CN102576147A - Zoom lens for microscope, and microscope - Google Patents
Zoom lens for microscope, and microscope Download PDFInfo
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- CN102576147A CN102576147A CN2010800458397A CN201080045839A CN102576147A CN 102576147 A CN102576147 A CN 102576147A CN 2010800458397 A CN2010800458397 A CN 2010800458397A CN 201080045839 A CN201080045839 A CN 201080045839A CN 102576147 A CN102576147 A CN 102576147A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144105—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-+-
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/02—Objectives
- G02B21/025—Objectives with variable magnification
Abstract
Provided is a zoom lens for a microscope, which receives approximately parallel light from an objective lens, and forms an image on the imaging surface of an imaging element. Also provided is a microscope having said zoom lens for a microscope. The zoom lens for a microscope is an object-space telecentric lens, is small, and has a high zoom ratio and a high image-forming performance. The zoom lens for a microscope is provided, from the object side, with a first lens group (G1) having a positive refractive power, a second lens group (G2) having a negative refractive power, a third lens group (G3) having a positive refractive power, and a fourth lens group (G4) having a negative refractive power. The fourth lens group comprises, from the object side, an eleventh lens group having a positive refractive power, a twelfth lens group having a negative refractive power, and a thirteenth lens group having a positive refractive power. The second lens group (G2) and the third lens group (G3) move along the optical axis direction when the magnification is being changed from a low magnification end to a high magnification end. A given condition is applied between the first lens group and the second lens group, and between the eleventh lens group and the twelfth lens group constituting the fourth lens group.
Description
Technical field
The microscope that the present invention relates to use in a kind of microscope is with zoom lens and have the microscope of this microscope with zoom lens.
Background technology
In the past, the microscope that had proposed to use in the microscope is with zoom lens and have the microscope (for example TOHKEMY flat 6-18784 communique, TOHKEMY 2006-178440 communique) of microscope with zoom lens.
In recent years, in microscope, stereomicroscope, digital microscope etc., in order to measure the measurement function such as size of subject, even a kind of microscope that defocuses the size also indeclinable object side heart far away (Telecentric) of time image of expectation is used zoom lens.This microscope also requires to have high zoom ratios and high imaging performance and small-sized with zoom lens.
But existing microscope is difficult to all satisfy these requirements with zoom lens.
Summary of the invention
The present invention is in view of above problem and occurring, and its purpose is to provide a kind of and guarantees that object side disposition far away and small-sized, as to have high zoom ratios and high imaging performance microscope are with zoom lens and have the microscope of this microscope with zoom lens.
For solving above-mentioned problem, the present invention provides a kind of microscope to use zoom lens, accepts the almost parallel light from object lens, and on the shooting face of imaging apparatus, forms images, it is characterized in that,
Begin to have successively from object side: the 1st lens combination with positive light coke; The 2nd lens combination with negative power; The 3rd lens combination with positive light coke; With the 4th lens combination with negative power,
Above-mentioned the 4th lens combination begins successively to be made up of the 11st lens combination with positive light coke, the 13rd lens combination that has the 12nd lens combination of negative power and have a positive light coke from object side,
From low power end state when high power end state becomes times, above-mentioned the 2nd lens combination and above-mentioned the 3rd lens combination move along optical axis direction,
And meet the following conditions:
0.4＜d1W/|f2|＜0.7，
0.9＜d11/d12＜1.2，
Wherein, d1W be under the low power end state above-mentioned the 1st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 2nd lens combination,
F2 is the focal length of above-mentioned the 2nd lens combination,
D11 be above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination,
D12 be above-mentioned the 12nd lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 13rd lens combination.
Microscope of the present invention preferably also meets the following conditions with zoom lens:
0.05＜d11/|f4|＜0.2，
Wherein, d11 be above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination,
F4 is the focal length of above-mentioned the 4th lens combination.
