CN105250071A - Apparatus for weight-compensating movable suspension of focusing objective of laser system - Google Patents
Apparatus for weight-compensating movable suspension of focusing objective of laser system Download PDFInfo
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- CN105250071A CN105250071A CN201510544460.5A CN201510544460A CN105250071A CN 105250071 A CN105250071 A CN 105250071A CN 201510544460 A CN201510544460 A CN 201510544460A CN 105250071 A CN105250071 A CN 105250071A
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- weight
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- 239000000725 suspension Substances 0.000 title claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 230000005465 channeling Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 210000004087 cornea Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 206010033670 Panic reaction Diseases 0.000 description 1
- 101150034459 Parpbp gene Proteins 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000002430 laser surgery Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Laser Surgery Devices (AREA)
Abstract
An apparatus for a weight-compensating movable suspension of a focusing objective (12) of a laser system (10) comprises a force generating device for generating a counterforce component (G) counteracting the weight force of the focusing objective (12), a transmitting device which transmits the counterforce component (G) to the focusing objective (12) and allows an up/down compensation movement of the focusing objective, and a guide device for movably guiding the focusing objective, in such a way that during an up/down compensation movement of the focusing objective (12), an optical axis (O) of the focusing objective (12) maintains at least its spatial orientation and preferably its spatial position.
Description
The application is the divisional application that name is called " device for the mobile weight compensating suspension of the focusing objective len of laser system ", international filing date is on March 3rd, 2010, international application no is PCT/EP2010/001319, national applications number is the application for a patent for invention of 201080065117.8.
Technical field
The present invention relates to the mobile weight compensating suspension of the focusing objective len of laser system.Described laser system preferably provides pulsed laser radiation, and this pulsed laser radiation is focused onto by focusing objective len the desired locations that radiation will act on.
Background technology
Relating to the treatment of biological tissue and the occasion of directly contact between tissue and laser system, the mobile weight compensating suspension of focusing objective len is not only but is especially supposed to.Such as, when performing an operation to human eye with laser surgery, often there is this direct contact when other tissue using ultra-short pulse laser radiation at cornea or eyes manufactures otch.In this case, directly contact is intended to accurately locate eyes to be treated in the direction of radiation propagation relative to laser system.Usually, suitable interface unit (interfaceunit) (patient fittings's device) is connected before focusing objective len, and realizes the physical connection of eyes and laser system.Interface unit has the keeper for contact element being coupled to focusing objective len usually, and contact element will be accessed eyes and is made up of the material penetrating laser radiation energy.Such as, contact element can be the planar underside (planeunderside) for flattening cornea.
Focusing objective len in laser system is generally poly-lens system, and sizable weight may be placed on balance by it.For this focusing objective len, some kilograms is not rare.Obviously, in ocular surgical, whole weight of focusing objective len must be able to not rest on the eyes that are just being treated.Therefore, the weight compensating suspension for focusing objective len is provided.Such as, when this weight compensating scheme, the focusing objective len power be still applied on eyes reduces to a little newton (such as, 1 to 2N).Such as, if this makes patient lift his or her head in spite of oneself suddenly, in panic reaction, can leniently and to eyes do not injure upwards deflection focusing object lens.
The example of the weight compensating suspension of focusing objective len is provided in US5336215.There, the weight of object lens is compensated by spring system, and object lens rely on spring system and relative to the mobile suspension of framework in the frame.
Summary of the invention
The object of this invention is to provide the reliable and accurate function scheme of a weight compensating for the focusing objective len in laser system.
According to the present invention, the mobile weight compensating suspension of the focusing objective len of laser system is provided in order to this object, comprises:
-force generating apparatus, this force generating apparatus is for generation of the reaction force components of the weight of the described focusing objective len of counteracting;
-actuating device, described reaction force components to be delivered on described focusing objective len and to allow the up/down compensating motion of described focusing objective len by this actuating device; With
-guiding device, this guiding device is used for guiding described focusing objective len movably, to make when the up/down compensating motion of described focusing objective len, the optical axial of described focusing objective len at least keeps its orientation in space and preferably keeps it in the position in space.
