CN201637917U - Double-screw prime lens - Google Patents
Double-screw prime lens Download PDFInfo
- Publication number
- CN201637917U CN201637917U CN2010201008370U CN201020100837U CN201637917U CN 201637917 U CN201637917 U CN 201637917U CN 2010201008370 U CN2010201008370 U CN 2010201008370U CN 201020100837 U CN201020100837 U CN 201020100837U CN 201637917 U CN201637917 U CN 201637917U
- Authority
- CN
- China
- Prior art keywords
- lens barrel
- lens
- focusing
- tube
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Lens Barrels (AREA)
Abstract
The utility model discloses a double-screw prime lens which is provided with a lens tube and a flange tube for fixing the lens tube, wherein the lens tube is internally fixed with all optical elements, and the lens is provided with a focusing mechanism; the double-screw prime lens is characterized in that the focusing mechanism is provided with a focusing ring, the focusing ring and the lens tube are connected with each other by adopting a single-head left-hand thread fit mode, the focusing ring and the flange tube are connected with each other by adopting a three-head right-hand thread fit mode, the focusing ring are respectively connected with the flange tube and the lens tube by double threads, and the left-hand thread and the right-hand thread form a differential mechanism. Compared with the prior art, the double-screw prime lens has compact structure and fast focusing speed, reduces complex parts, simplifies the processing technique of the parts and the assembling technique of the lens, and reduces the cost greatly while meeting the using requirement.
Description
Technical field
The utility model belongs to the projection display technique field, is specifically related to a kind of focusing, position-limit mechanism that is used for fixed focus projection lens.
Background technology
Projection pattern just is divided into and throws in field of projection display, and three kinds of rear-projection and furred ceilings mostly adopt fixed focus projection lens in the back-projection system.Fixed focus projection lens regulative mode in the past adopts the spiral fluted mode to realize the focusing amount more, though this mode has satisfied the design objective requirement, spiral fluted processing relative complex is to the requirement height of machining equipment, assembly difficulty is big, so simple fixed focus projection lens cost is still higher.In addition, adopt this mode feel of focusing fine, but rear-projection only need once focusing in installation, and unlike the frequent use of front projection focusing function, so the design of this performance is superfluous relatively.For this reason, seek a kind of focusing scheme that not only satisfies rear-projection light engine focusing needs but also can well reduce cost.
The utility model content
For solving the above-mentioned defective that prior art exists, the purpose of this utility model provides a kind of brief two screw thread tight shots.Have compact conformation, focusing speed is fast, has reduced complex parts, has simplified parts machining process, the camera lens assembly technology, and cost is significantly reduced when satisfying request for utilization.
For achieving the above object, the technical solution adopted in the utility model is: this pair screw thread tight shot, flange tube with lens barrel and fixed lens barrel, the optical element that the lens barrel internal fixation is all, camera lens is provided with focus adjusting mechanism, it is characterized in that: described focus adjusting mechanism has focusing ring, adopt the single head left hand thread engagement to be connected between focusing ring and lens barrel, adopt three right-hand threads to be connected between focusing ring and flange tube, focusing ring is by two screw threads difference joint flange tubes and lens barrel, and left-hand thread (LHT) and right-hand thread constitute a differential attachment.
Be provided with the focusing position-limit mechanism between described lens barrel and flange tube, the focusing position-limit mechanism has two kidney slots that are positioned on the flange tube, and stop screw is connected on the lens barrel by kidney slot.
Also be provided with the trip bolt that accommodates to locking lens location after the optimum condition on the described flange tube.
Have two mating surfaces between described flange tube and the lens barrel, two mating surfaces are distributed in the interstage of lens barrel.
Adopt the beneficial effect of technique scheme to be: this fixed focus projection lens is realized focusing according to the mode that optical design requires to adopt whole group to move.At first adopt monocular tube to fix all optical elements, well guarantee the right alignment between the optical element, between flange and the lens barrel two mating surfaces have been arranged respectively simultaneously, be distributed in the interstage of lens barrel between two mating surfaces, camera lens is installed barycentre steadiness in back and the focusing process, and balance is good.
1. focusing ring is by two screw threads difference joint flanges and lens barrel, and left-hand thread (LHT) and right-hand thread constitute a differential attachment.The moving direction of rotation focusing ring lens barrel and flange is opposite, and after the projection lens flange was fixed, lens barrel was lens barrel amount of movement sums of the relative focusing ring with flange of amount of movement of focusing ring relatively together with the amount of movement of all optical elements, reaches the effect of quick focusing.
2. two stop screws of position-limit mechanism of focusing connect body tubes, whole mirror group are limited in two kidney slots of flange tube, and the processing of kidney slot is simple, and its length can accurately controlled whole group focusing amount.In addition, thread belt moving lens barrel translation vertically in the flange kidney slot in the focusing process, optical element does not rotate, avoided following in the projection focusing to produce the phenomenon of picture weave, the kidney slot of flange can accurately be controlled the focusing amount, accommodates to the position of tightening trip bolt locking camera lens after the optimum condition.
