CN108897117A - It is a kind of to be split automatically as focusing system and its focusing method - Google Patents
It is a kind of to be split automatically as focusing system and its focusing method Download PDFInfo
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- CN108897117A CN108897117A CN201810488546.4A CN201810488546A CN108897117A CN 108897117 A CN108897117 A CN 108897117A CN 201810488546 A CN201810488546 A CN 201810488546A CN 108897117 A CN108897117 A CN 108897117A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
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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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Abstract
The present invention relates to optical devices technologies fields.It is a kind of to be split automatically as focusing system and its focusing method, including two infrared focus points being set gradually along optical path as generator, an optometry unit eyepiece, an image rotation convex lens and an imaging sensor, one is equipped between convex lens and imaging sensor to split as Focusing mechanism, and by splitting as Focusing mechanism, focusing point image is generated on the image sensor.The present invention generates the two focusing point images in left and right by using the mode split as focusing on the image sensor, and clearly in the same focusing point image of left and right two on horizontal line, defocus time point rapidly goes to discrete spot for formation when focus.By the way that the judgement exchanged focus image and whether be in same horizontal line will be converted to the judgement of image definition, the subjective bias generated by image definition is avoided, the accuracy of focusing is improved.
Description
Technical field
The present invention relates to optical technical fields, and in particular to a kind of autofocus system.
Background technique
Optometry unit is the precision instrument that the eyes of a kind of couple of people are either objectively or subjectively measured, it can measure bending for eyes
Luminosity, cylindrical mirror degree and axle position provide supplemental characteristic for eyes diagnosis and treatment and with mirror.Optometry unit uses Image Information Processing, optical system
The multinomial technology such as system, intelligent circuit, by near infrared light human eye measuring system, the reflectogram of acquisition and analysis human eye eyeground
Picture handles to obtain refraction data through software.
Optometry unit need to position optometry unit eyepiece between human eye top dome focus in optometry.
Previous optometry unit generallys use image planes positioning mode, due to the clear of picture with it is fuzzy between without specific boundary,
Therefore it will receive the subjective impact of optist in optometry, it is difficult to accomplish quick, accurate, stable positioning, to influence optometry
The accuracy of data.
Summary of the invention
It is split automatically the object of the present invention is to provide a kind of as focusing system solves at least one above technical problem.
The present invention also aims to, provide it is a kind of split automatically as the focusing method of focusing system solve it is above at least one
Technical problem.
Technical problem solved by the invention can be realized using following technical scheme：
It is a kind of to split automatically as focusing system, including two infrared focus points being set gradually along optical path as generator, one
Optometry unit eyepiece, an image rotation convex lens and an imaging sensor, which is characterized in that the convex lens and described image sensor it
Between be equipped with one and split as Focusing mechanism, and split by described as Focusing mechanism, generate and adjust on the photosurface of described image sensor
Focus image.
The present invention generates the two focusing point images in left and right on the image sensor, closes by using the mode split as focusing
It is formed when burnt clearly in the same focusing point image of left and right two on horizontal line, defocus time point rapidly goes to discrete
Spot.By the way that the judgement exchanged focus image and whether be in same horizontal line will be converted to the judgement of image definition, avoid
The subjective bias generated by image definition, improves the accuracy of focusing.
Described split is split including two pieces of double wedges arranged up and down as mirror as Focusing mechanism, and double wedges are split as mirror is by two pieces
The center of circle of semicircle wedge composition, respectively the first wedge and the second wedge, two pieces of wedges is overlapped, first wedge and
In the same plane, another plane of refraction intermeshes one plane of refraction of second wedge, makes first wedge and described
Center of circle central symmetry of second wedge about first wedge；
Double wedges split the side that intermeshes as mirror plane of refraction towards described image sensor.
Wedge in pairs is combined by two pieces of wedges to split as mirror, is made to split as focus adjusting mechanism is more compact, occupied space is smaller.
