CN105700154A - Imaging lens for typoscope - Google Patents
Imaging lens for typoscope Download PDFInfo
- Publication number
- CN105700154A CN105700154A CN201610172387.8A CN201610172387A CN105700154A CN 105700154 A CN105700154 A CN 105700154A CN 201610172387 A CN201610172387 A CN 201610172387A CN 105700154 A CN105700154 A CN 105700154A
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- lens barrel
- zoom
- group
- focus
- lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/021—Reading apparatus
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
Disclosed in the invention is an imaging lens for a typoscope. The imaging lens is composed of a zoom lens cone, a lens cone, a zoom ring, a hold-down ring, a first zoom lens group and a second zoom lens group. The lens cone sleeves the outside of the zoom lens cone; the zoom ring sleeves the outside of the lens cone; the first zoom lens group is arranged inside the zoom lens cone; and the second zoom lens group is arranged at the bottom opening of the lens cone. A pin rod is arranged on the zoom lens cone; a guide slot is formed in the lens cone wall at the axial direction; a trapezoid thread is arranged at the inner wall of the zoom ring; and one end of the pin rod passes through the guide slot and extends into a threaded tooth groove of the trapezoid thread. The provided imaging lens has advantages of simple adjusting way, stable movement, low processing difficulty, simple assembly process, and high precision.
Description
Technical field
The present invention relates to aid reading field, particularly to a kind of visual acuity aid imaging lens。
Background technology
Visual acuity aid is to aid in the aid that visually impaired people's (including personage with visual disabilities and old man etc.) carries out reading。At present, the technology that visual acuity aid adopts is based on special-purpose imageprocessor, gathers the view data of digital micromirror head mould group shooting, and view data is processed by Applied Digital image processing techniques, then the image after process is shown in lcd screen in real time and reads for user。
Wherein visual acuity aid imaging lens is as the input module of optical signalling, and the impact being ultimately imaged quality is very big by it, and iff adopting tradition pick-up lens to substitute, not only processing cost is high, and assembly technology is complicated。
Summary of the invention
It is low that the technical problem to be solved is to provide a kind of difficulty of processing, and processing technique is simple, the visual acuity aid imaging lens that precision is higher。
For solving the problems referred to above, the present invention provides a kind of visual acuity aid imaging lens, including Zoom lens barrel, lens barrel, zoom ring, hold-down ring, the first focus-variable lens group and the second focus-variable lens group；Lens barrel is set in outside Zoom lens barrel, and zoom ring is set in outside lens barrel, and the first focus-variable lens group is arranged in Zoom lens barrel, and the second focus-variable lens group is arranged on the bottom opening place of lens barrel；
Zoom lens barrel is provided with pin rod, lens barrel wall axially offers guide groove, the inwall of zoom ring is provided with trapezoidal thread；One end of pin rod is stretched into through guide groove in the screw thread alveolus of trapezoidal thread。
Preferably, being provided with spring between the first focus-variable lens group and the second focus-variable lens group, spring is in compressive state。
Preferably, also including annular fixing frame, annular fixing frame is arranged between Zoom lens barrel and lens barrel, circumferentially spaced on annular fixing frame is provided with 3-10 group hole, is provided with the first steel ball group in hole；The diameter of the first steel ball group is more than the thickness of annular fixing frame, equal to the outer wall of Zoom lens barrel to the distance of the inwall of lens barrel。
Preferably, annular fixing frame being along the circumferential direction arranged at intervals with 3 groups of holes with 120 °, often group hole includes two holes axially。
Preferably, hold-down ring is also included；The bottom of lens barrel is to being outside equipped with the first crossette, and to being outside equipped with the second crossette bottom zoom ring, hold-down ring top is inwardly provided with the 3rd crossette；Second crossette upper surface is provided with annular groove, is provided with the second steel ball group in annular groove；The diameter of the second steel ball group is equal to the well width of annular groove, more than the groove depth of annular groove；Second crossette is pressed on the first crossette；Hold-down ring is set in outside the first crossette and the second crossette, and the 3rd crossette is pressed in the second steel ball group。
