CN203275753U - Optical system having small volume and large zoom ratio - Google Patents
Optical system having small volume and large zoom ratio Download PDFInfo
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- CN203275753U CN203275753U CN 201320273026 CN201320273026U CN203275753U CN 203275753 U CN203275753 U CN 203275753U CN 201320273026 CN201320273026 CN 201320273026 CN 201320273026 U CN201320273026 U CN 201320273026U CN 203275753 U CN203275753 U CN 203275753U
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Abstract
The utility model relates to an optical system having a small volume and a large zoom ratio. A first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group are arranged orderly between a shot object and an image surface. The first lens group is fixed relative to the image surface, the second lens group can be moved front and back along the object-image direction relative to the image surface, and the third lens group is fixed relative to the image surface. The focal length of the first lens group is positive, and the focal length of the second lens group is negative. The optical system having the small volume and the large zoom ratio of the utility model solves the problems of long focusing distance, small focusing range, relative low resolution, small zoom ratio, large volume, etc.
Description
[technical field]
The utility model relates to a kind of optical system, relate in particular to a kind ofly be applied to monitor, the high pixel of exhibition booth system, microspur focusing, large multiplying power varifocal optical system.
[background technology]
The such shortcoming of variable focal length optical system ubiquity of monitor at present, the exhibition booth being used: system's focal length multiplying power is low, resolution is on the low side, can realize when whole process only has certain multiplying power from the low power to the high power that microspur focusing or focusing range are little, volume is large, distorts large etc.
Also do not have in the market camera lens can overcome simultaneously above-mentioned shortcoming, only have the minority camera lens, improve certain aspect in the situation that sacrifice other side, such as in order to realize large focal variation ratio, must increase system bulk.For realize nearer focusing from, must reduce resolution, the complexity of increase system etc., can not satisfy image definition that monitoring, exhibition booth require and authenticity far away, from the low power to the high power whole process implementation from microspur to the infinite distance scope in focusing, volume little etc., also do not overcome in the market the zoom lens of above whole shortcomings.
[utility model content]
The utility model purpose is that to overcome prior art whole process focusing distance, focusing range from the low power to the high power little, and resolution is on the low side, and zoom ratio is little, and volume is large to be waited not enoughly, and the optical system of the little large multiplying power zoom of a kind of volume is provided.
In order to solve the technical matters of above-mentioned existence, the utility model adopts following technical proposal:
The optical system of the little large multiplying power zoom of a kind of volume, it is characterized in that: be provided with successively first lens group, the second lens combination, the 3rd lens combination and the 4th lens combination and the 5th lens combination between 18 from the subject to image planes, described first lens group maintains static with respect to image planes 18, the second lens combination can be along the forward and backward movement of image direction with respect to image planes 18, the 3rd lens combination maintains static with respect to image planes 18, the focal length of described first lens group is for just, and the focal length of the second lens combination is for negative.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: described first lens group is comprised of first lens 1, the second lens 2, the 3rd lens 3; Described the second lens combination is comprised of the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7; Described the 3rd lens combination is comprised of the 8th lens 9, the 9th lens 10; Described the 4th lens combination is comprised of the tenth lens 11, the 11 lens 12, the 12 lens 13, the 13 lens 14; Described the 5th lens combination is comprised of the 14 lens 15, the 15 lens 16.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: described the 4th lens combination, the 5th lens combination can be along the forward and backward movements of image direction with respect to image planes 18.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: described first lens 1 and the second lens 2 use optical glue to be bonded together; The 6th lens 6 and the 7th lens 7 use optical glue to be bonded together; The 8th lens 9 and the 9th lens 10 use optical glue to be bonded together; The 12 lens 13 and the 13 lens 14 use optical glue to be bonded together; The 14 lens 15 and the 15 lens 16 use optical glue to be bonded together.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: the focal power of described the 3rd lens combination is being for just, and the focal power of the 4th lens combination is being for just, and the focal power of the 5th lens combination is for just.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: in described varifocal optical system, all lens are spherical lens and material is optical glass.
The optical system of the little large multiplying power zoom of a kind of volume as above is characterized in that: be provided with diaphragm 8 between the 7th lens 7 and the 8th lens 9, be provided with optical filter 17 between the 15 lens 16 and image planes 18.