Double wedges are split as being equipped with one group of telecentric lens between mirror and described image sensor.Telecentric lens can be one
In fixed object distance range, the image enlargement ratio made be will not change.
Described image sensor connects a display screen for displaying images.
The collected focusing point image of imaging sensor is exported by display screen, directly it is judged convenient for user.
It is a kind of to be split automatically as focusing method, which is characterized in that optometry unit eyepiece is arrived using splitting automatically as focusing system
Distance is positioned between human eye top dome focus.
It is described to be split automatically as focusing system, including two infrared focus points as generator, an optometry unit eyepiece, an image rotation it is convex
Lens and an imaging sensor, and set gradually along optical path, one is additionally provided between the convex lens and described image sensor
It splits as Focusing mechanism.
Described split is split including two pieces of double wedges arranged up and down as mirror as Focusing mechanism, and double wedges are split as mirror is by two pieces
The center of circle of semicircle wedge composition, respectively the first wedge and the second wedge, two pieces of wedges is overlapped, first wedge and
In the same plane, another plane of refraction intermeshes one plane of refraction of second wedge, makes first wedge and described
Center of circle central symmetry of second wedge about first wedge；
Double wedges split the side that intermeshes as mirror plane of refraction towards described image sensor.
Double wedges are split as being equipped with one group of telecentric lens between mirror and described image sensor.
Described image sensor connects a display screen for displaying images.
It is described to be split automatically as focusing method, include the following steps：
Step 1, the infrared light that infrared focus point is issued as generator reflex to optometry unit eyepiece via human eye ball；
Step 2, infrared light enters after deflecting via convex lens to be split as Focusing mechanism, and every piece of double wedges split the rear as mirror
Generate the two focusing point images in left and right；
Step 3, imaging sensor acquisition focusing point image, and export on a display screen；
Step 4 splits the eyepiece as Focusing mechanism at a distance from human eye top dome focus by adjusting, makes the tune on display screen
Focus image position links, until the two focusing point images in left and right are all on the horizontal line among display screen.
In step 4, if the focusing point image in left side is higher than horizontal line, the focusing point image on right side is lower than horizontal line, then says
Bright focal length is excessive；If the focusing point image in left side is lower than horizontal line, the focusing point image on right side is higher than horizontal line, then illustrates focal length
It is too small.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram split automatically in the present invention as focusing system；
Fig. 2 is the light path schematic diagram of the first wedge in the present invention；
Fig. 3 is the light path schematic diagram of the second wedge in the present invention；
Fig. 4 is a kind of schematic diagram split automatically as focusing point image in focusing method step 4.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating that the present invention is further explained.
Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4, a kind of to be split automatically as focusing system, two including setting gradually along optical path red
Outer focus point is passed as generator 1, an optometry unit eyepiece 2, an image rotation convex lens 3 and an imaging sensor 4, convex lens 3 and image
It is equipped with one between sensor 4 to split as Focusing mechanism, and by splitting as Focusing mechanism, generates and adjusts on the photosurface of imaging sensor 4
Focus image.The present invention generates the two focusing point images in left and right by using the mode split as focusing on imaging sensor 4,
It is formed when focus clearly in the same focusing point image of left and right two on horizontal line, defocus time point rapidly goes to discrete
Spot.By the way that the judgement exchanged focus image and whether be in same horizontal line will be converted to the judgement of image definition, keep away
Exempt from the subjective bias generated by image definition, improves the accuracy of focusing.
It splits and is split including two pieces of double wedges arranged up and down as mirror 5 as Focusing mechanism, double wedges are split as mirror 5 is by two pieces of semicircles
Wedge composition, respectively the first wedge 6 and the second wedge 7, the center of circle coincidence of two pieces of wedges, the first wedge 6 and the second wedge 7
In the same plane, another plane of refraction intermeshes one plane of refraction, makes the first wedge 6 and the second wedge 7 about the first wedge 6
Center of circle central symmetry；Double wedges split the side that intermeshes as 5 plane of refraction of mirror towards imaging sensor 4.By two pieces of wedge groups
It synthesizes double wedges to split as mirror 5, make to split as focus adjusting mechanism is more compact, occupied space is smaller.
Double wedges are split as being equipped with one group of telecentric lens 6 between mirror 5 and imaging sensor 4.Telecentric lens 6 can be certain
In object distance range, the image enlargement ratio made be will not change.
Imaging sensor 4 connects a display screen for displaying images.Imaging sensor 4 is exported by display screen to collect
Focusing point image, directly it is judged convenient for user.
It is a kind of to be split automatically as focusing method, it is split using automatic as focusing system is come burnt to human eye top dome to optometry unit eyepiece 2
Distance is positioned between point；Automatically it splits as focusing system, including two infrared focus points are as generator 1, an optometry unit eyepiece
2, an image rotation convex lens 3 and an imaging sensor 4, and set gradually along optical path, between convex lens 3 and imaging sensor 4 also
It splits equipped with one as Focusing mechanism；It splits and is split including two pieces of double wedges arranged up and down as mirror 5 as Focusing mechanism, double wedges are split as mirror 5
It is made of two pieces of semicircle wedges, the center of circle of respectively the first wedge 6 and the second wedge 7, two pieces of wedges is overlapped, the first wedge 6
In the same plane with a plane of refraction of the second wedge 7, another plane of refraction intermeshes, and makes the first wedge 6 and the second wedge 7
Center of circle central symmetry about the first wedge 6；Double wedges split the side that intermeshes as 5 plane of refraction of mirror towards imaging sensor 4.
Double wedges are split as being equipped with one group of telecentric lens 6 between mirror 5 and imaging sensor 4.The connection of imaging sensor 4 one is for showing image
Display screen.
Automatically it splits as focusing method, includes the following steps：
Step 1, infrared focus point reflex to optometry unit eyepiece 2 via human eye ball as the infrared light that generator 1 issues；
Step 2, infrared light enters after deflecting via convex lens 3 to be split as Focusing mechanism, and every piece of double wedges are split as after mirror 5
Side generates the two focusing point images in left and right；
Step 3, the acquisition of imaging sensor 4 focusing point image, and export on a display screen；
Step 4 splits the eyepiece 2 as Focusing mechanism at a distance from human eye top dome focus by adjusting, makes the tune on display screen
Focus image position links, until the two focusing point images in left and right are all on the horizontal line among display screen.
As shown in figure 4, if the focusing point image in left side is higher than horizontal line, the focusing point image on right side is lower than in step 4
Horizontal line then illustrates that focal length is excessive；If the focusing point image in left side is lower than horizontal line, the focusing point image on right side is higher than level
Line then illustrates that focal length is too small.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
- It splits automatically 1. a kind of as focusing system, including two infrared focus points being set gradually along optical path as generator, one test Light instrument eyepiece, an image rotation convex lens and an imaging sensor, which is characterized in that between the convex lens and described image sensor It splits equipped with one as Focusing mechanism, and is split by described as Focusing mechanism, focusing is generated on the photosurface of described image sensor Point image.
- 2. one kind according to claim 1 is split automatically as focusing system, it is characterised in that：It is described to split as Focusing mechanism includes Two pieces of double wedges arranged up and down are split as mirror, and double wedges, which are split, to be made of as mirror two pieces of semicircle wedges, respectively the first light The center of circle of wedge and the second wedge, two pieces of wedges is overlapped, and a plane of refraction of first wedge and second wedge exists On same plane, another plane of refraction intermeshes, and makes first wedge and second wedge about first wedge Center of circle central symmetry；Double wedges split the side that intermeshes as mirror plane of refraction towards described image sensor.
- 3. one kind according to claim 1 or 2 is split automatically as focusing system, it is characterised in that：Double wedges are split as mirror One group of telecentric lens is equipped between described image sensor.
- 4. one kind according to claim 1 or 2 is split automatically as focusing system, it is characterised in that：Described image sensor connects Connect a display screen for displaying images.
- 5. a kind of split automatically as focusing method, which is characterized in that using splitting automatically as focusing system is come to optometry unit eyepiece to people Distance is positioned between the focus of eyeball top.
- 6. one kind according to claim 5 is split automatically as focusing method, it is characterised in that：It is described to be split automatically as focusing system System, including two infrared focus points are as generator, an optometry unit eyepiece, an image rotation convex lens and an imaging sensor, and along Optical path is set gradually, and one is additionally provided between the convex lens and described image sensor and is split as Focusing mechanism；Described split is split including two pieces of double wedges arranged up and down as mirror as Focusing mechanism, and double wedges are split as mirror is by two pieces of semicircles The center of circle of shape wedge composition, respectively the first wedge and the second wedge, two pieces of wedges is overlapped, first wedge and described In the same plane, another plane of refraction intermeshes one plane of refraction of the second wedge, makes first wedge and described second Center of circle central symmetry of the wedge about first wedge；Double wedges split the side that intermeshes as mirror plane of refraction towards described image sensor.
- 7. one kind according to claim 5 is split automatically as focusing method, it is characterised in that：Double wedges are split as mirror and institute It states and is equipped with one group of telecentric lens between imaging sensor.
- 8. one kind according to claim 5 is split automatically as focusing method, it is characterised in that：Described image sensor connection one Display screen for displaying images.
- 9. one kind according to any one of claim 5-8 is split automatically as focusing method, it is characterised in that：Including following Step,Step 1, the infrared light that infrared focus point is issued as generator reflex to optometry unit eyepiece via human eye ball；Step 2, infrared light enters after deflecting via convex lens to be split as Focusing mechanism, and every piece of double wedges are split as the rear of mirror is raw At the two focusing point images in left and right；Step 3, imaging sensor acquisition focusing point image, and export on a display screen；Step 4 splits the eyepiece as Focusing mechanism at a distance from human eye top dome focus by adjusting, makes the focusing point on display screen Image position links, until the two focusing point images in left and right are all on the horizontal line among display screen.
- 10. one kind according to claim 9 is split automatically as focusing system, it is characterised in that：In step 4, if the tune in left side Focus image is higher than horizontal line, and the focusing point image on right side is lower than horizontal line, then illustrates that focal length is excessive；If the focusing point shadow in left side As being lower than horizontal line, the focusing point image on right side is higher than horizontal line, then illustrates that focal length is too small.
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| CN201810488546.4A CN108897117A (en) | 2018-05-21 | 2018-05-21 | It is a kind of to be split automatically as focusing system and its focusing method |
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| CN201810488546.4A CN108897117A (en) | 2018-05-21 | 2018-05-21 | It is a kind of to be split automatically as focusing system and its focusing method |
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| CN109307936A (en) * | 2018-11-28 | 2019-02-05 | 湖北华中光电科技有限公司 | A kind of auxiliary device for accelerating astro tracker pointing velocity |
| CN110186653A (en) * | 2019-05-29 | 2019-08-30 | 长春理工大学 | The light axis consistency of non-imaging system is calibrated and is split as fixed-focus debugging device and method |
| CN110584591A (en) * | 2019-09-03 | 2019-12-20 | 佛山科学技术学院 | High-precision portable diopter detector |
| CN114252985A (en) * | 2021-12-02 | 2022-03-29 | 浙江大学 | Automatic focusing double-telecentric optical integrated camera |
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| EP1567908A1 (en) * | 2002-12-06 | 2005-08-31 | Carl Zeiss | Auto-focussing glasses and method for auto-focussing a pair of glasses |
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| CN114252985A (en) * | 2021-12-02 | 2022-03-29 | 浙江大学 | Automatic focusing double-telecentric optical integrated camera |
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Application publication date: 20181127 |