CN205121050U - Commutative formula camera lens reaches no anti - digital camera including this camera lens - Google Patents
Commutative formula camera lens reaches no anti - digital camera including this camera lens Download PDFInfo
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- CN205121050U CN205121050U CN201520878268.5U CN201520878268U CN205121050U CN 205121050 U CN205121050 U CN 205121050U CN 201520878268 U CN201520878268 U CN 201520878268U CN 205121050 U CN205121050 U CN 205121050U
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- camera lens
- interchangeable camera
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Abstract
The utility model discloses an interchangeable lens and including the no anti - digital camera of this camera lens, wherein this camera lens including arrange in order have the positive refraction rate first battery of lens, the second battery of lens of negative refraction rate, the fourth battery of lens that has the third battery of lens of negative refraction rate and have the positive refraction rate have, first battery of lens is located and inclines near the object space, the fourth battery of lens is located and inclines near the image space, the third battery of lens is including the first negative lens and the aspherical lens that arrange in order, first negative lens is located and inclines near the object space, an aspherical lens lies in and inclines near the image space. The utility model discloses a camera lens has super large light ring and the good advantage of image quality.
Description
Technical field
The utility model relates to phtographic lens technical field, be specifically related to a kind of interchangeable camera lens and comprise this camera lens without anti-digital camera, especially relate to a kind of without anti-digital camera super large aperture silent frame interchangeable lens.
Background technology
At present, a kind ofly can exchange camera lens, camera by LCD live view without anti-digital camera, because it has the advantages such as volume is little, lightweight compared to common slr camera, and compared to the advantage that conventional cards facility have pixel high, market share is more and more higher.
Without anti-digital camera owing to being a kind of emerging product, market is applicable to the interchangeable camera lens of this series products or fewer.Although also can be applied to without anti-digital camera after the existing camera lens being applied to single anti-digital camera is increased adapter ring, greatly can affect image quality like this, not be suitable for the application of high-end photography.
The current camera lens accomplishing the large aperture design of focal length 85mm, such as, the anti-digital camera lens of list as shown in Figure 1, but all adopt spherical lens to form due to it, larger spherical aberration can be produced, thus affect image quality.
Utility model content
Therefore, the technical problems to be solved in the utility model is that lens imaging of the prior art is of poor quality.
For this reason, a kind of interchangeable camera lens of the present utility model, comprises first lens combination with positive refracting power of arranging in turn, second lens combination with negative index, has the 3rd lens combination of negative index and have the 4th lens combination of positive refracting power; Described first lens combination is positioned near object space side, and described 4th lens combination is positioned near image side;
Described 3rd lens combination comprises first negative lens and the first non-spherical lens of arranging in turn; Described first negative lens is positioned near object space side, and described first non-spherical lens is positioned near image side.
Preferably, described interchangeable camera lens meets the following conditions:
0.8≤f
1/f
w≤1
Wherein, f
1represent the focal length of described first lens combination, f
wrepresent the focal length of described interchangeable camera lens.
Preferably, described interchangeable camera lens also meets the following conditions:
1≤|f
2|/f
w≤1.2
Wherein, f
2represent the focal length of described second lens combination, f
wrepresent the focal length of described interchangeable camera lens.
Preferably, the focal distance f of described first negative lens
31meet :-65mm≤f
31≤-55mm.
Preferably, described first lens combination comprises the first positive lens, the focal distance f of described first positive lens
11meet: 75mm≤f
11≤ 85mm.
Preferably, described second lens combination comprises the first balsaming lens;
The focal distance f of described first balsaming lens
21meet :-95mm≤f
21≤-90mm.
Preferably, described first balsaming lens comprises the second positive lens and the second negative lens; Described second positive lens is positioned near object space side, and described second negative lens is positioned near image side.
Preferably, described 4th lens combination comprises second balsaming lens and the second non-spherical lens of arranging in turn; Described second balsaming lens is positioned near object space side, and described second non-spherical lens is positioned near image side;
The focal distance f of described second balsaming lens
41meet: 40mm≤f
41≤ 45mm.