Further, microscope of the present invention preferably meets the following conditions with zoom lens:
|f1/f2|＞4.5，
Wherein, f1 is the focal length of above-mentioned the 1st lens combination.
Further, preferably also meet the following conditions at microscope of the present invention with zoom lens:
Z
0.5＜V2＜Z
0.6，
Wherein, Z is the zoom ratio of above-mentioned microscope with zoom lens,
V2 is the change multiplying power of above-mentioned the 2nd lens combination.
Preferred in zoom lens at microscope of the present invention, above-mentioned the 2nd lens combination to lean on the lens face of object side most be concave.
Preferred in zoom lens at microscope of the present invention, from low power end state when high power end state becomes times, above-mentioned the 2nd lens combination only from object side to the picture side shifting, above-mentioned the 3rd lens combination is only from moving as the side direction object side.
The present invention provides a kind of microscope through other type, it is characterized in that, has: object lens; Use zoom lens with the microscope of the invention described above.
According to the present invention, can provide a kind of and guarantee that object side disposition far away and small-sized, as to have high zoom ratios and high imaging performance microscope are with zoom lens and have the microscope of this microscope with zoom lens.
Description of drawings
Figure 1A and Figure 1B are that the microscope that relates to of expression an embodiment of the invention is with the basic comprising of zoom lens and the figure of zoom motion track.
Fig. 2 is the figure of expression the application's the microscope that relates to of the 1st embodiment with the lens arrangement of zoom lens.
Fig. 3 A-Fig. 3 C be the microscope that relates to of the 1st embodiment with each aberration diagram under the infinity focusing state of zoom lens, Fig. 3 A representes that low power end state, Fig. 3 B represent that middle focal length state, Fig. 3 C represent each aberration diagram of high power end state.
Fig. 4 is the figure of expression the application's the microscope that relates to of the 2nd embodiment with the lens arrangement of zoom lens.
Fig. 5 A-Fig. 5 C be the microscope that relates to of the 2nd embodiment with each aberration diagram under the infinity focusing state of zoom lens, Fig. 5 A representes that low power end state, Fig. 5 B represent that middle focal length state, Fig. 5 C represent each aberration diagram of high power end state.
The figure of the lens arrangement of one example of Fig. 6 object lens that to be the microscope that relates to embodiment of the present invention of expression use with the zoom lens combination.
Fig. 7 is that expression has microscope that embodiment of the present invention the relates to figure with the microscopical optical system of zoom lens.
Embodiment
Below the microscope that relates to of explanation embodiment of the present invention is used zoom lens.And following embodiment only is for easy to understand invention, does not get rid of the additional/displacement that can in not breaking away from technological thought scope of the present invention, be implemented by those skilled in the art etc.
The microscope that this embodiment relates to begins from object side with zoom lens to have successively: have positive light coke the 1st lens combination, have negative power the 2nd lens combination, have the 3rd lens combination of positive light coke and have the 4th lens combination of negative power; The lens face of object side that leans on most of above-mentioned the 2nd lens combination has concave shape; From low power end state when high power end state becomes times; Above-mentioned the 2nd lens combination and above-mentioned the 3rd lens combination move along optical axis direction, and conditional (1), (2) and (3) below satisfying.
(1)0.4＜d1W/|f2|＜0.7
(2)|f1/f2|＞4.5
(3)Z
0.5＜V2＜Z
0.6
Wherein, D1W represent under the low power end state above-mentioned the 1st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 2nd lens combination; F2 representes the focal length of above-mentioned the 2nd lens combination; F1 representes the focal length of above-mentioned the 1st lens combination, and Z representes the zoom ratio of above-mentioned microscope with zoom lens, and V2 representes the change multiplying power of above-mentioned the 2nd lens combination.
Through this formation; It is below 0.013 ° that this microscope can make the about 7 one-tenth locational key lights and the optical axis angulation in the visual field (object height) under the low power end state with zoom lens, can realize guaranteeing object side disposition far away and have high zoom ratios more than 15 times, small-sized and microscope that have a high imaging performance is used zoom lens.