3. simple in structure, employing monocular tube structure has effectively guaranteed the position degree between the optical element; The focusing that is threaded has replaced helicla flute, reduces the part processing difficulty, reduces cost.
Description of drawings
Below in conjunction with accompanying drawing specific embodiment of the utility model is described in further detail.
Fig. 1 is a structural representation of the present utility model.
Wherein: 1. focus; 2. flange tube; 3. lens barrel; 4. nylon jacket; 5. stop screw; 6. trip bolt; 7. kidney slot; 8 first mating surfaces; 9, per two mating surfaces; 10 left-hand thread (LHT)s; 11 right-hand threads
Embodiment
Two screw thread tight shots as shown in Figure 1 have lens barrel 3, the optical element that the lens barrel internal fixation is all, flange tube 2 is sleeved on the outside of lens barrel 3, be used for fixing lens barrel 3, between flange tube 2 and lens barrel 3, have the interstage that two mating surfaces, 8,9, two mating surfaces are distributed in lens barrel 3.The front end of lens barrel is provided with focus adjusting mechanism, described focus adjusting mechanism has focusing ring 1,3 of focusing ring 1 and lens barrels adopt single head left-hand thread (LHT) 10 to be connected, 2 in focusing ring 1 and flange tube adopt three right-hand threads 11 to be connected, focusing ring 1 is by two screw threads difference joint flange tubes 2 and lens barrel 3, and left-hand thread (LHT) 10 and right-hand thread 11 constitute a differential attachment.Be provided with the focusing position-limit mechanism at lens barrel 3 and 2 in flange tube, the focusing position-limit mechanism has two kidney slots 7 that are positioned on the flange tube, stop screw 5 is connected on the lens barrel 3 by kidney slot, and the flange tube is provided with the trip bolt 6 that accommodates to locking lens location after the optimum condition.The focusing ring 1 that turns clockwise, lens barrel 3 relatively focusing ring 1 moves backward, and flange tube 2 is relative to focus and 1 moves forward, and the flange tube is fixed motionlessly in the use, and lens barrel also moves backward relative to the flange tube.Lens barrel 3 all optical elements of drive move in the focusing process, stop screw 5 is limited in the lens barrel group in the kidney slot of flange tube 2, rotatablely moving that focus this moment is converted to lens barrel moving horizontally in kidney slot vertically, the focusing amount of realization-0.75mm when the rear semicircle of nylon jacket 4 and kidney slot contacts.Otherwise, be rotated counterclockwise focusing ring, the focusing amount of lens barrel group level reach realization+0.75mm.Lens barrel is tightened trip bolt 6 lens barrels and is locked in the optimum position when certain some imaging is the most clear in moving, and back work distance is from effectively being compensated.
This focusing mode adopts two screw thread differential attachments can quick and precisely realize focusing, replaced relying on the structure that helicla flute is realized focusing, reduced the part processing difficulty, improved production efficiency, cost is effectively controlled, for the mass production of projection lens provides a kind of simple and direct feasible scheme.
Claims (4)
1. two screw thread tight shot, flange tube with lens barrel and fixed lens barrel, the optical element that the lens barrel internal fixation is all, camera lens is provided with focus adjusting mechanism, it is characterized in that: described focus adjusting mechanism has focusing ring, adopts the single head left hand thread engagement to be connected between focusing ring and lens barrel, and three right-hand threads of employing are connected between focusing ring and flange tube, focusing ring is by two screw threads difference joint flange tubes and lens barrel, and left-hand thread (LHT) and right-hand thread constitute a differential attachment.
2. according to claim 1 pair of screw thread tight shot is characterized in that: be provided with the focusing position-limit mechanism between described lens barrel and flange tube, the focusing position-limit mechanism has two kidney slots that are positioned on the flange tube, and stop screw is connected on the lens barrel by kidney slot.
3. according to claim 2 pair of screw thread tight shot is characterized in that: also be provided with the trip bolt that accommodates to locking lens location after the optimum condition on the described flange tube.