When the up/down compensating motion of described object lens, stoped the less desirable inclination of the described optical axial of described object lens by focusing objective len described in described guide means guide.At this, " up/down compensating motion " is understood to that described focusing objective len is relative to the motion up or down of described laser system.Therefore, regardless of the compensating motion of described object lens, described optical axial keeps specific direction, such as, for the optical axial of the human eye be just treated for the object be just treated.It is noted that the present invention can be used to the laser system of any application purpose in principle at this, the laser system in the upper work of any material (comprising dead material) can be used to especially, and never be limited to ophthalmic applications object.
Described force generating apparatus can comprise counterweight (counterweight), the quality of this counterweight for generation of at least part of described reaction force components, whole described reaction force components especially.Described counterweight can be made up of single weighted, or alternatively, the wt pts independent by multiple (at least two) is formed, such as multiple independent wt pts can changing quantity or/and can change the mode of position and be used relative to each other, described independent wt pts also can be combined into single gross weight, and takes out separately from described gross weight.By this change of described counterweight, especially can by weight compensating accurately taring (taring).
And, in the present invention, should not get rid of by reaction force components described at least one flexible member generating portion.Because the effective force usually associated with flexible member depends on the shortcoming of distance (elasticity depends on the deformation state of flexible member), described force generating apparatus preferably not only produces described reaction force components by flexible member.But it is also imaginabale for being combined with counterweight by one or more flexible members, such as, for the object of the power-distance dependence of carry out desired.
Described actuating device is preferably the form of rocking bar, and described reaction force components acts on the side of rocking bar, and the described weight of described focusing objective len acts on the opposite side of rocking bar.Functionally, described rocking bar can compared with lever scale (weighingbeam).
Such as, described rocking bar is formed by least one body of rod, and a lever arm of at least one body of rod described is connected to described focusing objective len, and another lever arm of at least one body of rod described is connected to described force generating apparatus.Understand, two or more this body of rod can be adjacent to, abreast and be provided at a certain distance form described rocking bar.The point of force application of described force generating apparatus on the described body of rod can be conditioned along the described body of rod, and then the moment of regulating action on the described body of rod.Usually, the distance of the pivot center of at least one point of force application on described rocking bar of preferred described force generating apparatus and described rocking bar can be conditioned.
The side (namely on a lever arm) being applied to described rocking bar has with the use producing the counterweight of at least part of described reaction force components the advantage making produced reaction force components maximum possible constant in the movement travel required for the whole operation of described focusing objective len.Expressly moved relative to described rocking bar by the center of gravity of described counterweight, the power-distance feature curve of draft hitch can clearly be set.This makes it possible to taring, even if having impartible counterweight.On the other hand, if described force generating apparatus comprises at least one flexible member, except the typical spring-like power-distance feature of flexible member, the power-distance feature curve of draft hitch can be set, because the point of force application of flexible member can move along described bar or along described rocking bar.
Described focusing objective len is preferably supported on described rocking bar, rotates relative to described rocking bar with the rotation axis making its pivot center being parallel to described rocking bar that can be centered around a distance extend.In order to the stability of the locus of the optical axial of described object lens, suggestion focusing objective len is supported on described rocking bar with the distance that can change apart from the pivot center of described rocking bar.If described rocking bar is tilted, so described focusing objective len can move simultaneously, means and changes and described rocker shaft linear distance.By this way, described object lens can linearly instead of annularly move in path up and down, and namely described object lens keep its lateral attitude relative to the described object lens worked (being laterally meant to described object lens axis at a right angle).
The rolling bearing of described rocking bar is preferably low friction type, and is such as performed by plastic sliding bearing or rolling bearing.Low friction is ideal goal, is the effective power-distance feature for avoiding the frictional force covering (overlaid) to distort described draft hitch as far as possible.
In a preferred embodiment, described focusing objective len is supported on stayed surface structure (arrangement) of described rocking bar, can move freely to make it.Especially, described stayed surface structure can be and makes described object lens be laid loosely upon the base form on described rocking bar.Such as, described stayed surface structure can be formed by least one longitudinal fluting of at least one body of rod of described rocking bar, and described object lens can be inserted into suitable supporting pin or other supporting construction at least one groove described.Such as, described groove can upwards opening, or/and its longitudinal extent of relevant lever arm that can firmly grasp relative to described object lens and opening to front or rear, makes the described supporting construction of described object lens can from being inserted into described groove above or below.