Preferably, described second balsaming lens comprises the 3rd negative lens and the 3rd positive lens; Described 3rd negative lens is positioned near object space side, and described 3rd positive lens is positioned near image side.
Preferably, also aperture diaphragm is provided with between described second lens combination and the 3rd lens combination.
Preferably, the focal length of described interchangeable camera lens is 85mm and aperture F is 1.2.
One of the present utility model, without anti-digital camera, comprises above-mentioned interchangeable camera lens.
Technical solutions of the utility model, tool has the following advantages:
1. the interchangeable camera lens that provides of the utility model embodiment, by arranging positive and negative, negative, positive version, and the 3rd lens combination is designed to the first negative lens and the first non-spherical lens combination formation, namely have employed sphere and add aspheric compact design, thus make its structure compacter, and then reduce the volume of camera lens, because non-spherical lens is less compared to the spherical lens volume of same parameter, weight is lighter, so be extremely suitable for using without on anti-digital camera.And owing to introducing non-spherical lens, avoid the larger spherical aberration produced because all adopting spherical mirror, thus improve image quality.
2. the interchangeable camera lens that provides of the utility model embodiment, by arranging 0.8≤f
1/ f
w≤ 1 and/or 1≤| f
2|/f
w≤ 1.2, light beam can by incident beam reduced width after passing through first, second lens combination, thus be the less advantage that provides of volume of the structural design of follow-up imaging lens group (the 3rd, the 4th lens combination), and also meet the super large aperture designing requirement of interchangeable camera lens, ensure that captured image has outstanding image quality and virtualization effect.
3. the interchangeable camera lens that provides of the utility model embodiment, by adopting balsaming lens, can simplify the structure of camera lens further, to reduce its volume, alleviating its weight.By designing the scope of the first negative lens, the first positive lens, the first balsaming lens, the second balsaming lens focal length, by cooperatively interacting between them, the aperture of camera lens can be expanded further, meeting the designing requirement of wide-angle, super large aperture.The global design of this camera lens makes more excellent compared with the MTF performance of other similar camera lenses, and distortion, aberration etc. are all less, thus improve image quality further.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the lens structure schematic diagram of the anti-digital camera lens of list of the prior art;
Fig. 2 is the lens structure schematic diagram of a concrete example of interchangeable camera lens in the utility model embodiment 1;
Fig. 3 is the lens surface distribution schematic diagram of a concrete example of interchangeable camera lens in the utility model embodiment 1;
Fig. 4 is focal length 85mm, the MTF of the interchangeable camera lens of aperture F1.2 schemes;
Fig. 5 is the lateral chromatic aberration figure of interchangeable camera lens of focal length 85mm, aperture F1.2;
Fig. 6 is the relative exposure figure of interchangeable camera lens of focal length 85mm, aperture F1.2.
Reference numeral: I-the first lens combination, II-the second lens combination, III-three lens combination; IV-four lens combination, 1-first positive lens, 2-second positive lens; 3-second negative lens, 4-first negative lens, 5-first non-spherical lens; 6-the 3rd negative lens; 7-the 3rd negative lens, 8-second non-spherical lens, 10-aperture diaphragm; 20-cover glass, 30-screen.
Embodiment
Be clearly and completely described the technical solution of the utility model below in conjunction with accompanying drawing, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it should be noted that, orientation or the position relationship of the instruction such as term "left", "right" are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In addition, if below in the described different embodiment of the utility model involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of interchangeable camera lens, such as, be applicable to without anti-digital camera, and as shown in Figure 2, left is object space side, and right is image side, and light beam finally images in the screen 30 of right from left incidence, is cover glass 20 before screen 30.This interchangeable camera lens comprises first lens combination I with positive refracting power of arranging in turn, second lens combination II with negative index, has the 3rd lens combination III of negative index and have the 4th lens combination IV of positive refracting power; First lens combination I is positioned near object space side, and the 4th lens combination IV is positioned near image side.3rd lens combination III comprises first negative lens 4 and first non-spherical lens 5 of arranging in turn; First negative lens 4 is positioned near object space side, and the first non-spherical lens 5 is positioned near image side.
