CN109725409A - A kind of telecentric lens - Google Patents
A kind of telecentric lens Download PDFInfo
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- CN109725409A CN109725409A CN201910083964.XA CN201910083964A CN109725409A CN 109725409 A CN109725409 A CN 109725409A CN 201910083964 A CN201910083964 A CN 201910083964A CN 109725409 A CN109725409 A CN 109725409A
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- telecentric
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Abstract
The invention belongs to optical technical field more particularly to a kind of telecentric lens, including microscope base and the focusing ring being set in the middle part of microscope base；The first lens group, the second lens group, diaphragm, the third lens group and the 4th lens group are equipped with inside microscope base；Second lens group is arranged by the first lens barrel in microscope base, and the 4th lens group is arranged by the second lens barrel in microscope base；First lens barrel is equipped with the first guide part, and the second lens barrel is equipped with the second guide part, and microscope base is equipped with the first guide groove corresponding with the first guide part, and microscope base is equipped with the second guide groove corresponding with the second guide part, is equipped with sliding slot on the inside of focusing ring.Compared with the existing technology, the present invention moves axially the first lens barrel and the second lens barrel in microscope base by rotating focusing ring, changes the standoff distance of each lens group, to realize the effect for adjusting the enlargement ratio of telecentric lens.
Description
Technical field
The invention belongs to optical technical field more particularly to a kind of telecentric lens.
Background technique
Under the overall background of industrial automation, machine vision demand is growing day by day, especially in electronic manufacture, food packaging
In numerous industries such as quality testing, to the resolving accuracies of machine visual lens, it is applicable in the requirements such as working range, optical distortion and gets over
Come higher.
It is excessive to correct traditional industry camera lens parallax, telecentric lens will be used in some high-precision context of detection, it can
It will not change with the image enlargement ratio in certain object distance range, made, this is to measured object not on same object plane
Situation is very important application.Telecentric lens are very high to require lens distortion always due to its distinctive parallel light path design
Machine vision applications occasion favored.It has high image resolution, the near-zero distortion factor, no perspective error, the ultra-wide depth of field
The advantages that.
But the existing generally existing enlargement ratio of telecentric lens is fixed, high to the utilization uniqueness requirement of camera lens, so
The telecentric lens of a fixed multiplying power are only applicable to a matched working environment, so that entreprise cost increases, and cause resource
Waste.Therefore, a kind of telecentric lens that enlargement ratio can be adjusted according to actual working environment are needed.
Summary of the invention
It is an object of the invention to: in view of the deficiencies of the prior art, and a kind of telecentric lens are provided, to solve existing telecentricity
The problem of camera lens can not adjust enlargement ratio according to working environment.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of telecentric lens, including microscope base and the focusing ring being set in the middle part of the microscope base；Along optical axis from object inside the microscope base
End is successively arranged the first lens group, the second lens group, diaphragm, the third lens group and the 4th lens group to image side；Described second
Lens group is arranged by the first lens barrel in the microscope base, and the 4th lens group is arranged by the second lens barrel in the microscope base；
First lens barrel be equipped with the first guide part, second lens barrel be equipped with the second guide part, the microscope base be equipped with it is described
Corresponding first guide groove of first guide part, the microscope base is equipped with the second guide groove corresponding with second guide part, described
Sliding slot is equipped on the inside of focusing ring, first guide part passes through first guide groove and connect with the sliding slot, described second
Guide part passes through second guide groove and connect with the sliding slot；
The focusing ring passes through turnover while driving the first guide part and the second guide part, makes described in the first guide part drive
First lens barrel, first lens barrel move axially in the microscope base along first guide groove, and make second guiding
Part drives second lens barrel, and second lens barrel moves axially in the microscope base along second guide groove.
As the preferred embodiment of telecentric lens of the present invention, the diaphragm is equipped with the tune for adjusting the diaphragm diameter
Handle is saved, the telecentric lens further include the light modulation ring and cooperation cylinder for being set in image side one end of the microscope base, the cooperation cylinder
One end connect with the release handle, it is described cooperation cylinder the other end connect with the light modulation ring；The light modulation ring passes through turnover
The cooperation cylinder is driven to have enough to meet the need, the diameter for making the cooperation cylinder that the release handle be driven to adjust the diaphragm.
