CN204028454U - The varifocal optical system of a kind of smaller size smaller, high resolving power, large image planes - Google Patents
The varifocal optical system of a kind of smaller size smaller, high resolving power, large image planes Download PDFInfo
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- CN204028454U CN204028454U CN201420469352.7U CN201420469352U CN204028454U CN 204028454 U CN204028454 U CN 204028454U CN 201420469352 U CN201420469352 U CN 201420469352U CN 204028454 U CN204028454 U CN 204028454U
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- 238000000034 method Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
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Abstract
The utility model relates to a kind of smaller size smaller, high resolving power, the varifocal optical system of large image planes, include sensitive chip, energy its first fixing lens group and the 3rd lens group is relatively provided with in the side of described sensitive chip, being provided with between lens group with sensitive chip the 3rd can relative to the 4th lens group of its movement, be provided with between the first lens group with the 3rd lens group and can move relative to sensitive chip, and optical system from short focus to the change procedure of long-focus gradually to the second lens group of the 3rd lens group movement, the first described lens group, 3rd lens group, the focal length of the 4th lens group is just, second lens group focal length is negative, the front-end and back-end of described 3rd lens group are respectively provided with one piece for correcting most aberration, camera lens is made to obtain the aspherical lens of higher image quality.The utility model has small size, high resolving power, the advantage of large image planes, can reach infrared confocal effect, make a video recording clear.
Description
[technical field]
The utility model relates to a kind of varifocal optical system, particularly relate to a kind of be applied to supervisory system smaller size smaller, high resolving power, large image planes varifocal optical system.
[background technology]
At present in order to monitor the demand in market, starting the future development toward high resolving power and high picture element, in order to obtain better image quality, using the chip that pixel is larger, it is basic that the more chip of pixel solves often, and common monitoring camera often cannot accomplish large image planes and volume compatibility.
The monitoring camera of the high picture element on the market of current main flow, mostly resolution is 1080p, pixel number 2,000,000, but along with the lifting of data rate, the picture transmission of higher picture element becomes possibility, and 2,000,000 pixels can not satisfy the demands; And the resolution of the camera lens of larger image planes is all not enough.
The camera lens image planes of the 1080P of current main flow mainly 1/2.8 "; use 1/2.8 of effective imaging surface diagonal line 6.2mm " the occasion of CMOS be example, its pixel size only has 2.8 μm, be 0 point with center, 0.8 image planes size and 6.2mm*0.8/2=2.48 position, discernmible black and white line reaches only has 850TVline, and resolution is not very high.And due to pixel very little, its performance such as photonasty and color rendition is not very desirable, be badly in need of performance improve;
The monitoring camera of large picture in the market, as 1, and " camera lens of left and right, image planes size reaches 16.0mm, and its volume ratio is comparatively large, and is mostly tight shot, is difficult to control when monitoring distance and changing.
Monitoring camera in the market, how non-infrared confocal camera lens, therefore in the more occasion of optical wavelength section as at dusk, or when having part lighting an evening, the picture of shooting cannot be overall clear, always has obscure portions.
[utility model content]
The utility model object is the infrared confocal varifocal optical system overcoming deficiency of the prior art and provide a kind of smaller size smaller, high resolving power, large image planes.