The utility model compared with prior art has advantages of as follows:
1, the little focal variation ratio of most of zoom lens's volume is also little in the market, and focal length multiplying power large volume also and then increases, and when focal length multiplying power of the present utility model is large, volume is little;
2, the common zoom lens near distance of usually focusing under the low power state in the market, but the distance of focusing under the high power state, focusing range is little, in close-range photography, usually show the defectives such as subject has distortion or image field is not straight, the utility model can be realized in whole process focusing in the scope of infinite distance from microspur from the low power to the high power, can take the feature of small items in very near distance, has the characteristic of micro-lens;
3, most of large multiplying power zoom lens's pixel is on the low side in the market, be usually expressed as under the high power state resolution low, perhaps center resolution is high, periphery is low, resolution of the present utility model is very high, and the whole process from the low power to the high power can both photograph that whole picture is clear, the image of high-contrast;
4, the distortion under zoom lens's low power state of large multiplying power is very large in the market, distortion under the utility model low power state is very little, be in the market the zoom lens under same size 1/4, in shooting process, almost can't see object has distortion.
[description of drawings]
Fig. 1 is system optics figure of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
As shown in the figure, the optical system of the little large multiplying power zoom of a kind of volume is characterized in that: 18 are provided with first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, diaphragm 8, the 8th lens 9, the 9th lens 10, the tenth lens 11, the 11 lens 12, the 12 lens 13, the 13 lens 14, the 14 lens 15, the 15 lens 16 and optical filter 17 successively from the subject to image planes.
Described first lens 1, the second lens 2, the 3rd lens 3 are the first lens group, and the focal length of whole lens combination is for just and with respect to sensitive chip maintaining static.The 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 are the second lens combination, and the focal length of whole lens combination is for bearing and can moving forward and backward along the image direction with respect to sensitive chip.The 8th lens 9, the 9th lens 10 are the 3rd lens combination, and the focal length of whole lens combination is for just and with respect to sensitive chip maintaining static.The tenth lens 11, the 11 lens 12, the 12 lens 13, the 13 lens 14 are the 4th lens combination, and the focal length of whole lens combination is for just and with respect to sensitive chip moving forward and backward along the image direction.Described the 14 lens 15, the 15 lens 16 are the 5th lens combination, and the focal length of whole lens combination is for just and with respect to sensitive chip moving forward and backward along the image direction.
In order to realize larger zoom ratio, adopt first lens group and the 3rd lens combination to fix during design, the second lens combination can move along the image direction between first lens group and the 3rd lens combination, leave larger space between first lens group and the 3rd lens combination, make the second lens combination larger to high power state amount of movement from the low power state.Simultaneously, the focal length of first lens group is for just, and the focal length of the second lens combination guarantees can both enter the back lens combination no matter be wide-angle or bigbore light incident for negative, realizes larger zoom ratio.
In order to realize high resolving power, design adopts the second lens combination, the 4th lens combination, the 5th lens combination to move, the 3rd lens combination is fixed, the change amount of the conjugate distance that the conjugate distance change amount of such the second lens combination causes with the 4th lens combination, the 5th lens combination after the 3rd lens combination is vertically amplified offsets, and realizes the image planes compensation.
The first lens group adopts balsaming lens and simple lens to be used in conjunction with, and cemented surface bends towards diaphragm 8, not only makes the first auxiliary light that good trend is arranged, but also can correct the spherical aberration of high power position and sinusoidal poor.The second lens combination adopts two simple lenses and balsaming lens to coordinate, and has well corrected the aberration of low power position.The 5th lens combination adopts single balsaming lens and removable, the residual aberration of front lens combination when correcting different multiplying.
The whole system many places adopt simple lens and balsaming lens to be used in conjunction with, and have not only eliminated the aberration of whole system, also well balance the aberration of whole system.At last, certain vignetting is set, in the situation that do not affect illuminance of image plane, can also blocks peripheral spurious rays, when making image plane center resolution high, also there is very high resolution at the edge.
In order to realize that whole process can both realize focusing in the scope of infinite distance from microspur from the low power to the high power, in design process, not only in the low power position, object is carried out aberration correction in infinite distance and distance element, simultaneously also object is carried out aberration correction in infinite distance and distance element in the high power position, good each aberration of producing in infinite distance and microspur situation of balanced each multiplying power position object makes system all have good resolution at whole zoom process object in from distance element to the infinite distance scope.
In addition, suitable adjusting the 4th lens combination, the 5th lens combination in use procedure, the conjugate distance variable quantity that itself and the second lens combination are produced in object infinite distance and microspur situation offsets, and realizes the image planes compensation, just can access high-quality picture.
Adopt wide spectrum during the utility model design, and the Theory Solution image force of design image sharpness and color reducibility have been guaranteed far above theoretical desired value.