4. according to claim 3 pair of screw thread tight shot is characterized in that: have two mating surfaces between described flange tube and the lens barrel, two mating surfaces are distributed in the interstage of lens barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201008370U CN201637917U (en) | 2010-01-25 | 2010-01-25 | Double-screw prime lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201008370U CN201637917U (en) | 2010-01-25 | 2010-01-25 | Double-screw prime lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637917U true CN201637917U (en) | 2010-11-17 |
Family
ID=43082421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201008370U Expired - Lifetime CN201637917U (en) | 2010-01-25 | 2010-01-25 | Double-screw prime lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637917U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364932A (en) * | 2013-08-02 | 2013-10-23 | 福建福光数码科技有限公司 | Medium-wave infrared refrigerated lens with long focal length and large aperture |
| CN105700273A (en) * | 2015-12-09 | 2016-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Camera focus control device for ultra-high speed sequence laser shadow imaging |
| CN106094157A (en) * | 2016-08-09 | 2016-11-09 | 成都市极米科技有限公司 | A kind of Zoom regulating mechanism and projector |
| CN107153268A (en) * | 2017-07-10 | 2017-09-12 | 南阳市百施特光电有限公司 | A kind of Head-telescope |
| WO2019213812A1 (en) * | 2018-05-07 | 2019-11-14 | 深圳市伯森光电科技有限公司 | Image capture device |
| US11140303B2 (en) | 2018-05-07 | 2021-10-05 | Bosen Opto-Electronic Technology Co. Limited | Camera |
| US20220341707A1 (en) * | 2021-04-23 | 2022-10-27 | Leupold & Stevens, Inc. | Diopter adjustment for optical device with overlapping left-handed and right-handed threads |
-
2010
- 2010-01-25 CN CN2010201008370U patent/CN201637917U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364932A (en) * | 2013-08-02 | 2013-10-23 | 福建福光数码科技有限公司 | Medium-wave infrared refrigerated lens with long focal length and large aperture |
| CN105700273A (en) * | 2015-12-09 | 2016-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Camera focus control device for ultra-high speed sequence laser shadow imaging |
| CN105700273B (en) * | 2015-12-09 | 2018-05-29 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of ultrahigh speed sequence laser shadowgraph imaging Focalizing arrangement for camera |
| CN106094157A (en) * | 2016-08-09 | 2016-11-09 | 成都市极米科技有限公司 | A kind of Zoom regulating mechanism and projector |
| CN107153268A (en) * | 2017-07-10 | 2017-09-12 | 南阳市百施特光电有限公司 | A kind of Head-telescope |
| CN107153268B (en) * | 2017-07-10 | 2023-08-25 | 南阳市百施特光电有限公司 | Head-wearing telescope |
| WO2019213812A1 (en) * | 2018-05-07 | 2019-11-14 | 深圳市伯森光电科技有限公司 | Image capture device |
| US11140303B2 (en) | 2018-05-07 | 2021-10-05 | Bosen Opto-Electronic Technology Co. Limited | Camera |
| US20220341707A1 (en) * | 2021-04-23 | 2022-10-27 | Leupold & Stevens, Inc. | Diopter adjustment for optical device with overlapping left-handed and right-handed threads |
| US11493304B1 (en) * | 2021-04-23 | 2022-11-08 | Leupold & Stevens, Inc. | Diopter adjustment for optical device with overlapping left-handed and right-handed threads |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201637917U (en) | Double-screw prime lens | |
| CN210572965U (en) | Infrared laser light filling camera lens device | |
| CN104459957A (en) | Refrigeration type medium wave infrared light and laser double-mode common-caliber camera lens | |
| CN108873232A (en) | Manual zoom regulating mechanism and manual zoom camera lens | |
| CN108873231B (en) | Lens focusing device | |
| CN210625481U (en) | Parallax correction mechanism | |
| CN110822991A (en) | Sighting telescope for high zoom gun | |
| WO2007000083A1 (en) | A power focusing device for sight | |
| CN202486394U (en) | Adjusting mechanism of zooming projection lens | |
| CN217739585U (en) | Multi-head thread focusing structure of lens | |
| CN108844405B (en) | Laser adjusting mechanism for laser sighting device | |
| CN206002747U (en) | A kind of high accuracy optical path adjusting mechanism | |
| CN114185147A (en) | Zoom lens structure capable of guaranteeing consistency of optical axes | |
| CN204287588U (en) | Refrigeration mode medium-wave infrared and laser bimodulus Shared aperture camera lens | |
| CN220603820U (en) | Lens cone assembly | |
| CN211014795U (en) | Focusing structure | |
| CN201096972Y (en) | Novel objective focus arming lens | |
| CN208737076U (en) | Manual zoom regulating mechanism and manual zoom camera lens | |
| CN214222993U (en) | Combined lens capable of adjusting light spot size | |
| CN216927229U (en) | Zoom lens structure capable of guaranteeing consistency of optical axes | |
| CN203299502U (en) | Back focal length adjusting mechanism assembly for camera | |
| CN112212741A (en) | Parallax correction mechanism | |
| CN208060831U (en) | A kind of telescope adjustment screw rod | |
| CN201886254U (en) | Rear lens focus adjusting device | |
| CN220305545U (en) | Optical element angle adjusting mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190806 Address after: 473000 No. 366 Xinchen West Road, Nanyang High-tech Zone, Henan Province Patentee after: Nanyang Lida Photoelectric Co., Ltd. Address before: 473003 No. 508 Industrial Road, Nanyang City, Henan Province Patentee before: Lida Optical and Electronic Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |
|
| CX01 | Expiry of patent term |