In order to solve the technical matters of above-mentioned existence, the varifocal optical system of a kind of smaller size smaller of the present utility model, high resolving power, large image planes by the following technical solutions:
A kind of smaller size smaller, high resolving power, the varifocal optical system of large image planes, it is characterized in that: a kind of smaller size smaller, high resolving power, the varifocal optical system of large image planes, it is characterized in that: include the sensitive chip 5 light being changed into electric signal, energy the first lens group 1 that sensitive chip 5 is fixing relatively and the 3rd lens group 3 is provided with in the side of described sensitive chip 5, at the 3rd lens group 3 be provided with between sensitive chip 5 can relative to the 4th lens group 4 of sensitive chip 5 movement, be provided with between the first lens group 1 with the 3rd lens group 3 and can move relative to sensitive chip 5, and optical system from short focus to the change procedure of long-focus gradually to the second lens group 2 of the 3rd lens group 3 movement, the focal length of the first described lens group 1 is just, the focal length of the 3rd lens group 3 is just, the focal length of the 4th lens group 4 is just, the focal length of the second described lens group 2 is negative, the diaphragm 6 controlling to enter camera lens amount of beam is provided with between the second lens group 2 and the 3rd lens group 3, the front-end and back-end of described 3rd lens group 3 are respectively provided with one piece for correcting most aberration, camera lens is made to obtain the aspherical lens 301 and 304 of higher image quality.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, is characterized in that: the aspherical lens 301 and 304 on described 3rd lens group 3 is Glass aspheric eyeglass.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, it is characterized in that: the aspherical lens 301 and 304 of described 3rd lens group 3, its aspherical surface shape meets following equation:
In this formula, the curvature of parameter c corresponding to radius, y is radial coordinate, its unit is identical with length of lens unit, k is circular cone whose conic coefficient, when k-factor is less than-1, face shape curve is hyperbolic curve, be para-curve when k-factor equals-1, be oval when k-factor is between-1 to 0, be circle when equaling 0, be oblate when being greater than 0, α 1 to α 8 represents the coefficient corresponding to each radial coordinate respectively, accurately can be set the geomery of both-sided aspherical before and after lens by above parameter.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, it is characterized in that: the described 3rd is provided with the spheric glass 303 that the higher spheric glass 302 of one piece of A Erbei number and the higher material of one piece of refractive index make in the middle of lens group 3, under their acting in conjunction, can effective correcting chromatic aberration, make to obtain infrared light and luminous ray has confocal effect.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, it is characterized in that: described second lens group 2 include focal length be bear, first piece of eyeglass 201 that high index of refraction and the material of high dispersion are made, focal length is second piece of negative eyeglass 202, and focal length is the 3rd piece of positive eyeglass 203.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, is characterized in that: second piece of eyeglass 202 and the 3rd piece of eyeglass 203 of described second lens group 2 are cemented doublet.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, it is characterized in that: described first lens group 1 is made up of four pieces of eyeglasses, wherein first piece of eyeglass 101 focal length for negative, second piece of eyeglass 102 focal length be just, the 3rd piece of eyeglass 103 focal length be just.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, it is characterized in that: described 4th lens group 4 can be made up of three pieces of eyeglasses, including focal length is first piece of negative eyeglass 401, focal length is second piece of positive eyeglass 402, focal length is the 3rd piece of negative eyeglass 403, eyeglass 402 is glued together mainly plays focus function for 401, second piece, described first piece of eyeglass, and its positive and negative combination effectively can reduce the aberration change of camera lens in zooming procedure.
The varifocal optical system of a kind of smaller size smaller as above, high resolving power, large image planes, is characterized in that: 2 curvature radius R value differences of the 3rd piece of eyeglass 403 of described 4th lens group 4 are in 5mm.
The beneficial effects of the utility model are:
1, zoom lens of the present utility model to employ containing 2 pieces of non-spherical glass lens at interior 13 pieces of eyeglasses, obtains higher quality when lesser amt, and small volume, and the transmitance of camera lens is also higher;
2, zoom lens of the present utility model uses iris, and reaches 1.6 at nearly burnt end FNO., reaches 2.4 at focal length end FNO., there is high photosensitive property, when regulating aperture change, using under being applicable to multiple illuminating position, can also sharpness be regulated, improve lens effect;
3, zoom lens of the present utility model uses Glass aspheric eyeglass, and do not use plastic aspherical element eyeglass, therefore temperature variation is very little to the performance impact of camera lens, all can use in a variety of contexts.