The below lifts the actual design case of one 10 times of zooms:
Zoom moving range between described each lens combination:
Interval 0.380-20.465mm between first lens group～second lens combination.
Interval 27.747-0.861mm between the second lens combination～diaphragm.
Interval 12.250-0.448mm between the 3rd lens combination～the 4th lens combination.
Interval 2.782-18.918mm between the 4th lens combination～the 5th lens combination.
Claims (7)
1. the optical system of the little large multiplying power zoom of volume, it is characterized in that: be provided with successively first lens group, the second lens combination, the 3rd lens combination and the 4th lens combination and the 5th lens combination between (18) from the subject to image planes, described first lens group maintains static with respect to image planes (18), the second lens combination can be along the forward and backward movement of image direction with respect to image planes (18), the 3rd lens combination maintains static with respect to image planes (18), the focal length of described first lens group is for just, and the focal length of the second lens combination is for negative.
2. the optical system of the little large multiplying power zoom of a kind of volume according to claim 1, it is characterized in that: described first lens group is comprised of first lens (1), the second lens (2), the 3rd lens (3); Described the second lens combination is comprised of the 4th lens (4), the 5th lens (5), the 6th lens (6), the 7th lens (7); Described the 3rd lens combination is comprised of the 8th lens (9), the 9th lens (10); Described the 4th lens combination is comprised of the tenth lens (11), the 11 lens (12), the 12 lens (13), the 13 lens (14); Described the 5th lens combination is comprised of the 14 lens (15), the 15 lens (16).
3. the optical system of the little large multiplying power zoom of a kind of volume according to claim 2, it is characterized in that: described the 4th lens combination, the 5th lens combination can be along the forward and backward movements of image direction with respect to image planes (18).
4. the optical system of the little large multiplying power zoom of a kind of volume according to claim 3 is characterized in that: described first lens (1) and the second lens (2) use optical glue to be bonded together; The 6th lens (6) and the 7th lens (7) use optical glue to be bonded together; The 8th lens (9) and the 9th lens (10) use optical glue to be bonded together; The 12 lens (13) and the 13 lens (14) use optical glue to be bonded together; The 14 lens (15) and the 15 lens (16) use optical glue to be bonded together.
5. the optical system of the little large multiplying power zoom of a kind of volume according to claim 4 is characterized in that: the focal power of described the 3rd lens combination is being for just, and the focal power of the 4th lens combination is being for just, and the focal power of the 5th lens combination is for just.
6. the optical system of the little large multiplying power zoom of a kind of volume according to claim 4 is characterized in that: in described varifocal optical system, all lens are spherical lens and material is optical glass.
7. the optical system of the little large multiplying power zoom of a kind of volume according to claim 4, it is characterized in that: be provided with diaphragm (8) between the 7th lens (7) and the 8th lens (9), be provided with optical filter (17) between the 15 lens (16) and image planes (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320273026 CN203275753U (en) | 2013-05-17 | 2013-05-17 | Optical system having small volume and large zoom ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320273026 CN203275753U (en) | 2013-05-17 | 2013-05-17 | Optical system having small volume and large zoom ratio |
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| Publication Number | Publication Date |
|---|---|
| CN203275753U true CN203275753U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320273026 Expired - Lifetime CN203275753U (en) | 2013-05-17 | 2013-05-17 | Optical system having small volume and large zoom ratio |
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| CN (1) | CN203275753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235399A (en) * | 2013-05-17 | 2013-08-07 | 中山联合光电科技有限公司 | A high-pixel macro-focus large-magnification zoom optical system |
| CN108254907A (en) * | 2018-03-20 | 2018-07-06 | 嘉兴中润光学科技有限公司 | Zoom lens |
-
2013
- 2013-05-17 CN CN 201320273026 patent/CN203275753U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235399A (en) * | 2013-05-17 | 2013-08-07 | 中山联合光电科技有限公司 | A high-pixel macro-focus large-magnification zoom optical system |
| CN108254907A (en) * | 2018-03-20 | 2018-07-06 | 嘉兴中润光学科技有限公司 | Zoom lens |
| CN108254907B (en) * | 2018-03-20 | 2019-08-23 | 嘉兴中润光学科技有限公司 | Zoom lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHONGSHAN LIANHE PHOTOELECTRIC TECHNOLOGY CO., LTD Free format text: FORMER NAME: ZHONGSHAN UNION OPTIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee after: UNION OPTECH Co.,Ltd. Address before: 528400 Guangdong province Zhongshan Dongli Torch Development Zone torch joint electronic city building A3 Patentee before: UNION OPTECH Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |