the aberration in the conversion process, then there is not plus aberration in the real image theory that the conversion formed, thereby guarantee the uniformity of twice formation of image, make the detection result have convincing power.
The wavefront sensor can be adopted to receive and analyze the image at the imaged real image, and the detectable characteristic of the real image is utilized to give specific standards to key optical parameters of the system to be detected, such as amplification rate, distortion and the like, so as to judge whether the quality of the system to be detected is qualified. The method can detect key parameters of the imaging quality of the vision detection optical system. Compared with the traditional manual sampling method, the scheme has the characteristics of high accuracy, easiness in operation, time saving, capability of large-batch detection and the like. Meanwhile, specific values of related optical parameters can be given, so that the quality of the product is more convincing, the production is guided, the quality control of the product is enhanced, and the tolerance is loosened.
Preferably, the optotype is a display optotype; in step 110, the double cemented lenses are adopted to amplify the emergent light of the sighting target to a vision detection system to be detected; and in step 140, the parameters to be analyzed for characterizing the imaging quality are magnification and distortion.
In order to enable sighting marks with different sizes to be better received by a vision detection system to be detected, a pair of cemented lenses (with known focal length) is arranged behind the sighting marks, the vision detection system to be detected is arranged at a proper position, and in order to enable emergent rays to be completely received, two plane reflectors with an included angle of 45 degrees with a light path are arranged behind a device to be detected, as shown in figure 1, the reflectors can rotate around a shaft and can move back and forth, so that the length and the direction of the light path are adjusted, the rays can enter a flat lens with a proper angle and size, and the included angle of the flat lens and the light path of the system to be detected is 60 degrees, so that the optimal imaging quality is obtained; the rear end of the flat lens is connected with a wavefront sensor, the included angle between the wavefront sensor and the light path is 60 degrees, and the distance can be correspondingly adjusted according to the size of the display screen. And performing wavefront analysis or image on the image received by the wavefront sensor or the CCD to obtain related parameters such as magnification and distortion of the vision detection system, and completing the detection process.
Preferably, the receiving element is a wavefront sensor, an interferometer or a CCD, wherein the CCD is a charge coupled device, which is an abbreviation of a charge coupled device.
Preferably, the sighting target can be a resolution detection target plate; the parameter to be analyzed for characterizing the imaging quality is resolution in step 140.
In order to project the virtual image to the flat lens at a preset angle and a preset size, the two reflectors are used for adjusting the light path of the emergent light path of the virtual image, because the emergent light is divergent light, the relative distance between the two flat reflectors can be reduced so as to reduce the length of the light path; if the emergent light spot is too small, the relative distance between the two plane reflectors is increased so as to increase the length of the light path; in this way, the spot size on the plate lens is adjusted to some extent. After the light spot is adjusted to be in a proper size, in order to enable the emergent light spot to be shot on the flat lens at a proper angle, the two reflectors have the rotating function, and the light angle can be finely adjusted.
Example two
An imaging quality detection apparatus for a vision inspection system, as shown in fig. 2, comprising: the visual target comprises a visual target 1, a vision detection system 3 to be detected, a first plane reflector 4, a second plane reflector 5, a flat lens 6 and a receiving device 7;
after emergent rays of the sighting target are incident to a vision detection system to be detected, the vision detection system forms a virtual image of the sighting target based on the emergent rays and emits the virtual image; the two reflectors adjust the light path of the emergent light path of the virtual image so as to project the virtual image to the flat lens at a preset angle and a preset size; the plate lens converts the virtual image into a real image; and the receiving device receives the real image and analyzes the real image and the sighting target to obtain the imaging quality of the vision detection system.
When the sighting mark is a display sighting mark; the device also comprises a double-cemented lens 2 which is used for focusing and amplifying emergent light of the visual target to the vision detection system to be detected in advance by a certain size so as to avoid the situation that the vision detection system cannot distinguish due to the over-small visual target, wherein the focal length of the double-cemented lens is known; and the parameters to be analyzed for characterizing the imaging quality are magnification and distortion. When the sighting target is a resolution detection target plate; the parameter to be analyzed for characterizing the imaging quality is the resolution.