Understand, such as, described stayed surface structure is alternately the structural form of one or more (enclosed) elongated holes closed, and described object lens engage each elongated hole by suitable supporting projections.Also understand, according to amendment, described stayed surface structure can be formed on described object lens, can be formed on described rocking bar for being supported on the constructional suitable supporting construction of described stayed surface.
Under any circumstance, the support of described object lens on described rocking bar preferably not only makes object lens described in the rotational motion process of described rocking bar can rotate relative to described rocking bar, and the distance between the rotation axis of described object lens and described rocking bar axis can radial be changed (relative to rocking bar axis on radial).
The straight line that described guiding device preferably has the channeling direction parallel with the described optical axial of described focusing objective len guides form.Described guiding device preferably has the guide structure of the motion stoping described focusing objective len crosscut optical axial when the up/down compensating motion of described focusing objective len.This is useful for stablizing the position of described object lens in space.
Such as, described guiding device can comprise linear bearing and directed slide block within it.Described slide block can be fixed on described focusing objective len.Described linear bearing also can comprise at least one guiding groove.Described slide block also can comprise at least one guide protrusion, and at least one guide protrusion described fitted to be and worked by the mode avoided to make the motion in the horizontal direction of described slide block with described guiding groove.By this way, make the guiding in the vertical direction of described focusing objective len become possibility, the described optical axial of described focusing objective len can keep it to aim at and position when its compensating motion relative to initial position.In order to this object, described guiding groove can be formed to have undercutting (undercut), and described guide protrusion is engaged in undercutting.
According to another viewpoint, the invention provides a kind of laser system, comprising:
-lasing source, is preferably pulsed laser radiation;
-focusing objective len, for making described laser emission focus on, described focusing objective len has optical axial;
-interface unit, described interface unit is disposed on the radiation outlet side of described focusing objective len, and be preferably and can be connected to described focusing objective len discretely, described interface unit has the contact element penetrated for described laser radiation energy, and described contact element is placed on and will uses on the object that works thereon of described laser emission.
-draft hitch, be the above-mentioned type especially, this draft hitch is the mobile weight compensating suspension of described focusing objective len, this device has the rocking bar containing two rocker arm, described rocking bar is supported on housing member to make described rocking bar can be rotated around the rocking bar axis of described laser system, described focusing objective len is supported on in described rocker arm to make described focusing objective len can rotate around the rotation axis being parallel to described rocking bar axis relative to described rocking bar, counterweight for generation of the reaction force components of at least most weight of the described focusing objective len of compensation is attached in another rocker arm, described reaction force components compensates at least most weight of described focusing objective len, described device also has the guidance system for can guide described focusing objective len with moving linearly along the described optical axial of described focusing objective len.
Accompanying drawing explanation
The present invention is set forth further below based on accompanying drawing.
Fig. 1 schematically and the embodiment for manufacturing the laser system of otch at the cornea of human eye or other tissue part is not shown not pari passu.
Detailed description of the invention
Laser system is marked as 10 as a whole, only illustrates in the accompanying drawings " deferent segment (outputstage) " of laser system, and namely focusing objective len 12 and the patient fittings's device 13 be arranged on the radiation outlet side of focusing objective len 12 are only shown substantially.Focusing objective len 12 also can be hung by weight compensating movably by draft hitch 14.If mentioned herein " weight compensating ", it is meant to the weight of the overwhelming majority at least compensating object lens 12.The residual fraction little especially of object lens weight can still for not compensating, and the such as order of magnitude is the weight of a little newton.Focusing objective len 12 is not to be focused on the focal position for the treatment of cut ocular tissue in by what provided by laser system 10 without burnt laser irradiation ray bundle by the mode shown in more detail.Such as, the laser emission used to have in pulse width within the scope of femtosecond and low infra-red range in (such as, at about 1000nm and approximately between 1110nm) or ultraviolet range and preferred wavelength on about 300nm.
In the embodiment shown in fig. 1, draft hitch 14 has the force generating apparatus containing counterweight 16, and this force generating apparatus produces the vertical weight component pointed to
it is intended to should the weight of compensating focusing object lens 12 at least in part by counterweight.Draft hitch 14 also comprises the actuating device of rocking bar 18 form, and rocking bar 18 right hand end in FIG can be connected to counterweight 16 discretely, and rocking bar 18 in FIG another, left hand end has bearing block 20 for connecting with focusing objective len 12 discretely.Counterweight 16 can move along the suitable lever arm of rocking bar, and to make the effective point of force application K of counterweight be changed, thus the effective moment of reaction can be changed.
