CN206777305U - Double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument - Google Patents
Double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument Download PDFInfo
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- CN206777305U CN206777305U CN201621406577.3U CN201621406577U CN206777305U CN 206777305 U CN206777305 U CN 206777305U CN 201621406577 U CN201621406577 U CN 201621406577U CN 206777305 U CN206777305 U CN 206777305U
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Abstract
The utility model discloses a kind of double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument, including：First light source, the first lens and dichroscope set gradually along the light path of the first light source；The secondary light source different from the direction of illumination of first light source；Threeth light source different from the direction of illumination of first light source and the secondary light source；The second lens and dichroic mirror set gradually along the reflected light path of the dichroscope；And the reflected light path diaphragm, double-deck light path microscope group and the two dimensional image collector that set gradually along the dichroic mirror.The utility model to optical system for alignment (outer layer light path) by being designed, increase outer layer light path, so as to be separated by imaging optical path (internal layer light path) with the magnifying power of optical system for alignment (outer layer light path), both sensitivity, the raising of alignment precision of front to back registration had been realized, the objectivity and rapidity of alignment, and the easy easily realization of the system can be improved simultaneously.
Description
Technical field
It the utility model is related to Clinical Ophthalmology technical field, especially a kind of double-deck light path high accuracy for Ophthalmoligic instrument
Rapid alignment optical system.
Background technology
When common Ophthalmoligic instrument such as optometry unit and fundus camera are checked human eye, inspection personnel passes through view screen
On the definition of image judge whether alignment accurate, and this process is time-consuming longer and certain subjectivity be present, causes
Alignment is inaccurate, and then causes a series of inspection errors.
Existing patented technology CN02122186:Propose a kind of self-aligning method of Ophthalmoligic instrument, its method be
Put an aperture with two prisms on optical system for alignment, this light path to pupil into seem three separation points, according to three
Whether the relative position of the point of separation accurate to judge alignment, when three points it is vertical point-blank when, then it is now right to illustrate
It is accurate, then illustrate human eye and measuring apparatus hypertelorism when three points are in rotate counterclockwise, when three points are in dextrorotation
When turning, then illustrate that human eye distance measuring equipment is excessively near.The method judges to be compared to the definition of more direct view screen image
For the method for no alignment, solve the accuracy and rapidity of alignment well.The alignment sensitivity of the method with to quasi-optical
The optical shaft orientation magnifying power on road is directly related, i.e., when human eye is aligned, logitudinal magnification is bigger, and equipment moves forward and backward unit distance
When, the trend for the three points separation being able to observe that on the image of collection is more obvious, and its alignment sensitivity is higher, and this is special
The method that profit employs eyes imaging light path and optical system for alignment shares a light path, this allows for the axial direction amplification of its optical system for alignment
Rate is limited by the magnifying power of imaging optical path, and the magnifying power of imaging optical path is by true field scope (pupil region) and image space
Image device effective area constrains.Its magnifying power can not possibly be improved unrestrictedly, and this sensitivity for allowing for optical system for alignment can not enter
One step improves.Especially (lower cost is typically represented when using the image acquisition device of small size), due to imaging optical path
Logitudinal magnification is smaller, and now the magnifying power of optical system for alignment and the magnifying power of imaging optical path are consistent, i.e., also smaller, this is resulted in
The sensitivity of optical system for alignment is relatively low, also result in and need on the instrument that is aligned in high precision at some (such as myopia laser operation
High-precision keratometry, tonometry etc.), its alignment precision does not reach requirement, limits the application of the method.
It can be seen that the alignment precision for the optical system for alignment design that existing patented method uses is limited to the amplification of pupil image light path
Rate, cause alignment sensitivity and precision can not meet practical application request.Existing patented method is solved because of optical system for alignment magnifying power
The scheme of alignment precision problem, there is very big application value caused by limited.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided one kind is used for
The double-deck light path high accuracy rapid alignment optical system of Ophthalmoligic instrument.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of bilayer for Ophthalmoligic instrument
Light path high accuracy rapid alignment optical system, including：
First light source, the first lens and dichroscope set gradually along the light path of the first light source；
The secondary light source different from the direction of illumination of first light source；
Threeth light source different from the direction of illumination of first light source and the secondary light source；
The second lens and dichroic mirror set gradually along the reflected light path of the dichroscope；
And the reflected light path diaphragm, double-deck light path microscope group and the two dimensional image that set gradually along the dichroic mirror
Collector；
Wherein, the double-deck light path microscope group includes mirror body, the internal layer light path microscope group being arranged in the mirror body and is nested in
The outer layer light path microscope group of the internal layer light path microscope group periphery.
Preferably, the inner-layer channel penetrated along optical path direction is provided with inside the mirror body and is set in the inner-layer channel
The outer layer channel of periphery.
Preferably, the internal layer light path microscope group includes being arranged at intervals at successively in the inner-layer channel along optical path direction
3rd lens, the 4th lens, the 5th lens and the 6th lens.
Preferably, the outer layer light path microscope group includes being arranged at intervals at successively in the outer layer channel along optical path direction
7th lens, the 8th lens and the 9th lens, each lens middle part of the outer layer light path microscope group is equipped with perforate, embedding to coordinate
It is placed on the internal layer light path microscope group periphery.
Preferably, the optical axial of first lens and first light source are with the oculocentric line coincident of people.
Preferably, the center of the dichroscope is in first light source with the oculocentric line of people.
Preferably, the optical axial of second lens overlaps with the reflection axis of the dichroscope.
Preferably, the center of the dichroic mirror is on the reflection axis of the dichroscope.
Preferably, the optical axial of the diaphragm, double-deck light path microscope group and two dimensional image collector and the dichroic
The reflection axis of speculum overlaps.
Preferably, it is characterised in that open three holes along straight line on the diaphragm, be bonded with respectively on two holes of both sides
For deflecting the first wedge and the second wedge of light beam.
Double-deck light path high accuracy rapid alignment optical system of the present utility model for Ophthalmoligic instrument uses double-deck light path
Microscope group forms double-deck light path, and double-deck light path shares a two dimensional image collector to be aligned.Wherein internal layer light path is to people
Eye imaging, its magnifying power match with the image device target surface size used, and internal layer light path is imaging optical path.Outer layer light path because
Only to human eye pupil image (human eye pupil is smaller with respect to human eye), so the magnifying power of outer layer light path can not consider two dimensional image
The limitation of collector size, the i.e. magnifying power of outer layer light path can be different from the magnifying power of internal layer light path, while can also share
One two dimensional image collector, outer layer light path are optical system for alignment.The utility model realizes the light of imaging optical path and optical system for alignment
Road is coaxial and magnifying power separates, and does not interfere with each other optical system for alignment and imaging optical path magnifying power, and then by improving outer layer to quasi-optical
The magnifying power on road realizes front to back registration sensitivity and the lifting of precision.
The beneficial effects of the utility model：The utility model (internal layer light path on the premise of same field range is ensured
Magnifying power is constant), by being redesigned to optical system for alignment (outer layer light path), that is, increase outer layer light path, so as to pass through imaging optical path
(internal layer light path) separates with the magnifying power of optical system for alignment (outer layer light path), has both realized the sensitivity of front to back registration, alignment precision
Improve, while the objectivity and rapidity of alignment can be improved, and the easy easily realization of the system.
Brief description of the drawings
Fig. 1 is the optics knot of the double-deck light path high accuracy rapid alignment optical system of the present utility model for Ophthalmoligic instrument
Structure schematic diagram；
Fig. 2 is the structural representation of diaphragm of the present utility model；
Fig. 3 is the structural representation of double-deck light path microscope group of the present utility model；
Fig. 4 A are the image that system of the present utility model obtains in the too remote state of alignment；
Fig. 4 B are the image that system of the present utility model obtains in the state being aligned；
Fig. 4 C are the image that system of the present utility model obtains in the too nearly state of alignment.
Description of reference numerals：
1-the first light source；2-the first lens；3-dichroscope；4-the second lens；5-dichroic mirror；6-light
Door screen；7-double-deck light path microscope group；8-two dimensional image collector；9a-secondary light source；The light sources of 9b-the 3rd；10-human eye；60—
Interstitial hole；61-the first side opening；62-the second side opening；610-the first wedge；620-the second wedge；70-mirror body；71-outer
Layer passage；72-the seven lens；73-the eight lens；74-the nine lens；75-inner-layer channel；76-the three lens；77—
4th lens；78-the five lens；79-the six lens.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to explanation
Book word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
As Figure 1-4, a kind of double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument of the present embodiment
System, including：
First light source 1, the first lens 2 and dichroscope 3 set gradually along the light path of the first light source 1；First lens 2
With the line coincident at the center of human eye 10, the center of dichroscope 3 is in the first light source 1 with human eye for optical axial and the first light source 1
On the line at 10 centers,
The secondary light source 9a different from the direction of illumination of the first light source 1；
The threeth light source 9b different from the direction of illumination of the first light source 1 and secondary light source 9a；
The second lens and dichroic mirror 5 set gradually along the reflected light path of dichroscope 3；The optics of second lens
Axis is overlapped with the reflection axis of dichroscope 3, and the center of dichroic mirror 5 is on the reflection axis of dichroscope 3；
And the reflected light path diaphragm 6, double-deck light path microscope group 7 and the two dimensional image that set gradually along dichroic mirror 5
Collector 8；The optical axial of diaphragm 6, double-deck light path microscope group 7 and two dimensional image collector 8 and the axis of reflection of dichroic mirror 5
Line overlaps.
Wherein, double-deck light path microscope group 7 includes mirror body 70, the internal layer light path microscope group being arranged in mirror body 70 and is nested in internal layer
The outer layer light path microscope group of light path microscope group periphery.In the inside of mirror body 70 is provided with the inner-layer channel 75 penetrated along optical path direction and is set in
The outer layer channel 71 of the periphery of layer passage 75,
Internal layer light path microscope group includes the 3rd lens the 76, the 4th being arranged at intervals at successively along optical path direction in inner-layer channel 75
Lens 77, the 5th lens 78 and the 6th lens 79.
Outer layer light path microscope group includes the 7th lens the 72, the 8th being arranged at intervals at successively along optical path direction in outer layer channel 71
The lens 74 of lens 73 and the 9th, each lens middle part of outer layer light path microscope group are equipped with perforate, internal layer light path are nested in coordinate
Microscope group periphery.Each lens periphery of outer layer light path microscope group inside mirror body 70 with being fixedly connected.
Wherein, three holes are opened along straight line on diaphragm 6, the interstitial hole 60 in center and first positioned at the both sides of interstitial hole 60
The first wedge for deflecting light beam is bonded with the side opening 62 of side opening 61 and second, the first side opening 61 and the second side opening 62 respectively
610 and second wedge 620, and the first wedge 610 and the second wedge 620 are adhered to diaphragm 6 and met to the side of illumination or backwards to light
According to side.
Wherein, the first lens 2 use collimation lens, to form collimated light beam.
Wherein, the wavelength of secondary light source 9a and the 3rd light source 9b wavelength and the first light source 1 is different, secondary light source 9a and
Three light source 9b are arranged at the first light source 1 in the both sides of the line of centres of human eye 10, and the first light source 1, secondary light source 9a and the 3rd light
The light that source 9b is sent between each other without interference with.
The first film layer is coated with each eyeglass of internal layer light path microscope group, the light only sent by the first light source 1, stops the second light
The light that source 9a and the 3rd light source 9b are sent passes through internal layer light path；It is coated with the second film layer on each eyeglass of outer layer light path microscope group, second
The light that film layer is sent by secondary light source 9a and the 3rd light source 9b, stop the light that the first light source 1 is sent.