Conditional (1) has been stipulated: the 1st lens combination under the low power end state lean on most interval between the lens face of object side, the i.e. proper range of interval and the ratio of the focal length of the 2nd lens combination of the optical axis direction of the 1st lens combination and the 2nd lens combination by the lens face of picture side and the 2nd lens combination.Through the formula of satisfying condition (1), make entrance pupil position under the low power end state away from object plane, can guarantee the object side disposition far away under the low power end state.
When surpassing the higher limit of conditional (1), it is big that the external diameter of object lens becomes, and the change of the coma when becoming times increases.
When the lower limit of less-than condition formula (1), the entrance pupil position under the low power end state is near object plane, and the rate of change of the picture size when defocusing increases, and therefore can't guarantee object side disposition far away.
This microscope with zoom lens in, the lens face of object side that leans on most of the 2nd lens combination has concave shape, the lens that therefore have this concave shape are bend light rays easily, the 2nd lens combination of the formula (1) that suppresses to satisfy condition produces coma.
Conditional (2) has been stipulated the proper range of ratio of the focal length of the 1st lens combination and the 2nd lens combination.Through the formula of satisfying condition (2), can realize guaranteeing the high zoom ratios more than 15 times and make the entrance pupil position under the low power end state use zoom lens away from object plane, small-sized and microscope that have a high imaging performance.
When the lower limit of less-than condition formula (2), the interval of the optical axis direction of the 1st lens combination and the 2nd lens combination narrows down, and the 1st lens combination and the 2nd lens combination are disturbed, and therefore can't reduce the multiplying power under the low power end state, and the result can't obtain high zoom ratios.And if under the state of the lower limit of less-than condition formula (2), obtain high zoom ratios, then the interval of the 1st lens combination and the 2nd lens combination becomes big, can't realize miniaturization.And, under the state of the lower limit of less-than condition formula (2),, also can't obtain the high zoom ratios more than 15 times even will increase the focal power of the 3rd lens combination and the 4th lens combination and improve zoom ratio.
Conditional (3) has been stipulated the proper range of the change multiplying power of the 2nd lens combination.Through the formula of satisfying condition (3), when can realize keeping compactly with the total length of zoom lens microscope, microscope with high imaging performance uses zoom lens.In addition, in this manual, " change multiplying power " represented for " the bear amount " of microscope with " zoom ratio " of zoom lens.
When surpassing the higher limit of conditional (3), it is big that the focal power of the 2nd lens combination becomes, and improved " amount of bearing " of the 2nd lens combination, therefore helps the miniaturization of microscope with zoom lens.But this moment, under low power end state, the change increase of coma, especially below coma when producing the astigmatism that distortion increases, Yin Pozi cuts down and the deterioration of (Petzval sum) causes and increasing, become times etc., generation spherical aberration increase etc. under high power end state.
When the lower limit of less-than condition formula (3), if will obtain high zoom ratios, then the change multiplying power of the 3rd lens combination increases, and the amount of movement of the 3rd lens combination when becoming times increases.Consequently, for preventing the interference of the 2nd lens combination and the 3rd lens combination, need to prolong the interval of the 2nd lens combination and the 3rd lens combination, microscope becomes big with the total length of zoom lens, can't realize miniaturization.
And this microscope is preferred with zoom lens, and the 4th lens combination begins successively to be made up of the 11st lens combination with positive light coke, the 13rd lens combination that has the 12nd lens combination of negative power and have a positive light coke from object side.Through this formation, can proofread and correct each aberration well, realize the miniaturization of microscope zoom lens.
With positive lens constitute the 4th lens combination by the lens of picture side the time, and constitute this with negative lens and lean on most and compare as the lens of side, can shorten back focal length, the zoom lens total length diminishes.