Preferably, the two reflectors are parallel to each other and form an included angle of 45 degrees with the emergent light path, the preset angle is 60 degrees, and the receiving device forms an included angle of 60 degrees with the emergent light of the flat lens, so that a real image accurately reflecting the sighting mark is obtained.
Preferably, the flat lens is a flat lens having a negative equivalent refractive index.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An imaging quality detection method for a vision inspection system, comprising:
the emergent light of the sighting target is incident to a vision detection system to be detected;
the vision detection system forms a virtual image of the sighting target based on the emergent light rays and emits the virtual image, two reflectors are adopted to adjust an emergent light path of the virtual image, specifically, the two reflectors rotate around a shaft or move back and forth to adjust the length and the angle of the light path together, so that the virtual image is projected to a flat lens at a preset angle and a preset size;
the flat lens converts the virtual image into a real image, and a receiving element is adopted to receive the real image;
and analyzing to obtain the imaging quality of the vision detection system based on the real image and the sighting mark.
2. The imaging quality detection method for vision inspection system of claim 1 wherein said receiving element is a wavefront sensor, an interferometer or a CCD.
3. The imaging quality detection method for vision inspection system of claim 1, wherein the optotype is a display optotype;
adopting double cemented lenses to amplify the emergent rays of the sighting marks to the vision detection system to be detected; and the parameters to be analyzed for characterizing the imaging quality are magnification and distortion.
4. The imaging quality inspection method for vision inspection system of claim 1, wherein the visual target is a resolution inspection target plate;
the parameter to be analyzed for characterizing the imaging quality is the resolution.
5. The imaging quality detection method for vision inspection system according to any one of claims 1 to 4, wherein said two reflectors are parallel to each other and form an angle of 45 ° with respect to said outgoing light path, said predetermined angle is 60 °, and said receiving element forms an angle of 60 ° with respect to said outgoing light of said flat lens.
6. An imaging quality detection apparatus for use in a vision testing system, comprising: the visual target, a vision detection system to be detected, two reflectors, a flat lens and a receiving device;
after the emergent rays of the sighting target are incident to the vision detection system to be detected, the vision detection system forms a virtual image of the sighting target based on the emergent rays and emits the virtual image; the two reflectors adjust the light path of the emergent light path of the virtual image, specifically, the two reflectors adjust the length and the angle of the light path together by rotating around a shaft or moving back and forth so as to project the virtual image to the flat lens at a preset angle and a preset size; the flat lens converts the virtual image into a real image; and the receiving device receives the real image and analyzes the imaging quality of the vision detection system based on the real image and the sighting mark.
7. The imaging quality detection device for vision inspection system of claim 6, wherein said optotype is a display optotype;
the device further comprises a double cemented lens for magnifying the optotype to the vision detection system to be detected;
the parameters to be analyzed for characterizing the imaging quality are magnification and distortion.
8. The imaging quality detection device for vision inspection system of claim 6, wherein said optotype is a resolution inspection target plate;
the parameter to be analyzed for characterizing the imaging quality is the resolution.
9. The imaging quality detection device of any one of claims 6 to 8, wherein the two reflectors are parallel to each other and form an angle of 45 ° with the exit light path, the predetermined angle is 60 °, and the receiving device forms an angle of 60 ° with the exit light of the flat lens.
10. The imaging quality inspection device of claim 9, wherein the flat lens is a flat lens with a negative equivalent refractive index.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5689377A (en) * | 1995-04-07 | 1997-11-18 | Nikon Corporation | Catadioptric optical system and exposure apparatus having the same |
| CN101183041A (en) * | 2007-11-30 | 2008-05-21 | 上海微电子装备有限公司 | Interferometer and method of use thereof |
| CN209028562U (en) * | 2018-11-16 | 2019-06-25 | 上海先研光电科技有限公司 | A kind of interaction and feedback device based on no medium air-borne imagery |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5689377A (en) * | 1995-04-07 | 1997-11-18 | Nikon Corporation | Catadioptric optical system and exposure apparatus having the same |
| CN101183041A (en) * | 2007-11-30 | 2008-05-21 | 上海微电子装备有限公司 | Interferometer and method of use thereof |
| CN209028562U (en) * | 2018-11-16 | 2019-06-25 | 上海先研光电科技有限公司 | A kind of interaction and feedback device based on no medium air-borne imagery |
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