4, zoom lens of the present utility model employs 4 eyeglass groups, front 4 group intervals are changes, and the change of front 3 eyeglass group interblock spaces makes the focal length of camera lens change, and the 4th eyeglass group is used for focus function, camera lens reaches 12mm at short focal length, and focal length focal length is greater than 40mm;
5, whole camera lens of the present utility model take a group as peak, and the distance and position of a group and image planes does not change, and it is highly less than 110mm, in use 1 " in the camera lens of CCD, small volume;
6, the utility model can reach the resolution higher than 10M (pixel 1,000 ten thousand pixel), for 1 of 16.05mm " CCD; the present invention can reach center resolution, and higher than 160lp/mm, periphery 0.7H (70% diagonal positions), resolution is higher than 1600tvline, and resolution is high;
7, zoom lens of the present utility model utilizes group 4 to realize AF automatic focusing function, and can both become image clearly from farthest infinite as far as nearest 1000mm microspur, imaging effect is good;
8, camera lens of the present utility model achieves omnidistance infrared confocal, can reach clear simultaneously, therefore under multiple wave band existent condition, make picture entirety all clear at visible wavelength section 430nm-650nm and infrared lamp wavelength period 830nm-870nm.
[accompanying drawing explanation]
Fig. 1 is system optics figure of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in detail:
As shown in Figure 1, the varifocal optical system of a kind of smaller size smaller, high resolving power, large image planes, includes the first lens group 1, second lens group 2, the 3rd lens group 3, the 4th lens group 4 and sensitive chip 5.Diaphragm 6 is provided with, the adjustable number of beams entering camera lens of diaphragm between described second lens group 2 and the 3rd lens group 3.The second described lens group 2, the 4th lens group 4 in zoom process relative to the position of sensitive chip be variation, and the relative position between the first lens group 1, the 3rd lens group 3 is fixing, the relative position between the second lens group 2, the 4th lens group 4 is variation.
Distance between described first lens group 1, the 3rd lens group 3 is fixed, and the second lens group moves between the first lens group 1 and the 3rd lens group 3.Described second lens group 2 is from short focus to drawing close to the 3rd lens group 3 gradually in the change procedure of long-focus.
This optical system is made up of 13 pieces of eyeglasses.
The focal length of the first described lens group 1 entirety is just, this first lens group 1 is made up of four pieces of eyeglasses, wherein first piece of eyeglass 101 focal length for negative, second piece of eyeglass 102, the 3rd piece of eyeglass 103 focal length be just.
The focal length of described second lens group 2 entirety is negative, and this second lens group 2 is made up of three pieces of eyeglasses, wherein the focal length of first piece of eyeglass 201 be bear, the focal length of second piece of eyeglass 202 be bear, the focal length of the 3rd piece of eyeglass 203 is being for just.Wherein first piece of lens 201 is for employing high index of refraction and the material of high dispersion, effectively can correct the distortion of camera lens when short Jiao herein; Can increase substantially the resolution under short coke-like state, second piece of eyeglass 202 and the 3rd piece of eyeglass 203 are cemented doublet simultaneously, and the space can reduced in group is that the moving range of 2 groups increases, to obtain more zooming range.
Described 3rd lens group 3 whole focal length is just, the 3rd lens group 3 is made up of four pieces of eyeglasses, and wherein the focal length of first piece of eyeglass 301 is just, second piece of eyeglass 302 focal length is just, the focal length of the 3rd piece of eyeglass 303, the 4th piece of eyeglass 304 is just.Wherein first piece of eyeglass is Glass aspheric eyeglass, 302 and 303 is bonding eyeglass, 304 is Glass aspheric eyeglass, 3rd lens group employs front-end and back-end and uses two pieces of Glass aspheric eyeglasses 301 and 304 to be used for correcting most aberration, make camera lens obtain higher image quality, reduce the distance of the 3rd lens group and the first lens group and sensitive chip simultaneously, shorten camera lens volume, and the 3rd group of camera lens apertures are minimum, use aspherical lens can reduce camera lens cost.Middle 2 pieces of spheric glasses 302 and 303 are differentiated and are employed the material that a slice A Erbei number is higher and one piece of refractive index is higher, can effective correcting chromatic aberration, make to obtain infrared light and the confocal effect of luminous ray, and the picture color taken reduce better.
The focal length of the 4th lens group 4 entirety is just, 4th lens group 4 can be made up of three pieces of eyeglasses, be negative by one piece of eyeglass 401 focal length in the present embodiment, second piece of eyeglass 402 is just, 401 and 402 glued togetherly mainly play focus function, and its positive and negative combination effectively can reduce the aberration change of camera lens in zooming procedure, 3rd piece of eyeglass 403 is focal lengths is negative, and 2 R values are more close, make whole camera lens can obtain larger image planes, make maximum image planes reach 16.5mm.
First piece of eyeglass 301 of the 3rd lens group 3 and the 4th piece of eyeglass 304 are aspheric surface, and its aspherical surface shape meets following equation:
In formula, the curvature of parameter c corresponding to radius, y is radial coordinate (its unit is identical with length of lens unit), and k is circular cone whose conic coefficient.When k-factor is less than-1, face shape curve is hyperbolic curve, is para-curve when equaling-1, is oval time between-1 to 0, for circular when equaling 0, for oblate when being greater than 0.α
1to α
8represent the coefficient corresponding to each radial coordinate respectively, accurately can be set the geomery of both-sided aspherical before and after lens by above parameter.
Camera lens FNO=EFL (focal length)/D (diaphragm diameter), for tight shot, diaphragm diameter, more greatly, logical light quantity is larger; Because sensor can adjust exposure value automatically under general environment, now just more do not go out the quality of the different camera lens of FNO numerical value, but under the environmental baseline of low-light (level), exposure sensor arrives the limit, therefore the camera lens that FNO numerical value is little shows than preferably, zoom lens of the present invention uses iris, and reach 1.6 at nearly burnt end FNO., 2.4 are reached at focal length end, there is high photosensitive property, when regulating aperture change, using under being applicable to multiple illuminating position, can also sharpness be regulated.
Lift the actual design case of a high-power zoom lens below:
Aspheric surface parameter:
Group's zoom, focusing mobile scope:
Interval 22.5mm between 1 ~ 3 group
Interval 22.6mm ~ 2.1mm between 2 ~ 3 groups
Distance 0.75mm between 3 ~ 4 groups ~ 12.1mm
4 ~ image planes distance 17.5-34.5mm
Claims (9)
1. a smaller size smaller, high resolving power, the varifocal optical system of large image planes, it is characterized in that: include the sensitive chip (5) light being changed into electric signal, the side of described sensitive chip (5) is provided with energy its fixing the first lens group (1) and the 3rd lens group (3) relatively, at the 3rd lens group (3) be provided with between sensitive chip (5) can relative to the 4th lens group (4) of sensitive chip (5) movement, be provided with between the first lens group (1) with the 3rd lens group (3) and can move relative to sensitive chip (5), and optical system from short focus to the change procedure of long-focus gradually to second lens group (2) of the 3rd lens group (3) movement, described the first lens group (1), the focal length of the 3rd lens group (3) and the 4th lens group (4) is just, the focal length of described the second lens group (2) is negative, the diaphragm (6) controlling to enter camera lens amount of beam is provided with between the second lens group (2) and the 3rd lens group (3), the front-end and back-end of described 3rd lens group (3) are respectively provided with one piece for correcting most aberration, camera lens is made to obtain the aspherical lens (301 of higher image quality, 304).
2., according to the varifocal optical system of a kind of smaller size smaller according to claim 1, high resolving power, large image planes, it is characterized in that: described aspherical lens (301,304) is Glass aspheric eyeglass.
3., according to the varifocal optical system of a kind of smaller size smaller according to claim 2, high resolving power, large image planes, it is characterized in that: aspherical lens (301,304) its aspherical surface shape of described 3rd lens group (3) meets following equation:
in formula, the curvature of parameter c corresponding to radius, y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient, when k-factor is less than-1, face shape curve is hyperbolic curve, being para-curve when equaling-1, is oval time between-1 to 0, is circle when equaling 0, be oblateness when being greater than 0, α
1to α
8represent the coefficient corresponding to each radial coordinate respectively, accurately can be set the geomery of both-sided aspherical before and after lens by above parameter.