And this microscope has the 1st～the 4th lens combination with zoom lens, therefore comprises 4 groups of situation about constituting.Generally speaking; 4 groups of zoom lens that constitute are divided into condenser lens (the 1st group: focus and focal adjustment), become doubly (variator) lens the zooming system lens), (the 3rd group: on compensation (compensator) lens correcting lens), (the 4th group: imaging len), each group has independently effect respectively to image rotation (relay) lens (the 2nd group:.
The 1st group (condenser lens) has the focus of making and focuses on the effect of being taken the photograph body, and the 2nd group (Zoom lens) has the focal power distribution before and after changing and change the effect of picture size, and the 3rd group (offset lens) links with Zoom lens, has the effect that focus departs from of proofreading and correct.And; The 4th group is also referred to as image rotation lenses or main lens (master lens); Has following effect: proofread and correct the aberration that in the zoom portion that constitutes by the 1st group～the 3rd group condenser lens, Zoom lens, offset lens, produces, and make the virtual image that forms in the zoom portion revert to real image and imaging.
Therefore, the 4th group has the effect that makes by the picture imaging that forms in the 1st group to the 3rd group zoom portion that constitutes, so when becoming times, certain basically through the 4th group light beam, in 4 groups of zoom lens that constitute, the 4th group plays a role as lens independently.Therefore, be positive and negative, positive three-piece structure through making the 4th group, can carry out the correction of each aberration well.
And this microscope is with the zoom lens formula (4) that preferably meets the following conditions.
(4)0.9＜d11/d12＜1.2
Wherein, D11 represent above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination, d12 represent above-mentioned the 12nd lens combination the lens face that leans on the picture side most and above-mentioned the 13rd lens combination lean on the interval between the lens face of object side most.
Conditional (4) stipulated between the 12nd lens combination and the 13rd lens combination the interval, and the 11st lens combination and the 12nd lens combination between the proper range of ratio at interval.Through the formula of satisfying condition (4); In the 4th lens combination; Distance between the 11st lens combination and the 12nd lens combination, and the 12nd lens combination and the 13rd lens combination between distance equal basically, can carry out the correction of the correction of each aberration, especially spherical aberration, coma well.
When surpassing the higher limit of conditional (4), the interval of the 11st lens combination and the 12nd lens combination becomes excessive, and curvature of the image worsens.
When the lower limit of less-than condition formula (4), coma, spherical aberration worsen.
And this microscope is with the zoom lens formula (5) that preferably meets the following conditions.
(5)0.05＜d11/|f4|＜0.2
Wherein, d11 represent above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination, f4 representes the focal length of above-mentioned the 4th lens combination.
Conditional (5) stipulated the 4th lens combination focal length, and the 4th lens combination in the 11st lens combination and the interval between the 12nd lens combination.Through the formula of satisfying condition (5), can guarantee suitable back focal length, make the outgoing pupil location away from image planes.
The component structure of imaging apparatuss such as CCD; For example chromatic filter, light accepting part are positioned at the inboard of the light shielding part etc. of electric charge transfer path; Therefore when the light oblique incidence is in element; The variation (aberration), the peripheral light amount that produce tone change (light and shade variation), thus when being configured to imaging apparatuss such as CCD on the image planes, need be designed to the emergent pupil set positions must be as far as possible away from image space, light is almost vertically incided in the element.And, dispose eyepiece, when observing, also be that the emergent pupil position is easy to carry out the observation of picture more more away from image planes, and can prevent the optical performance degradation of microscope itself through eyepiece in the back of image planes.
When surpassing the higher limit of conditional (5), it is too short that back focal length becomes, even will imaging apparatuss such as for example CCD be configured on the image planes, also can't guarantee its space, or when having assembled the optics adjustment behind the lens, can can't guarantee the movably scope of image planes.