As the preferred embodiment of telecentric lens of the present invention, the focusing ring is equipped with focusing locking member, the focusing lock
Tight part is for locking the focusing ring.
As the preferred embodiment of telecentric lens of the present invention, the light modulation is equipped with light modulation locking member, the light modulation lock
Tight part is for locking the light modulation ring.
As the preferred embodiment of telecentric lens of the present invention, first guide groove and second guide groove are edge
The spiral guide slot of the microscope base week surface helix.
As the preferred embodiment of telecentric lens of the present invention, the cooperation cylinder is equipped with hollow-out parts, and the hollow-out parts are used for
It passes through and moves for second guide part.
As the preferred embodiment of telecentric lens of the present invention, first lens group is positive power lens group, described
First lens group from object end to image side successively includes the first lens G1 with positive light coke, with positive light coke along optical axis
Second lens G2, the third lens G3 with positive light coke and the 4th lens G4 with positive light coke；The first lens G1
Successively gluing forms the first balsaming lens U1 with the second lens G2.
As the preferred embodiment of telecentric lens of the present invention, second lens group is negative-power lenses group, described
Second lens group from object end to image side successively includes the 5th lens G5 with positive light coke, with negative power along optical axis
6th lens G6 and the 7th lens G7 with positive light coke；The 6th lens G6 and the 7th lens G7 successively glued shape
At the second balsaming lens U2.
As the preferred embodiment of telecentric lens of the present invention, the third lens group is positive power lens group, described
The third lens group along optical axis from object end to image side successively include the 8th lens G8 with positive light coke, there is positive light coke the
Nine lens, with the tenth lens G9 of positive light coke and have the 11st lens G10 of negative power；The 8th lens G8 and described
9th lens G9 is successively glued to form third balsaming lens U3, the tenth lens G10 and the 11st lens G11 successively glue
It closes and forms the 4th balsaming lens U4.
As the preferred embodiment of telecentric lens of the present invention, the 4th lens group is positive power lens group, described
4th lens group along optical axis from object end to image side successively include the 12nd lens G12 with positive light coke, have positive light focus
It spends the 13rd lens G13 and there is the 14th lens G14 of positive light coke；The 13rd lens G13 and the 14th lens
G14 is successively glued to form the 5th balsaming lens U5.
Of the invention has the beneficial effect that the first lens barrel of the present invention is equipped with the first guide part, second mirror
Cylinder be equipped with the second guide part, the microscope base be equipped with the first guide groove corresponding with first guide part, the microscope base be equipped with
Second guide part corresponding second guide groove is equipped with sliding slot on the inside of the focusing ring, and first guide part passes through described
First guide groove is simultaneously connect with the sliding slot, and second guide part passes through second guide groove and connect with the sliding slot；
The focusing ring passes through turnover while driving the first guide part and the second guide part, and first guide part is made to drive described first
Lens barrel, first lens barrel move axially in the microscope base along first guide groove, and make the second guide part band
Second lens barrel is moved, second lens barrel moves axially in the microscope base along second guide groove.Relative to existing skill
Art, the present invention move axially the first lens barrel and the second lens barrel in microscope base by rotating focusing ring, change each lens group
Standoff distance, to realize the effect for adjusting the enlargement ratio of telecentric lens.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of telecentric lens in the present invention.
Fig. 2 is the explosive view of telecentric lens in the present invention.
Fig. 3 is the cooperation schematic diagram of microscope base, the first lens barrel and the second lens barrel in the present invention.
Fig. 4 is the structural schematic diagram of the first lens barrel in the present invention.
Fig. 5 is the structural schematic diagram of the second lens barrel in the present invention.
Fig. 6 is the structural schematic diagram of focusing ring in the present invention.
Fig. 7 is diaphragm in the present invention, light modulation ring and the cooperation schematic diagram for cooperating cylinder.
Fig. 8 is the structural schematic diagram of the first lens group in the present invention.
Fig. 9 is the structural schematic diagram of the second lens group in the present invention.
Figure 10 is the structural schematic diagram of the third lens group in the present invention.
Figure 11 is the structural schematic diagram of the 4th lens group in the present invention.
In figure: 1- microscope base；The first guide groove of 11-；The second guide groove of 12-；2- focusing ring；21- sliding slot；22- focusing locking
Part；3- dims ring；31- dims locking member；4- cooperates cylinder；41- card slot；42- hollow-out parts；The first lens barrel of 5-；51- first is oriented to
Part；The second lens barrel of 6-；The second guide part of 61-；7- third lens barrel；8- diaphragm；81- release handle；The first lens group of A1-；A2- second
Lens group；A3- the third lens group；The 4th lens group of A4-.
Specific embodiment
It is attached below in conjunction with specific embodiment and specification to keep technical solution of the present invention and advantage clearer
Figure is described in further detail the present invention and its advantages, and embodiments of the present invention are not limited thereto.
As shown in Fig. 1 ~ 11, a kind of telecentric lens, including microscope base 1 and the focusing ring 2 being set in the middle part of microscope base 1；In microscope base 1
Portion along optical axis from object end to image side be successively arranged the first lens group A1, the second lens group A2, diaphragm 8, the third lens group A3 and
4th lens group A4；Second lens group A2 is arranged by the first lens barrel 5 in microscope base 1, and the third lens group A3 is set by third lens barrel 7
It sets in microscope base 1, the 4th lens group A4 is arranged by the second lens barrel 6 in microscope base 1；
First lens barrel 5 is equipped with the first guide part 51, and the second lens barrel 6 is equipped with the second guide part 61, and microscope base 1 is equipped with and the first guide part
51 corresponding first guide grooves 11, microscope base 1 are equipped with second guide groove 12 corresponding with the second guide part 61, set on the inside of focusing ring 2
There is sliding slot 21, the first guide part 51 passes through the first guide groove 11 and connect with sliding slot 21, and the second guide part 61 passes through the second guiding
Slot 12 is simultaneously connect with sliding slot 21；
Focusing ring 2 passes through turnover while driving the first guide part 51 and the second guide part 61, and the first guide part 51 is made to drive first
Lens barrel 5, the first lens barrel 5 move axially in microscope base 1 along the first guide groove 11, and the second guide part 61 is made to drive the second lens barrel
6, the second lens barrel 6 moves axially in microscope base 1 along the second guide groove 12.
The present embodiment has the beneficial effect that the first lens barrel 5 of the invention is equipped with the first guide part 51, the second lens barrel 6
Equipped with the second guide part 61, microscope base 1 is equipped with first guide groove 11 corresponding with the first guide part 51, and microscope base 1 is equipped with and leads with second
To corresponding second guide groove 12 of part 61, sliding slot 21 is equipped on the inside of focusing ring 2, the first guide part 51 passes through the first guide groove 11 simultaneously
It is connect with sliding slot 21, the second guide part 61 passes through the second guide groove 12 and connect with sliding slot 21；Focusing ring 2 is by turnover while driving
Dynamic first guide part 51 and the second guide part 61 make the first guide part 51 drive the first lens barrel 5, and the first lens barrel 5 is along the first guiding
Slot 11 moves axially in microscope base 1, and the second guide part 61 is made to drive the second lens barrel 6, and the second lens barrel 6 is along the second guide groove 12
It is moved axially in microscope base 1.Compared with the existing technology, the present invention makes the first lens barrel 5 and the second lens barrel 6 by rotating focusing ring 2
It is moved axially in microscope base 1, changes the standoff distance of each lens group, to realize the effect for adjusting the enlargement ratio of telecentric lens
Fruit.
Preferably, diaphragm 8 is equipped with the release handle 81 for adjusting 8 diameter of diaphragm, and telecentric lens further include being set in mirror
The light modulation ring 3 and cooperation cylinder 4 of image side one end of seat 1, cooperate one end of cylinder 4 to connect with release handle 81 by card slot 41, cooperate cylinder 4
The other end with light modulation ring 3 connect；It dims ring 3 to have enough to meet the need by turnover driving cooperation cylinder 4, makes to cooperate cylinder 4 that release handle 81 is driven to adjust
Save the diameter of diaphragm 8.By above-mentioned setting, the present invention, which can rotate light modulation ring 3, makes that cylinder 4 is cooperated to drive release handle 81 circumferential mobile
The diameter of diaphragm 8 is adjusted, to achieve the effect that control lens aperture.
Preferably, focusing ring 2 is equipped with focusing locking member 22, and focusing locking member 22 is for locking focusing ring 2, locking member of focusing
22 can be lock screw.By above-mentioned setting, the focusing locking focusing of locking member 22 is can be used after completing focusing in the present invention
Ring 2 avoids focusing ring 2 from loosening, and improves the observation precision of telecentric lens.
Preferably, light modulation ring 3 is equipped with light modulation locking member 31, and light modulation locking member 31 dims locking member for locking light modulation ring 3
31 can be lock screw.By above-mentioned setting, the light modulation locking light modulation of locking member 31 is can be used after completing light modulation in the present invention
Ring 3 avoids light modulation ring 3 from loosening, improves the observation precision of telecentric lens.
Preferably, the first guide groove 11 and the second guide groove 12 are the spiral guide slot along 1 week surface helix of microscope base.Pass through
Above-mentioned setting enables the first lens barrel 5 and the second lens barrel 6 moving in rotation in microscope base 1.
Preferably, cooperation cylinder 4 is equipped with hollow-out parts 42, and hollow-out parts 42 are used to pass through and move for the second guide part 61.Pass through
Above-mentioned setting enables that cylinder 4 is cooperated to be set in microscope base 1, and does not influence focusing ring 2 and focus.
Preferably, the first lens group A1 is positive power lens group, and the first lens group A1 is along optical axis from object end to image side
It successively include the first lens G1 with positive light coke, the second lens G2 with positive light coke, the third with positive light coke
Lens G3 and the 4th lens G4 with positive light coke；First lens G1 and the second lens G2 is successively glued to form the first gluing thoroughly
Mirror U1.According to the actual situation and requirement, suitable lens are selected.
Preferably, the second lens group A2 is negative-power lenses group, and the second lens group A2 is along optical axis from object end to image side
It successively include the 5th lens G5 with positive light coke, the 6th lens G6 with negative power and the with positive light coke the 7th
Lens G7；6th lens G6 and the 7th lens G7 is successively glued to form the second balsaming lens U2.It is wanted according to the actual situation with use
It asks, selects suitable lens.
Preferably, the third lens group A3 is positive power lens group, and the third lens group A3 is along optical axis from object end to image side
Successively include the 8th lens G8 with positive light coke, with the 9th lens of positive light coke, have the tenth lens G9 of positive light coke
With with the 11st lens G10 of negative power；8th lens G8 and the 9th lens G9 is successively glued to form third balsaming lens U3,
Tenth lens G10 and the 11st lens G11 is successively glued to form the 4th balsaming lens U4.According to the actual situation and requirement,
Select suitable lens.