Double-deck light path high accuracy rapid alignment optical system of the present utility model for Ophthalmoligic instrument uses double-deck light path
Microscope group 7 forms double-deck light path, and double-deck light path shares a two dimensional image collector 8 to be aligned.Wherein internal layer light path pair
Human eye 10 is imaged, and its magnifying power matches with the image device target surface size used, and internal layer light path is imaging optical path.Outer light
Road is because only to the pupil image of human eye 10 (pupil of human eye 10 with respect to human eye 10 smaller), so the magnifying power of outer layer light path can not be examined
Consider the limitation of the size of two dimensional image collector 8, i.e. the magnifying power of outer layer light path can be different from the magnifying power of internal layer light path, simultaneously
A two dimensional image collector 8 can also be shared, outer layer light path is optical system for alignment.The utility model realizes imaging optical path and right
The light path coaxial on quasi-optical road and magnifying power separates, do not interfere with each other optical system for alignment and imaging optical path magnifying power, and then pass through raising
The magnifying power of outer layer optical system for alignment realizes front to back registration sensitivity and the lifting of precision.
The double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument that the present embodiment provides, during work, by
The light that first light source 1 is sent forms collimated light beam by the first lens 2, and collimated light beam shines human eye 10 by dichroscope 3, passes through
Cross the light that the corneal reflection of human eye 10 is returned to return along light path, be irradiated on dichroscope 3, it is saturating to reflex to second by dichroscope 33
Mirror, by being irradiated to again on dichroic mirror 5 after the second lens, the light equipped with wedge is re-reflected into by dichroic mirror 5
Door screen 6, light is by the interstitial hole 60 in the center of diaphragm 6, and then light is again successively through in the internal layer light path microscope group of double-deck light path microscope group 7
3rd lens 76, the 4th lens 77, the 5th lens 78 and the 6th lens 79, finally form image on two dimensional image collector 8
In in middle point b (the point b) in such as Fig. 4 A, 4B, 4C；
It is irradiated to by the two-beam of secondary light source 9a and the 3rd light source the 9b another wavelength sent on the cornea of human eye 10, by
Then the corneal reflection of human eye 10 reflexes to the second lens on dichroscope 3 by dichroscope 3, by after the second lens again according to
It is mapped on dichroic mirror 5, the diaphragm 6 equipped with wedge is re-reflected into by dichroic mirror 5, two-beam passes through diaphragm respectively
The first side opening 61 and the second side opening 62 on 6, and certain angle occurs under the first wedge 610 and the effect of the second wedge 620 respectively
The deviation of degree, then the 7th lens 72 in the outer layer light path microscope group Jing Guo double-deck light path microscope group 7, the and of the 8th lens 73 successively again
9th lens 74, finally formed on two dimensional image collector 8 point a and point c (point a and point c) in such as Fig. 4 A, 4B, 4C, wherein
Point a is formed by the light of the first wedge 610, point c is formed by the light of the second wedge 620, according to three points a, b, c relative position
Put, it can be determined that be directed at the correctness of position.Fig. 4 A show the system with being obtained during 10 front to back registration hypertelorism of human eye
Image；Fig. 4 B show the image that the system obtains with the front to back registration of human eye 10 when correct；Fig. 4 C show the system and people
The when obtained image of 10 front to back registration hypotelorisms of eye.
Wherein, radius of curvature 1 is the radius of curvature of lens side to light, and radius of curvature 2 is the radius of curvature of lens shady face.
In the present embodiment, the magnifying power of outer layer light path microscope group is different from the magnifying power of internal layer light path microscope group, to realize imaging optical path (internal layer
Light path) separated with the magnifying power of optical system for alignment (outer layer light path), and the magnifying power of outer layer light path microscope group is more than internal layer light path microscope group
Magnifying power so that the double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument of the present embodiment obtains very
High alignment sensitivity and alignment precision.