When the lower limit of less-than condition formula (5), the emergent pupil position is near image planes, and back focal length is elongated.The result is that microscope is big with the total length change of zoom lens, can't realize miniaturization.
And this microscope is preferred with zoom lens, from low power end state when high power end state becomes times, above-mentioned the 2nd lens combination only from object side to the picture side shifting, above-mentioned the 3rd lens combination is only from moving as the side direction object side.Through such formation, can simplify the travel mechanism of the lens combination when becoming times.
And the application's the microscopical microscope with above-mentioned formation that is characterised in that is used zoom lens.So, can realize guaranteeing object side disposition far away and have high zoom ratios, small-sized and have a microscope of high imaging performance.
The following microscope that relates to according to this embodiment of description of drawings is with each numerical value embodiment of zoom lens.
Figure 1A and 1B represent that microscope general among each numerical value embodiment is with the basic comprising of zoom lens and the figure of zoom motion track.
The microscope that each embodiment relates to begins successively to be made up of the 1st lens combination G1 with positive light coke, the 2nd lens combination G2 with negative power, the 4th lens combination G4 that has the 3rd lens combination G3 of positive light coke and have a negative power from object side with zoom lens, and the lens face of object side that leans on most of the 2nd lens combination G2 has concave shape.
Among Figure 1A, the 1B, I representes image planes.
This microscope with zoom lens from low power end state (Figure 1A) during to high power end state (Figure 1B); The 2nd lens combination G2 only from object side to the picture side shifting; The 3rd lens combination G3 is only from moving as the side direction object side, so that reduce the airspace of the 2nd lens combination G2 and the 3rd lens combination G3.Therefore, this microscope with zoom lens from low power end state when high power end state becomes times, the 2nd lens combination and the 3rd lens combination only move to a direction, can not appear at the track that returns midway.
(the 1st embodiment)
Fig. 2 is the figure of the microscope that relates to of expression the 1st embodiment with the lens arrangement of zoom lens.
The microscope that the 1st embodiment relates to begins successively to be made up of the 1st lens combination G1 with positive light coke, the 2nd lens combination G2 with negative power, aperture diaphragm S, the 4th lens combination G4 that has the 3rd lens combination G3 of positive light coke and have a negative power from object side with zoom lens.
The 1st lens combination G1 begins to be made up of following successively from object side: engage the joint positive lens that forms through convex surface towards the negative meniscus lens L11 of object side and the positive lens L12 of biconvex shape; With the positive meniscus shaped lens L13 of convex surface towards object side.
The 2nd lens combination G2 begins to be made up of following successively from object side: the negative lens L21 of concave-concave shape; Engage the joint negative lens that forms with negative lens L22 and convex surface towards the positive meniscus shaped lens L23 of object side through the concave-concave shape.
The 3rd lens combination G3 begins to be made up of following successively from object side: the positive lens L31 of concave-concave shape; Engage the joint positive lens that forms through convex surface towards the negative meniscus lens L32 of object side and the positive lens L33 of biconvex shape.
The 4th lens combination G4 begins to be made up of following successively from object side: the 11st lens combination G4a with positive light coke; The 12nd lens combination G4b with negative power; With the 13rd lens combination G4c with positive light coke.
The 11st lens combination G4a constitutes by engaging positive lens, and this joints positive lens forms the positive lens L41 of biconvex shape and the negative lens L42 joint of concave-concave shape through beginning from object side successively.
The 12nd lens combination G4b constitutes by engaging negative lens, and this joints negative lens forms convex surface through beginning from object side successively towards the plano-convex lens L43 of image planes I side and the negative lens L44 joint of concave-concave shape.
The 13rd lens combination G4c is made up of the positive lens L45 of biconvex shape.
The microscope that following table 1 expression the 1st embodiment relates to is with each parameter value of zoom lens.
In (lens data), object plane is represented object plane, and the face number is represented from the order of the lens face of object side number; R representes the radius-of-curvature of each lens face, the face that d representes lens face at interval, nd representes the d line (refractive index of wavelength X=587.6nm); ν d representes the d line (Abbe number of wavelength X=587.6nm); The face interval that (variable) expression is variable, (aperture) expression aperture diaphragm S, image planes are represented image planes I.In addition, radius-of-curvature r " ∞ " representes plane, the record of having omitted the refractive index n d=1.000000 of air.
In (various data), f representes focal length, and FNO representes F value (F number), and Y representes image height, and Bf representes back focal length, di (i: variable spacing value among presentation surface number i integer).(conditional respective value) represented the respective value of each conditional respectively.The comprehensive multiplying power of the total system when in addition, the β microscope representing the object lens shown in the below table 4 are installed to following each embodiment is with zoom lens.
The unit of the focal distance f of in following all parameter value, putting down in writing in addition,, radius-of-curvature r, other length generally uses " mm ".But optical system is in proportional amplification or dwindle the equal optical property of Shi Junke acquisition, therefore is not limited thereto.Unit is not limited to " mm ", also can use other suitable units.Further, these symbols after other embodiment in also identical, omit explanation.
(table 1) the 1st embodiment
Fig. 3 A-Fig. 3 C be the microscope that relates to of the 1st embodiment with each aberration diagram under the infinity focusing state of zoom lens, Fig. 3 A representes that low power end state, Fig. 3 B represent that middle focal length state, Fig. 3 C represent each aberration diagram of high power end state.In addition, during as the actual use of microscope, use with the combination of object lens shown in the below table 3, but in the present embodiment, be the performance of good representation microscope, microscope only is shown with the aberration diagram of zoom lens the ray tracing of infinity (promptly from) with zoom lens.
In each aberration diagram, FNO representes the F value, and Y representes image height.And d representes that (wavelength X=587.56nm), C represent that (wavelength X=656.27nm), F represent that (wavelength X=486.13nm), g represent the g line (aberration curve of wavelength X=435.84nm) to the F line to the C line to the d line.
In astigmatism figure, solid line is represented sagittal image surface, and dotted line is represented meridianal image surface.
In addition, in each aberration diagram of each embodiment shown in following, also use the symbol identical with present embodiment.
Can know by each aberration diagram, the microscope that this 1st embodiment relates to zoom lens at low power end state, middle focal length state, reach under each state of high power end state, can proofread and correct each aberration well, have good imaging performance.Even have 20 times of high like this zoom ratios of zoom ratio, also can guarantee the object side disposition far away under the low power end state.
(the 2nd embodiment)
Fig. 4 is the figure of the microscope that relates to of expression the 2nd embodiment with the lens arrangement of zoom lens.
The microscope that the 2nd embodiment relates to begins successively to be made up of the 1st lens combination G1 with positive light coke, the 2nd lens combination G2 with negative power, aperture diaphragm S, the 3rd lens combination G3 with positive light coke, the 4th lens combination with negative power from object side with zoom lens.
The 1st lens combination G1 begins to be made up of following successively from object side: engage the joint positive lens that forms through convex surface towards the negative meniscus lens L11 of object side and the positive lens 12 of biconvex shape; With the positive meniscus shaped lens L13 of convex surface towards object side.
The 2nd lens combination G2 begins to be made up of following successively from object side: the negative lens L21 of concave-concave shape; Engage the joint negative lens that forms with negative lens L22 and convex surface towards the positive meniscus shaped lens L23 of object side through the concave-concave shape.
The 3rd lens combination G3 begins to be made up of following successively from object side: the positive lens L31 of biconvex shape; With engage the joint positive lens that forms by convex surface towards the positive lens L33 of the negative meniscus lens L32 of object side and biconvex shape.
The 4th lens combination G4 begins to be made up of following successively from object side: the 11st lens combination G4a with positive light coke; The 12nd lens combination G4b with negative power; With the 13rd lens combination G4c with positive light coke.