Above-mentioned interchangeable camera lens, by arranging positive and negative, negative, positive version, and the 3rd lens combination is designed to the first negative lens and the first non-spherical lens combination formation, namely have employed sphere and add aspheric compact design, thus make its structure compacter, and then reduce the volume of camera lens, because non-spherical lens is less compared to the spherical lens volume of same parameter, weight is lighter, so be extremely suitable for using without on anti-digital camera.And owing to introducing non-spherical lens, avoid the larger spherical aberration produced because all adopting spherical mirror, thus improve image quality.
Preferably, between the second lens combination II and the 3rd lens combination III, be also provided with aperture diaphragm 10, sharpness and the brightness of imaging can be improved.
Preferably, above-mentioned interchangeable camera lens can at least one of meet the following conditions:
(1)0.8≤f
1/f
w≤1
(2)1≤|f
2|/f
w≤1.2
Wherein, f
1represent the focal length of the first lens combination I, f
2represent the focal length of described second lens combination II, f
wrepresent the focal length of described interchangeable camera lens.
Above-mentioned interchangeable camera lens, by arranging 0.8≤f
1/ f
w≤ 1 and/or 1≤| f
2|/f
w≤ 1.2, light beam can by incident beam reduced width after passing through first, second lens combination, thus be the less advantage that provides of volume of the structural design of follow-up imaging lens group (the 3rd, the 4th lens combination), and also meet the super large aperture designing requirement of interchangeable camera lens, ensure that captured image has outstanding image quality and virtualization effect.
Preferably, as shown in Figure 2, the first lens combination I of above-mentioned interchangeable camera lens comprises the first positive lens 1, second lens combination II and comprises the first balsaming lens, and the 4th lens combination IV comprises second balsaming lens and the second non-spherical lens 8 of arranging in turn; Second balsaming lens is positioned near object space side, and the second non-spherical lens 8 is positioned near image side.
The focal distance f of the first negative lens 4
31meet :-65mm≤f
31≤-55mm.
The focal distance f of the first positive lens 1
11meet: 75mm≤f
11≤ 85mm.
The focal distance f of the first balsaming lens
21meet :-95mm≤f
21≤-90mm.
The focal distance f of the second balsaming lens
41meet: 40mm≤f
41≤ 45mm.
The aspheric surface mode of the first non-spherical lens 5 and the second non-spherical lens 8 all can be represented by following formula:
Wherein, parameter R, K, AR4, AR6, AR8 are asphericity coefficient, the aspherical shape that can obtain as required and adjusting.
Above-mentioned interchangeable camera lens, by adopting balsaming lens, can simplify the structure of camera lens further, to reduce its volume, alleviating its weight.By designing the scope of the first negative lens, the first positive lens, the first balsaming lens, the second balsaming lens focal length, by cooperatively interacting between them, the aperture of camera lens can be expanded further, meeting the designing requirement of wide-angle, super large aperture.The global design of this camera lens makes more excellent compared with the MTF performance of other similar camera lenses, and distortion, aberration etc. are all less, thus improve image quality further.
Further preferably, the first balsaming lens comprises the second positive lens 2 and the second negative lens 3; Second positive lens 2 is positioned near object space side, and the second negative lens 3 is positioned near image side.Second balsaming lens comprises the 3rd negative lens 6 and the 3rd positive lens 7; 3rd negative lens 6 is positioned near object space side, and the 3rd positive lens 7 is positioned near image side.The cooperation of this positive and negative lens, can correct paraxial spherical aberration, corrects aberration, further increases image quality.
To specifically introduce a kind of numerical example of above-mentioned interchangeable camera lens below, as shown in Figure 3, surface number is from left to right respectively r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, and concrete numerical value is as shown in the table, unit: mm.
Material type in upper table is the material type in simulation software in glass storehouse, such as ZEMAX simulation software, and different material types embodies different refractive indexes.