Rocking bar 18 is carried by bearing 22, and the rotational axis x making rocking bar 18 can be centered around the distance between the application point of object lens 12 and the application point of counterweight 16 rotates.Bearing 22 is via by one or more connection cheek 21 supporting crank 18 on the support section 23 that schematically indicates, and support section 23 itself can be arranged to and maybe can move relative to other part stationary of laser system 10.
Such as, that rocking bar 18 can have square circle (oblong), substantially straight especially bar (leverrod) 19, bar 19 one end is coupled to object lens 12, and the other end is coupled to counterweight 16.Expressly, two this bars 19 are provided in the both sides of object lens 12 (that is, in the direction of observation of Fig. 1, with above after object lens 12) in parallel with each other.But only a bar will be mentioned in a further description, but following explanation is applied to two bars similarly.
In shown example, the groove 24 (being indicated by dotted line) that above mentioned bearing block 20 is made up of the side direction of bar 19 is formed, and groove 24 more than open on side, is namely upwards and left in the drawings.Bottom land (floor) 24a of this groove 24 forms the stayed surface of trunnion 26, and trunnion 26 side direction is away from object lens 12 and stretch in groove.Focusing objective len 12 is loosely rested on bar 19 by its trunnion 26.If rocking bar 18 is rotated, not only object lens 12 are rotated around axle journal axis relative to rocking bar 18, and trunnion 26 is moved in bearing block 20.Along with this moves, trunnion 26 changes with the radial distance of rotational axis x.No matter object lens 12 move up or down, and this makes it possible to keep Liar axes O not to be changed in the position in space and direction.Thus trunnion 26 is moved when not rubbing as far as possible in bearing block 20, such as trunnion 26 can carry the ring 28 on slip or rolling bearing, and ring 28 can roll on the bottom land 24a of groove 24.
Draft hitch 14 also comprises the guidance system for the guided focused object lens 12 of vertical linearity.And in bearing block 20 mobile trunnion 26 probability produce when object lens 12 move, object lens axes O is in the precondition of the constant position in space, guidance system guarantees that in fact object lens axes O is not tilted or be moved transversely (to axes O).
In an illustrated embodiment, guidance system comprises the linear bearing 30 fixing relative to focusing objective len 12 and to be guided on linear bearing 30 and the slide block 32 be fixed on focusing objective len 12.Linear bearing 30 is provided with guiding groove 34, and guiding groove 34 is the form of undercutting and engages the guide protrusion 36 of slide block 32.In the embodiment shown in fig. 1, the cross section of guide protrusion 36 is T-shaped, and two T side arm 36a of guide protrusion 36 engage undercutting guiding groove 34 to make focusing objective len 12 away from the level (transverse direction) of linear bearing 30 (in FIG to the right) mode be prevented from of moving.In addition, the joint of T side arm 36a and undercutting guiding groove 34 guarantees that focusing objective len 12 does not tilt.Focusing objective len 12 always directed device remains on specific direction.
Guide protrusion 36 provides sufficient vertical play, to guarantee the movement travel of focusing objective len 12 necessity in the vertical direction with the joint of guiding groove 34.
If focusing objective len 12 and its patient fittings's device 13 are placed to (not shown) on eyes to be treated, focusing objective len 12 is offset vertically upward by the small counter-pressure caused by eyes.With regard to the compensating motion of focusing objective len 12, trunnion 26 moves by rolling (or being replaced by slip) along the bottom land 24a of groove 24, and rocking bar 18 turns clockwise around rocking bar axis X, object lens 12 rotate around the axis of trunnion 26 relative to rocking bar 18 simultaneously.By contrast, when imagination supposes, if focusing objective len 12 is rigidly connected to rocking bar 18, the motion up or down of focusing objective len 12 will cause oblique optical axes O.But in an illustrated embodiment, due to the mobile support of object lens 12 on rocking bar 18, and guide due to the straight line of object lens 12 by linear bearing 30, this inclination is excluded.