The 11st lens combination G4a constitutes by engaging positive lens, and this joints positive lens forms positive meniscus shaped lens L41 and the convex surface of convex surface towards object side through beginning from object side successively towards the negative meniscus lens L42 of object side joint.
The 12nd lens combination G4b constitutes by engaging negative lens, and this joints negative lens forms convex surface through beginning from object side successively towards the positive meniscus shaped lens L43 of image planes I side and the negative lens L44 joint of concave-concave shape.
The 13rd lens combination G4c is made up of the positive meniscus shaped lens L45 of convex surface towards image planes I side.
The microscope that following table 2 expressions the 2nd embodiment relates to is with each parameter value of zoom lens.
(table 2) the 2nd embodiment
Fig. 5 A-Fig. 5 C be the microscope that relates to of the 2nd embodiment with each aberration diagram under the infinity focusing state of zoom lens, Fig. 5 A representes that low power end state, Fig. 5 B represent that middle focal length state, Fig. 5 C represent each aberration diagram of high power end state.
Can know by each aberration diagram, the microscope that this 2nd embodiment relates to zoom lens at low power end state, middle focal length state, reach under each state of high power end state, can proofread and correct each aberration well, have good imaging performance.Even have 15 times of high like this zoom ratios of zoom ratio, also can guarantee the object side disposition far away under the low power end state.
The microscope that present embodiment relates to for example can be with shown in Figure 6 and use in the combination of the object lens of each parameter value shown in the following table 3 with zoom lens.
Fig. 6 is the figure of the lens arrangement of these object lens of expression.
(table 3)
Fig. 7 is that expression has microscope that embodiment the relates to figure with the microscopical optical system of zoom lens.
After being transformed to directional light from the light of object through object lens shown in Figure 62, when becoming doubly, on image planes I, form the picture of object through zoom lens 3.And, for example the observer observe via not shown eyepiece should picture, perhaps configuration is observed via monitor as the image unit of imaging apparatus I such as CCD on image planes.On image planes, during image unit such as configuration CCD etc., can observe metal sample, mechanical fitting bigger objects such as (for example gears) well with the bigger visual field.
Claims (7)
1. a microscope is used zoom lens, accepts the almost parallel light from object lens, and on the shooting face of imaging apparatus, forms images, it is characterized in that,
Begin to have successively from object side: the 1st lens combination with positive light coke; The 2nd lens combination with negative power; The 3rd lens combination with positive light coke; With the 4th lens combination with negative power,
Above-mentioned the 4th lens combination begins successively to be made up of the 11st lens combination with positive light coke, the 13rd lens combination that has the 12nd lens combination of negative power and have a positive light coke from object side,
From low power end state when high power end state becomes times, above-mentioned the 2nd lens combination and above-mentioned the 3rd lens combination move along optical axis direction,
And meet the following conditions:
0.4＜d1W/|f2|＜0.7，
0.9＜d11/d12＜1.2，
Wherein, d1W be under the low power end state above-mentioned the 1st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 2nd lens combination,
F2 is the focal length of above-mentioned the 2nd lens combination,
D11 be above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination,
D12 be above-mentioned the 12nd lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 13rd lens combination.
2. microscope according to claim 1 is used zoom lens, it is characterized in that, meets the following conditions:
0.05＜d11/|f4|＜0.2，
Wherein, d11 be above-mentioned the 11st lens combination by the interval between the lens face of object side of leaning on most of the lens face of picture side and above-mentioned the 12nd lens combination,
F4 is the focal length of above-mentioned the 4th lens combination.
3. microscope according to claim 1 and 2 is used zoom lens, it is characterized in that, meets the following conditions:
|f1/f2|＞4.5，
Wherein, f1 is the focal length of above-mentioned the 1st lens combination.