The magnifying power of outer layer light path microscope group is changed by changing the parameter value of wherein each lens, such as the curvature half of lens
Mutual distance of footpath, thickness, material, lens etc., when needing to change the sensitivity of alignment, as long as changing outer layer light path mirror
The magnifying power of group, so the utility model is not limited to double-deck light path, can also be by the light path group of three layers of light path or more layer
Into, the thus light path of at least two different sensitivities, the light path of muting sensitivity can carry out coarse alignment (determine one it is right
Accurate is a wide range of), then accurately alignment (small range in a wide range of is accurately aligned) is carried out with highly sensitive light path, this
Sample can more rapidly and is accurately aligned, and shortens the alignment time.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model
System.
Although embodiment of the present utility model is disclosed as above, it is not restricted in specification and embodiment
Listed utilization.It can be applied to various suitable fields of the present utility model completely.For those skilled in the art,
Other modification is easily achieved.Therefore under the universal limited without departing substantially from claim and equivalency range, this reality
Specific details is not limited to new and shown here as the legend with description.
Claims (10)
- A kind of 1. double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument, it is characterised in that including：First light source, the first lens and dichroscope set gradually along the light path of the first light source；The secondary light source different from the direction of illumination of first light source；Threeth light source different from the direction of illumination of first light source and the secondary light source；The second lens and dichroic mirror set gradually along the reflected light path of the dichroscope；And gathered along the reflected light path diaphragm, double-deck light path microscope group and the two dimensional image that set gradually of the dichroic mirror Device；Wherein, the double-deck light path microscope group includes mirror body, the internal layer light path microscope group being arranged in the mirror body and is nested in described The outer layer light path microscope group of internal layer light path microscope group periphery.
- 2. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, is provided with inside the mirror body along the inner-layer channel of optical path direction insertion and leads to the outer layer for being set in the inner-layer channel periphery Road.
- 3. the double-deck light path high accuracy rapid alignment optical system according to claim 2 for Ophthalmoligic instrument, its feature It is, the internal layer light path microscope group includes being arranged at intervals at the 3rd lens in the inner-layer channel, the successively along optical path direction Four lens, the 5th lens and the 6th lens.
- 4. the double-deck light path high accuracy rapid alignment optical system according to claim 3 for Ophthalmoligic instrument, its feature It is, the outer layer light path microscope group includes being arranged at intervals at the 7th lens in the outer layer channel, the successively along optical path direction Eight lens and the 9th lens, each lens middle part of the outer layer light path microscope group are equipped with perforate, are nested in coordinating in described Layer light path microscope group periphery.
- 5. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, the optical axial of first lens is with first light source with the oculocentric line coincident of people.
- 6. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, the center of the dichroscope is in first light source with the oculocentric line of people.
- 7. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, the optical axial of second lens overlaps with the reflection axis of the dichroscope.
- 8. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, the center of the dichroic mirror is on the reflection axis of the dichroscope.
- 9. the double-deck light path high accuracy rapid alignment optical system according to claim 1 for Ophthalmoligic instrument, its feature It is, the optical axial of the diaphragm, double-deck light path microscope group and two dimensional image collector and the reflection of the dichroic mirror Axis overlaps.
- 10. the double-deck light path high accuracy rapid alignment light for Ophthalmoligic instrument according to any one in claim 1-9 System, it is characterised in that open three holes along straight line on the diaphragm, be bonded with respectively for deflect light on two holes of both sides The first wedge and the second wedge of beam.
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| CN201621406577.3U CN206777305U (en) | 2016-12-21 | 2016-12-21 | Double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument |
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| CN201621406577.3U CN206777305U (en) | 2016-12-21 | 2016-12-21 | Double-deck light path high accuracy rapid alignment optical system for Ophthalmoligic instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725297A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院苏州生物医学工程技术研究所 | For the double-deck light path high accuracy rapid alignment optical system of Ophthalmoligic instrument |
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2016
- 2016-12-21 CN CN201621406577.3U patent/CN206777305U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725297A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院苏州生物医学工程技术研究所 | For the double-deck light path high accuracy rapid alignment optical system of Ophthalmoligic instrument |
| CN106725297B (en) * | 2016-12-21 | 2019-02-19 | 中国科学院苏州生物医学工程技术研究所 | The double-deck optical path high-precision rapid alignment optical system for Ophthalmoligic instrument |
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