Claims (8)
1., for a device for the mobile weight compensating suspension of the focusing objective len of laser system, comprising:
Force generating apparatus, this force generating apparatus is for generation of the reaction force components of the weight of the described focusing objective len of counteracting;
Actuating device, described reaction force components to be delivered on described focusing objective len and to allow the up/down compensating motion of described focusing objective len by this actuating device; With
Guiding device, this guiding device is used for guiding described focusing objective len movably, and to make when the up/down compensating motion of described focusing objective len, the optical axial of described focusing objective len at least keeps it in the orientation in space.
2. device according to claim 1, wherein said force generating apparatus comprises counterweight, and the quality of this counterweight is for generation of at least part of described reaction force components.
3. device according to claim 1, wherein said actuating device is the form of rocking bar, and described reaction force components acts on the side of described rocking bar, and at least part of weight of described focusing objective len acts on the opposite side of described rocking bar.
4. device according to claim 3, the distance of the pivot center of at least one point of force application on described rocking bar of wherein said force generating apparatus and described rocking bar can be conditioned.
5. device according to claim 3, wherein said focusing objective len is supported on described rocking bar, can be centered around the pivot center being parallel to described rocking bar of a distance and the rotation axis extended rotates relative to described rocking bar to make described focusing objective len.
6. device according to claim 5, wherein said focusing objective len is supported on described rocking bar with the distance that can change apart from the described pivot center of described rocking bar.
7. device according to claim 1, wherein said guiding device is rectilinear guide form, has the parallel channeling direction of the described optical axial relative to described focusing objective len.
8. device according to claim 7, wherein said guiding device has guide structure, and described guide structure stops the motion of optical axial described in described focusing objective len crosscut when the up/down compensating motion of described focusing objective len.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510544460.5A CN105250071B (en) | 2010-03-03 | 2010-03-03 | The device of the mobile weight compensating suspension of focusing objective len for laser system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510544460.5A CN105250071B (en) | 2010-03-03 | 2010-03-03 | The device of the mobile weight compensating suspension of focusing objective len for laser system |
| CN201080065117.8A CN102834755B (en) | 2010-03-03 | 2010-03-03 | Arrangement for movable weight-compensated suspensions of focusing objectives for laser systems |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080065117.8A Division CN102834755B (en) | 2010-03-03 | 2010-03-03 | Arrangement for movable weight-compensated suspensions of focusing objectives for laser systems |
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| Publication Number | Publication Date |
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| CN105250071A true CN105250071A (en) | 2016-01-20 |
| CN105250071B CN105250071B (en) | 2018-09-21 |
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| EP4362872B1 (en) | 2021-06-30 | 2026-04-29 | AMO Development, LLC | Counterbalance mechanism in ophthalmic laser system employing a variable beam balance to provide a variable net load |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4896015A (en) * | 1988-07-29 | 1990-01-23 | Refractive Laser Research & Development Program, Ltd. | Laser delivery system |
| US5336215A (en) * | 1993-01-22 | 1994-08-09 | Intelligent Surgical Lasers | Eye stabilizing mechanism for use in ophthalmic laser surgery |
| CN101080206A (en) * | 2005-01-11 | 2007-11-28 | 卡尔蔡司医疗技术股份公司 | Safety Mechanisms for Laser Therapy Devices |
| CN101626744A (en) * | 2007-02-14 | 2010-01-13 | 齐默控股公司 | Ophthalmic Devices for Ocular Tissue Breakdown |
-
2010
- 2010-03-03 CN CN201510544460.5A patent/CN105250071B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4896015A (en) * | 1988-07-29 | 1990-01-23 | Refractive Laser Research & Development Program, Ltd. | Laser delivery system |
| US5336215A (en) * | 1993-01-22 | 1994-08-09 | Intelligent Surgical Lasers | Eye stabilizing mechanism for use in ophthalmic laser surgery |
| CN101080206A (en) * | 2005-01-11 | 2007-11-28 | 卡尔蔡司医疗技术股份公司 | Safety Mechanisms for Laser Therapy Devices |
| CN101626744A (en) * | 2007-02-14 | 2010-01-13 | 齐默控股公司 | Ophthalmic Devices for Ocular Tissue Breakdown |
| CN101626743A (en) * | 2007-02-14 | 2010-01-13 | 齐默控股公司 | Ophthalmic equipment used to break down eye tissue |
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