4. microscope according to claim 1 and 2 is used zoom lens, it is characterized in that, meets the following conditions:
Z
0.5＜V2＜Z
0.6，
Wherein, Z is the zoom ratio of above-mentioned microscope with zoom lens,
V2 is the change multiplying power of above-mentioned the 2nd lens combination.
5. microscope according to claim 1 and 2 is used zoom lens, it is characterized in that, above-mentioned the 2nd lens combination most to lean on the lens face of object side be concave.
6. microscope according to claim 1 and 2 is used zoom lens, it is characterized in that, from low power end state when high power end state becomes times, above-mentioned the 2nd lens combination only from object side to the picture side shifting, above-mentioned the 3rd lens combination is only from moving as the side direction object side.
7. a microscope is characterized in that having: object lens; Use zoom lens with claim 1 or 2 described microscopes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-279683 | 2009-12-09 | ||
| JP2009279683 | 2009-12-09 | ||
| PCT/JP2010/071346 WO2011070943A1 (en) | 2009-12-09 | 2010-11-30 | Zoom lens for microscope, and microscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102576147A true CN102576147A (en) | 2012-07-11 |
Family
ID=44145488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800458397A Pending CN102576147A (en) | 2009-12-09 | 2010-11-30 | Zoom lens for microscope, and microscope |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5278558B2 (en) |
| CN (1) | CN102576147A (en) |
| WO (1) | WO2011070943A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137583A (en) * | 2015-07-08 | 2015-12-09 | 宁波舜宇仪器有限公司 | Object lens of microscope |
| WO2018076330A1 (en) * | 2016-10-31 | 2018-05-03 | 中国科学院长春光学精密机械与物理研究所 | Finite conjugate distance optical zoom system with adjustable object distance |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
| WO2024051341A1 (en) * | 2022-09-08 | 2024-03-14 | Oppo广东移动通信有限公司 | Optical lens, camera module and electronic device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013222078A (en) * | 2012-04-17 | 2013-10-28 | Olympus Corp | Microscope objective lens |
| JP6583279B2 (en) * | 2014-10-03 | 2019-10-02 | ソニー株式会社 | Medical stereo microscope optical system and medical observation apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63116113A (en) * | 1986-11-05 | 1988-05-20 | Nikon Corp | Telephoto zoom lens |
| JP2001154092A (en) * | 1999-11-24 | 2001-06-08 | Nikon Corp | Afocal zoom lens, and microscope provided with the same |
| JP2004004827A (en) * | 2002-05-10 | 2004-01-08 | Leica Microsystems (Schweiz) Ag | Afocal zoom system used in microscope |
-
2010
- 2010-11-30 CN CN2010800458397A patent/CN102576147A/en active Pending
- 2010-11-30 WO PCT/JP2010/071346 patent/WO2011070943A1/en active Application Filing
- 2010-11-30 JP JP2011545176A patent/JP5278558B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63116113A (en) * | 1986-11-05 | 1988-05-20 | Nikon Corp | Telephoto zoom lens |
| JP2001154092A (en) * | 1999-11-24 | 2001-06-08 | Nikon Corp | Afocal zoom lens, and microscope provided with the same |
| JP2004004827A (en) * | 2002-05-10 | 2004-01-08 | Leica Microsystems (Schweiz) Ag | Afocal zoom system used in microscope |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137583A (en) * | 2015-07-08 | 2015-12-09 | 宁波舜宇仪器有限公司 | Object lens of microscope |
| WO2018076330A1 (en) * | 2016-10-31 | 2018-05-03 | 中国科学院长春光学精密机械与物理研究所 | Finite conjugate distance optical zoom system with adjustable object distance |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
| WO2024051341A1 (en) * | 2022-09-08 | 2024-03-14 | Oppo广东移动通信有限公司 | Optical lens, camera module and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5278558B2 (en) | 2013-09-04 |
| JPWO2011070943A1 (en) | 2013-04-22 |
| WO2011070943A1 (en) | 2011-06-16 |
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Application publication date: 20120711 |