Preferably, the steel ball of the second steel ball group is filled out and is filled with annular groove。
Preferably, the bottom of lens barrel is inwardly provided with first shoulder, and the bottom of Zoom lens barrel is inwardly provided with the second shoulder；First focus-variable lens group is arranged on the second shoulder, the first trim ring of the top edge being arranged on the first focus-variable lens group fix；Second focus-variable lens group is arranged in first shoulder, the second trim ring of the top edge being arranged on the second focus-variable lens group fix。
Preferably, the upper opening place of Zoom lens barrel is provided with sealing member。
Preferably, the tooth of trapezoidal thread from half identical with the diameter of pin rod。
Preferably, the internal diameter of guide groove and the external diameter of pin rod are identical；First focus-variable lens group and the second same primary optical axis of focus-variable lens group。
There is advantages that
Zoom lens barrel by pin rod, guide groove, screw thread cooperation realize moving axially, regulative mode is simple, mobile does not steadily rotate, it is prevented that the eyeglass rotation impact on imaging。
By the first steel ball group centering between Zoom lens barrel and lens barrel, concentricity is high, slides smooth and easy。
Spring can offset the gravity of Zoom lens barrel, and makes pin rod and zoom ring compact siro spinning technology, eliminates structure interval, makes the first focus-variable lens group and the second focus-variable lens group airspace size accurate。
The tight gapless of the contact between zoom ring and lens barrel is made so that the first focus-variable lens group and the second focus-variable lens group registration by hold-down ring。
The visual acuity aid imaging lens difficulty of processing of the present invention is low, and assembly technology is simple, and precision is high。
Accompanying drawing explanation
Fig. 1 is the external side view of visual acuity aid imaging lens。
Fig. 2 is the profile sectioned along Fig. 1 " A-A " line。
Fig. 3 is the three-dimensional structure diagram of lens barrel。
Fig. 4 is lens barrel cut-away view。
Fig. 5 is Zoom lens barrel and fixed mount top view。
Detailed description of the invention
Visual acuity aid imaging lens in the present invention, wherein the top of Zoom lens barrel and lens barrel refers to that the upper opening of the side towards subject, Zoom lens barrel and lens barrel refers to the opening towards subject；The bottom of Zoom lens barrel and lens barrel refers to that the bottom opening of the side away from subject, Zoom lens barrel and lens barrel refers to the side opening away from subject。
Zoom principle: realize by regulating the relative position of the first focus-variable lens group and the second focus-variable lens group。
Below in conjunction with accompanying drawing, the present invention is further illustrated。
As illustrated in fig. 1 and 2, the visual acuity aid imaging lens of the present invention includes Zoom lens barrel 1, lens barrel 2, zoom ring 3, hold-down ring the 4, first focus-variable lens group the 5, second focus-variable lens group 6, annular fixing frame 7, spring 8。First focus-variable lens group 5 is installed on the second shoulder 104 of Zoom lens barrel 1 bottom opening, and is compressed by the first trim ring 102, and the first focus-variable lens group is by one piece of concave lens and one piece of convex lens combination, and the upper opening of Zoom lens barrel 1 is sealed by the first sealing member 103。Second focus-variable lens group 6 is installed in the first shoulder 204 of lens barrel 2 bottom opening, and is compressed by the second trim ring 203, it will be understood by those skilled in the art that the second focus-variable lens group 6 can be the combination of multiple focus-variable lens。It is internal that Zoom lens barrel 1 is set in lens barrel 2, there is bottom zoom ring 3 outwards vertical the second prominent crossette 304, there is bottom lens barrel 2 outwards vertical the first prominent crossette 205, zoom ring 3 is set in outside lens barrel 2, and first the upper surface of crossette 205 be close to the lower surface of the second crossette 304, the upper surface of the second crossette 304 is clamped ring 4 and covers clamping place and be provided with annular groove 302, annular groove 302 is filled full second steel ball group 303, each steel ball size forming the second steel ball group 303 is identical, the diameter of steel ball is identical with the width of annular groove 302, but the height slightly larger than annular groove 302。Hold-down ring 4 is set in outside zoom ring 3 and lens barrel 2, and hold-down ring 4 is provided with the 3rd crossette 401, and the 3rd crossette 401 is by compressing the second steel ball group 303 being positioned on annular groove 302, so that the first crossette 205 and the second crossette 304 are in close contact。First focus-variable lens group 5 is consistent with the axle center of lens barrel 2, Zoom lens barrel 1, zoom ring 3 and hold-down ring 4 with the optical axis of the second focus-variable lens group 6。
As shown in Figures 2 and 3, Zoom lens barrel 1 is fixed with pin rod 101, pin rod 101 traverse is arranged on the guide groove 201 on lens barrel 2, and embed in the trapezoidal thread 301 being arranged on zoom ring 3 inwall, thus Zoom lens barrel 1 and zoom ring 3 form threaded engagement, guide groove 201 is vertically offered vertically, and the internal diameter of guide groove 201 is identical with the external diameter of pin rod 101, when rotating zoom ring 3, pin rod 101 can move along guide groove 201 and drive Zoom lens barrel 1 to move axially。Being provided with spring 8 between bottom lens barrel 2 and bottom Zoom lens barrel 1, spring 8 moves axially at Zoom lens barrel 1 and is in compressive state in process all the time, thus promoting Zoom lens barrel 1 upwards pretension, and eliminates the gap between pin rod 101 and trapezoidal thread 301。
As shown in Fig. 2, Fig. 4 and Fig. 5, annular fixing frame 7 it is provided with between Zoom lens barrel 1 and lens barrel 2, annular fixing frame 7 is installed on Zoom lens barrel 1, annular fixing frame 7 is provided with 3 groups and circumferentially becomes 120 ° of spaced holes 702, often group hole has 2 holes axially configured up and down, being provided with the first steel ball group 701 in hole 702, the diameter of the first steel ball group 701 is all identical and thickness slightly larger than annular fixing frame 7, and spacing equal to Zoom lens barrel 1 and lens barrel 2。
In use, rotating zoom ring 3, due to the cooperation between pin rod 101 and trapezoidal thread 301, pin rod 101 can slide up and down in trapezoidal thread 301, and drives Zoom lens barrel 1 to slide up and down in lens barrel 2。Adopt trapezoidal thread 301 have the advantage that: the tooth of trapezoidal thread 301 from half identical with the diameter of pin rod 101, and trapezoidal thread 301 has with pin rod 101 and longer contacts line length, easily reduce the frictional resistance between pin rod 101 and zoom ring 3, thus improving transmission efficiency, trapezoidal thread 301 has deeper tooth, thus easily storing lubricant grease in tooth, trapezoidal thread 301 transverse tooth thickness is wider, comparatively wear-resisting, and bigger load can be born。And due to the axially arranged guide groove on pin rod 101 traverse lens barrel 2, and the internal diameter of guide groove 201 is identical with the external diameter of pin rod 101, pin rod 101 slides axially only along guide groove 201, the position-limiting action of guide groove 201 avoids the Zoom lens barrel 1 of pin rod 101 and pin rod 101 drive and rotates, even if therefore in the first focus-variable lens group 5, the machining accuracy of each point of distance optical axis same distance is different, the impact of imaging is also less, thus the requirement of the machining accuracy of the first focus-variable lens group 5 is reduced。
Hold-down ring 4 is when zoom ring 3 rotates, by compressing the second steel ball group 303 in the annular groove 302 being arranged on zoom ring 3 second crossette 304, make zoom ring 3 while smooth rotation, second crossette 304 of zoom ring 3 and the first crossette 205 of lens barrel 2 can be in close contact, thus the distance ensured between the first focus-variable lens group 5 and the second focus-variable lens group 6 is accurate。
It is arranged on the first steel ball group 701 on annular fixing frame 7, make Zoom lens barrel 1 can slide smooth and easy along the inwall of lens barrel 2, by circumferentially feeling relieved in 120 ° of spaced first steel ball groups 701 between Zoom lens barrel 1 and lens barrel 2, improve and further ensure the concentricity between Zoom lens barrel 1 and lens barrel 2；Stop the rotation zoom ring 3, is arranged on bottom Zoom lens barrel 1 and spring 8 between bottom lens barrel 2 is in compressive state, and therefore spring 8 promotes Zoom lens barrel 1 upwards pretension, thus the distance accurately adjusted between the first focus-variable lens group 5 and the second focus-variable lens group 6。