Preferably, the 4th lens group A4 is positive power lens group, and the 4th lens group A4 is along optical axis from object end to image side
Successively include the 12nd lens G12 with positive light coke, with the 13rd lens G13 of positive light coke and there is positive light coke the
14 lens G14；13rd lens G13 and the 14th lens G14 is successively glued to form the 5th balsaming lens U5.According to practical feelings
Condition and requirement select suitable lens.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to above-mentioned specific embodiment, all those skilled in the art exist
Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of the present invention.This
Outside, although using some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (10)
1. a kind of telecentric lens, it is characterised in that: including microscope base (1) and the focusing ring (2) being set in the middle part of the microscope base (1)；
The microscope base (1) is internal to be successively arranged the first lens group (A1), the second lens group (A2), diaphragm from object end to image side along optical axis
(8), the third lens group (A3) and the 4th lens group (A4)；Second lens group (A2) is arranged by the first lens barrel (5) in institute
It states microscope base (1), the 4th lens group (A4) is arranged by the second lens barrel (6) in the microscope base (1)；
First lens barrel (5) is equipped with the first guide part (51), and second lens barrel (6) is equipped with the second guide part (61), described
Microscope base (1) is equipped with the first guide groove (11) corresponding with the first guide part (51), and the microscope base (1) is equipped with and described second
Corresponding second guide groove (12) of guide part (61), focusing ring (2) inside are equipped with sliding slot (21), first guide part
(51) it passes through first guide groove (11) and is connect with the sliding slot (21), second guide part (61) passes through described second
Guide groove (12) is simultaneously connect with the sliding slot (21)；
The focusing ring (2) makes described first to lead by turnover while driving the first guide part (51) and the second guide part (61)
First lens barrel (5) is driven to part (51), first lens barrel (5) is along first guide groove (11) in the microscope base (1)
Interior axial movement, and second guide part (61) is made to drive second lens barrel (6), second lens barrel (6) is along described
Second guide groove (12) axial movement in the microscope base (1).
2. telecentric lens according to claim 1, it is characterised in that: the diaphragm (8) is equipped with for adjusting the diaphragm
(8) release handle (81) of diameter, the telecentric lens further include the light modulation ring for being set in image side one end of the microscope base (1)
(3) it is connect with cooperation cylinder (4), one end of cooperation cylinder (4) with the release handle (81), the other end of cooperation cylinder (4)
It is connect with the light modulation ring (3)；The light modulation ring (3) drives cooperation cylinder (4) turnover by turnover, makes the cooperation cylinder
(4) release handle (81) is driven to adjust the diameter of the diaphragm (8).
3. telecentric lens according to claim 1, it is characterised in that: the focusing ring (2) is equipped with focusing locking member (22),
The focusing locking member (22) is for locking the focusing ring (2).
4. telecentric lens according to claim 2, it is characterised in that: the light modulation ring (3) is equipped with light modulation locking member (31),
The light modulation locking member (31) is for locking the light modulation ring (3).
5. telecentric lens according to claim 1, it is characterised in that: first guide groove (11) and second guiding
Slot (12) is the spiral guide slot along all surface helix of the microscope base (1).
6. telecentric lens according to claim 1, it is characterised in that: the cooperation cylinder (4) is equipped with hollow-out parts (42), described
Hollow-out parts (42) are used to pass through and move for second guide part (61).
7. telecentric lens according to claim 1, it is characterised in that: first lens group (A1) is positive power lens
Group, first lens group (A1) along optical axis from object end to image side successively include the first lens G1 with positive light coke, tool
There are the second lens G2, the third lens G3 with positive light coke and the 4th lens G4 with positive light coke of positive light coke；Institute
State the first lens G1 and the second lens G2 successively the first balsaming lens U1 of glued formation.
8. telecentric lens according to claim 1, it is characterised in that: second lens group (A2) is negative-power lenses
Group, second lens group (A2) along optical axis from object end to image side successively include the 5th lens G5 with positive light coke, tool
There are the 6th lens G6 of negative power and the 7th lens G7 with positive light coke；The 6th lens G6 and the 7th lens
G7 is successively glued to form the second balsaming lens U2.
9. telecentric lens according to claim 1, it is characterised in that: the third lens group (A3) is positive power lens
Group, the third lens group (A3) along optical axis from object end to image side successively include the 8th lens G8 with positive light coke, tool
There are the 9th lens of positive light coke, with the tenth lens G9 of positive light coke and with the 11st lens G10 of negative power；Described 8th
Lens G8 and the 9th lens G9 is successively glued to form third balsaming lens U3, the tenth lens G10 and the described 11st
Lens G11 is successively glued to form the 4th balsaming lens U4.
10. telecentric lens according to claim 1, it is characterised in that: the 4th lens group (A4) is that positive light coke is saturating
Microscope group, the 4th lens group (A4) from object end to image side successively include the 12nd lens with positive light coke along optical axis
G12, with the 13rd lens G13 of positive light coke and have the 14th lens G14 of positive light coke；The 13rd lens G13 and
The 14th lens G14 is successively glued to form the 5th balsaming lens U5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083964.XA CN109725409B (en) | 2019-01-29 | 2019-01-29 | Telecentric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083964.XA CN109725409B (en) | 2019-01-29 | 2019-01-29 | Telecentric lens |
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| Publication Number | Publication Date |
|---|---|
| CN109725409A true CN109725409A (en) | 2019-05-07 |
| CN109725409B CN109725409B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910083964.XA Active CN109725409B (en) | 2019-01-29 | 2019-01-29 | Telecentric lens |
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| Country | Link |
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| CN (1) | CN109725409B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034604A (en) * | 2020-09-08 | 2020-12-04 | 南京华群光电技术有限公司 | Telecentric lens suitable for industrial detection |
| CN113219639A (en) * | 2021-05-24 | 2021-08-06 | 深圳市视清科技有限公司 | Optical lens and image pickup apparatus |
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| JPH10142474A (en) * | 1996-11-06 | 1998-05-29 | Nikon Corp | Variable power optical system |
| JP2006208817A (en) * | 2005-01-28 | 2006-08-10 | Olympus Imaging Corp | Lens barrel for projector |
| CN106526805A (en) * | 2016-12-16 | 2017-03-22 | 福建福光天瞳光学有限公司 | F16mm high-definition low-distortion semi-group mobile industrial lens |
| CN107193117A (en) * | 2017-07-12 | 2017-09-22 | 福建福光股份有限公司 | compact high-resolution zoom lens |
| JP2018025578A (en) * | 2016-08-08 | 2018-02-15 | キヤノン株式会社 | Lens device |
| CN107976789A (en) * | 2017-12-27 | 2018-05-01 | 东莞市宇瞳光学科技股份有限公司 | A kind of big field angle machine visual lens |
| CN108732723A (en) * | 2018-08-07 | 2018-11-02 | 舜宇光学(中山)有限公司 | telecentric lens |
| CN209311775U (en) * | 2019-01-29 | 2019-08-27 | 广东奥普特科技股份有限公司 | A kind of telecentric lens |
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2019
- 2019-01-29 CN CN201910083964.XA patent/CN109725409B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10142474A (en) * | 1996-11-06 | 1998-05-29 | Nikon Corp | Variable power optical system |
| JP2006208817A (en) * | 2005-01-28 | 2006-08-10 | Olympus Imaging Corp | Lens barrel for projector |
| JP2018025578A (en) * | 2016-08-08 | 2018-02-15 | キヤノン株式会社 | Lens device |
| CN106526805A (en) * | 2016-12-16 | 2017-03-22 | 福建福光天瞳光学有限公司 | F16mm high-definition low-distortion semi-group mobile industrial lens |
| CN107193117A (en) * | 2017-07-12 | 2017-09-22 | 福建福光股份有限公司 | compact high-resolution zoom lens |
| CN107976789A (en) * | 2017-12-27 | 2018-05-01 | 东莞市宇瞳光学科技股份有限公司 | A kind of big field angle machine visual lens |
| CN108732723A (en) * | 2018-08-07 | 2018-11-02 | 舜宇光学(中山)有限公司 | telecentric lens |
| CN209311775U (en) * | 2019-01-29 | 2019-08-27 | 广东奥普特科技股份有限公司 | A kind of telecentric lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034604A (en) * | 2020-09-08 | 2020-12-04 | 南京华群光电技术有限公司 | Telecentric lens suitable for industrial detection |
| CN113219639A (en) * | 2021-05-24 | 2021-08-06 | 深圳市视清科技有限公司 | Optical lens and image pickup apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109725409B (en) | 2024-02-02 |
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