4. according to the varifocal optical system of a kind of smaller size smaller according to claim 3, high resolving power, large image planes, it is characterized in that: the described 3rd is provided with the spheric glass (303) that the higher spheric glass (302) of one piece of A Erbei number and the higher material of one piece of refractive index make in the middle of lens group (3), can effective correcting chromatic aberration, make to obtain infrared light and luminous ray has confocal effect.
5. according to the varifocal optical system of a kind of smaller size smaller according to claim 4, high resolving power, large image planes, it is characterized in that: described second lens group (2) include focal length be bear, first piece of eyeglass (201) that high index of refraction and the material of high dispersion are made, focal length is second piece of negative eyeglass (202), and focal length is the 3rd piece of positive eyeglass (203).
6., according to the varifocal optical system of a kind of smaller size smaller according to claim 5, high resolving power, large image planes, it is characterized in that: second piece of eyeglass (202) and the 3rd piece of eyeglass (203) of described second lens group (2) are cemented doublet.
7. according to the varifocal optical system of a kind of smaller size smaller according to claim 6, high resolving power, large image planes, it is characterized in that: described first lens group (1) is made up of four pieces of eyeglasses, wherein first piece of eyeglass (101) focal length for negative, second piece of eyeglass (102), the 3rd piece of eyeglass (103) focal length be just.
8. according to the varifocal optical system of a kind of smaller size smaller according to claim 7, high resolving power, large image planes, it is characterized in that: described 4th lens group (4) can be made up of three pieces of eyeglasses, including focal length is first piece of negative eyeglass (401), focal length is second piece of positive eyeglass (402), focal length is the 3rd piece of negative eyeglass (403), described first piece of eyeglass (401), second piece of eyeglass (402) is glued together mainly plays focus function, and its positive and negative combination effectively can reduce the aberration change of camera lens in zooming procedure.
9. according to the varifocal optical system of a kind of smaller size smaller according to claim 8, high resolving power, large image planes, it is characterized in that: 2 curvature radius R value differences of the 3rd piece of eyeglass (403) of described 4th lens group (4) are in 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420469352.7U CN204028454U (en) | 2014-08-19 | 2014-08-19 | The varifocal optical system of a kind of smaller size smaller, high resolving power, large image planes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142569A (en) * | 2014-08-19 | 2014-11-12 | 中山联合光电科技有限公司 | Small-size, high-resolution and large-image-surface zoom optical system |
| CN105242353A (en) * | 2015-09-18 | 2016-01-13 | 核工业理化工程研究院 | Optical fiber focus lens set |
| CN105445916A (en) * | 2015-12-25 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-magnification and short-focal end infrared confocal zooming optical system |
| CN107450168A (en) * | 2017-09-05 | 2017-12-08 | 嘉兴中润光学科技有限公司 | In dolly-out, dolly-back interchangeable tight shot |
-
2014
- 2014-08-19 CN CN201420469352.7U patent/CN204028454U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142569A (en) * | 2014-08-19 | 2014-11-12 | 中山联合光电科技有限公司 | Small-size, high-resolution and large-image-surface zoom optical system |
| CN105242353A (en) * | 2015-09-18 | 2016-01-13 | 核工业理化工程研究院 | Optical fiber focus lens set |
| CN105242353B (en) * | 2015-09-18 | 2019-07-05 | 核工业理化工程研究院 | Optical fiber focuses microscope group |
| CN105445916A (en) * | 2015-12-25 | 2016-03-30 | 中山联合光电科技股份有限公司 | High-magnification and short-focal end infrared confocal zooming optical system |
| CN107450168A (en) * | 2017-09-05 | 2017-12-08 | 嘉兴中润光学科技有限公司 | In dolly-out, dolly-back interchangeable tight shot |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee after: UNION OPTECH Co.,Ltd. Address before: 528400 Zhongshan Torch Development Zone, Guangdong Road, No. 10 Patentee before: UNION OPTECH Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141217 |
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