The visual acuity aid imaging lens difficulty of processing of the present invention is low: the lens barrel 2 inwall face of cylinder is concentric with the bottom opening face of cylinder coaxial, can on the lathe that spindle rotation accuracy is higher once dress add cutting and form, axiality is ensured by lathe, it is to avoid repeatedly clamping regulation of mental activities and the various errors brought on different devices。The in like manner perpendicularity of lens barrel 2 bottom opening and first shoulder 204, the inwall face of cylinder of Zoom lens barrel 1 and the axiality on the outer wall face of cylinder, the inwall face of cylinder of Zoom lens barrel 1 and the perpendicularity of the second shoulder 104, all only need to once cut on lathe and form, and by lathe accuracy guarantee。
The visual acuity aid imaging lens assembly technology of the present invention is simple: Zoom lens barrel 1 and lens barrel 2 by being that the first steel ball group 701 of 120 ° of circle distribution is felt relieved on annular fixing frame 7, without regulating after this centering assembling。Pin rod 101 with zoom ring 3 contact gap owing to the elastic force effect oneself of spring eliminates, it is not necessary to repair。Gap between lens barrel 2 and zoom ring 3 compresses elimination by screwing hold-down ring 4, therefore without to hold-down ring 4 Precision Machining。
The visual acuity aid imaging lens precision of the present invention is high: the precision between the first focus-variable lens group 5 and the second focus-variable lens group 6 is transmitted by lens barrel the 2, first steel ball group 701, Zoom lens barrel 1, and lens barrel the 2, first steel ball group 701, Zoom lens barrel 1 good processing accuracy, transitive relation progression is few, first steel ball group 701 is spaced apart in 120 ° on annular fixing frame 7 circumference, make Zoom lens barrel 1 and lens barrel 2 good concentricity, gap between pin rod 101 and zoom ring 3 is eliminated by spring 8 pretension, is absent from backhaul gap。Gap between lens barrel 2 and zoom ring 3 is compressed by hold-down ring 4 and the second steel ball group 303 and eliminates。These configurations ensure that the higher positioning precision of visual acuity aid imaging lens of the present invention。
The preferred embodiment of the present invention described in detail above。Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work。Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment。
Claims (10)
1. a visual acuity aid imaging lens, it is characterised in that include Zoom lens barrel, lens barrel, zoom ring, hold-down ring, the first focus-variable lens group and the second focus-variable lens group；Described lens barrel is set in outside described Zoom lens barrel, and described zoom ring is set in outside described lens barrel, and described first focus-variable lens group is arranged in described Zoom lens barrel, and described second focus-variable lens group is arranged on the bottom opening place of described lens barrel；
Described Zoom lens barrel is provided with pin rod, described lens barrel wall axially offers guide groove, the inwall of described zoom ring is provided with trapezoidal thread；One end of described pin rod is stretched into through described guide groove in the screw thread alveolus of described trapezoidal thread。
2. visual acuity aid imaging lens as claimed in claim 1, it is characterised in that being provided with spring between described first focus-variable lens group and described second focus-variable lens group, described spring is in compressive state。
3. visual acuity aid imaging lens as claimed in claim 1, it is characterized in that, also including annular fixing frame, described annular fixing frame is arranged between described Zoom lens barrel and described lens barrel, circumferentially spaced on described annular fixing frame it is provided with 3-10 group hole, in described hole, is provided with the first steel ball group；The diameter of described first steel ball group is more than the thickness of described annular fixing frame, equal to the outer wall of the described Zoom lens barrel distance to the inwall of described lens barrel。
4. visual acuity aid imaging lens as claimed in claim 3, it is characterised in that be along the circumferential direction arranged at intervals with 3 groups of holes with 120 ° on described annular fixing frame, often group hole includes two holes axially。
5. visual acuity aid imaging lens as claimed in claim 1, it is characterised in that also include hold-down ring；The bottom of described lens barrel is to being outside equipped with the first crossette, and to being outside equipped with the second crossette bottom described zoom ring, described hold-down ring top is inwardly provided with the 3rd crossette；Described second crossette upper surface is provided with annular groove, is provided with the second steel ball group in described annular groove；The diameter of described second steel ball group is equal to the well width of described annular groove, more than the groove depth of described annular groove；Described second crossette is pressed on described first crossette；Described hold-down ring is set in outside described first crossette and described second crossette, and described 3rd crossette is pressed in described second steel ball group。
6. visual acuity aid imaging lens as claimed in claim 5, it is characterised in that the steel ball of described second steel ball group is filled out and is filled with described annular groove。
7. visual acuity aid imaging lens as claimed in claim 1, it is characterised in that the bottom of described lens barrel is inwardly provided with first shoulder, and the bottom of described Zoom lens barrel is inwardly provided with the second shoulder；Described first focus-variable lens group is arranged on described second shoulder, the first trim ring of the top edge being arranged on described first focus-variable lens group fix；Described second focus-variable lens group is arranged in described first shoulder, the second trim ring of the top edge being arranged on described second focus-variable lens group fix。
8. visual acuity aid imaging lens as claimed in claim 1, it is characterised in that the upper opening place of described Zoom lens barrel is provided with sealing member。
9. visual acuity aid imaging lens as claimed in claim 1, it is characterised in that the tooth of described trapezoidal thread from half identical with the diameter of described pin rod。
10. the visual acuity aid imaging lens as described in any one of claim 1-9, it is characterised in that the internal diameter of described guide groove is identical with the external diameter of described pin rod；Described first focus-variable lens group and the described second same primary optical axis of focus-variable lens group。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172387.8A CN105700154B (en) | 2016-03-23 | 2016-03-23 | A kind of typoscope imaging lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172387.8A CN105700154B (en) | 2016-03-23 | 2016-03-23 | A kind of typoscope imaging lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105700154A true CN105700154A (en) | 2016-06-22 |
| CN105700154B CN105700154B (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610172387.8A Active CN105700154B (en) | 2016-03-23 | 2016-03-23 | A kind of typoscope imaging lens |
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| Country | Link |
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| CN (1) | CN105700154B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772900A (en) * | 2016-12-21 | 2017-05-31 | 武汉华工激光工程有限责任公司 | Optics adjusting part and mechanical-optical setup |
| CN107819989A (en) * | 2017-11-14 | 2018-03-20 | 安徽森力汽车电子有限公司 | A kind of assembling structure of camera and housing |
| CN108873231A (en) * | 2018-08-28 | 2018-11-23 | 厦门力鼎光电股份有限公司 | A kind of lens focusing device |
| CN109590844A (en) * | 2019-01-22 | 2019-04-09 | 宁波舜宇红外技术有限公司 | Optical structure element automatic grinding equipment |
| US20210223502A1 (en) * | 2020-01-22 | 2021-07-22 | Canon Kabushiki Kaisha | Lens apparatus and image pickup apparatus |
| CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772900A (en) * | 2016-12-21 | 2017-05-31 | 武汉华工激光工程有限责任公司 | Optics adjusting part and mechanical-optical setup |
| CN107819989A (en) * | 2017-11-14 | 2018-03-20 | 安徽森力汽车电子有限公司 | A kind of assembling structure of camera and housing |
| CN108873231A (en) * | 2018-08-28 | 2018-11-23 | 厦门力鼎光电股份有限公司 | A kind of lens focusing device |
| CN108873231B (en) * | 2018-08-28 | 2023-10-24 | 厦门力鼎光电股份有限公司 | Lens focusing device |
| CN109590844A (en) * | 2019-01-22 | 2019-04-09 | 宁波舜宇红外技术有限公司 | Optical structure element automatic grinding equipment |
| US20210223502A1 (en) * | 2020-01-22 | 2021-07-22 | Canon Kabushiki Kaisha | Lens apparatus and image pickup apparatus |
| US11586003B2 (en) * | 2020-01-22 | 2023-02-21 | Canon Kabushiki Kaisha | Lens apparatus and image pickup apparatus |
| CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
| CN114217406B (en) * | 2021-11-30 | 2024-02-09 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
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|---|---|
| CN105700154B (en) | 2018-03-27 |
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Effective date of registration: 20190924 Address after: 325027 No. 270 College West Road, Zhejiang, Wenzhou Patentee after: THE EYE HOSPITAL OF WENZHOU MEDICAL UNIVERSITY Address before: Zhou Yu Tian Industrial District of Longwan District of Wenzhou City, Zhejiang province 325011 Patentee before: ZHEJIANG EAST OPTICAL TECHNOLOGY CO., LTD. |
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