The asphericity coefficient of the first non-spherical lens 5 is as shown in the table:
| Asphericity coefficient | r8 | r9 |
| R | -108.0 | -145.0 |
| K | 1.0 | -1.0 |
| AR4 | -3.3914E-05 | -2.8163E-05 |
| AR6 | -1.2121E-08 | 6.7278E-09 |
| AR8 | -5.45E-12 | 3.51E-12 |
The asphericity coefficient of the second non-spherical lens 8 is as shown in the table:
| Asphericity coefficient | r13 | r14 |
| R | 56.35 | 69.75 |
| K | -0.8504 | 1.0 |
| AR4 | 1.4072E-05 | 1.9774E-05 |
| AR6 | 1.6515E-08 | 2.02E-08 |
| AR8 | -1.67E-12 | 2.546E-11 |
The focal length 85mm of above-mentioned interchangeable camera lens, aperture F1.2 are a kind of professional, high-end phtographic lenses of silent frame.It will be understood by those of skill in the art that the numerical example of the interchangeable camera lens of focal length 85mm, aperture F1.2 is not limited to above-mentioned numerical example, also can be realized the silent frame interchangeable camera lens of focal length 85mm, aperture F1.2 by other numerical examples.
As shown in Figure 4, the diagonal line half of definition CMOS useful area is maximum image height, being set to 1.0 visual fields, for measuring the spatial frequency of different image height, getting 0.8 visual field, 0.6 visual field, 0 visual field.The CMOS diagonal line half of the interchangeable camera lens of Fig. 4 mid-focal length 85mm, aperture F1.2 is 21.5mm, the i.e. image height of 1.0 visual fields, the image height of 0.8 visual field is 21.5 × 0.8=17.2mm, and the image height of 0.6 visual field is 21.5 × 0.6=12.9mm, the image height of 0 visual field is 0mm, is CMOS central point.
As shown in Figure 5, the lateral chromatic aberration of the interchangeable camera lens blue light of focal length 85mm, aperture F1.2 is 0.004mm, and the lateral chromatic aberration of ruddiness is 0.008mm, and lateral chromatic aberration that is red, blue light is all very little and both differences are also very little, has excellent imaging characteristic.
As shown in Figure 6, the relative exposure at the edge of the interchangeable camera lens of focal length 85mm, aperture F1.2 reaches more than 10%, meets imaging performance requirement.
Embodiment 2
The present embodiment provides a kind of without anti-digital camera, comprises the interchangeable camera lens in embodiment 1.That applies this interchangeable camera lens has the high advantage of image quality without anti-digital camera, and there is super large aperture due to camera lens, captured image has outstanding virtualization effect, under low light environment, shutter speed can be improved, more easily shoot the photo of high-quality, be particularly suitable for professional photography and use.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (12)
1. an interchangeable camera lens, is characterized in that, comprises first lens combination with positive refracting power of arranging in turn, second lens combination with negative index, has the 3rd lens combination of negative index and have the 4th lens combination of positive refracting power; Described first lens combination is positioned near object space side, and described 4th lens combination is positioned near image side;
Described 3rd lens combination comprises first negative lens and the first non-spherical lens of arranging in turn; Described first negative lens is positioned near object space side, and described first non-spherical lens is positioned near image side.
2. interchangeable camera lens according to claim 1, is characterized in that, described interchangeable camera lens meets the following conditions:
0.8≤f
1/f
w≤1
Wherein, f
1represent the focal length of described first lens combination, f
wrepresent the focal length of described interchangeable camera lens.
3. interchangeable camera lens according to claim 1, is characterized in that, described interchangeable camera lens also meets the following conditions:
1≤|f
2|/f
w≤1.2
Wherein, f
2represent the focal length of described second lens combination, f
wrepresent the focal length of described interchangeable camera lens.
4. interchangeable camera lens according to claim 1, is characterized in that, the focal distance f of described first negative lens
31meet :-65mm≤f
31≤-55mm.
5. interchangeable camera lens according to claim 1, is characterized in that, described first lens combination comprises the first positive lens, the focal distance f of described first positive lens
11meet: 75mm≤f
11≤ 85mm.
6. interchangeable camera lens according to claim 1, is characterized in that, described second lens combination comprises the first balsaming lens;
The focal distance f of described first balsaming lens
21meet :-95mm≤f
21≤-90mm.
7. interchangeable camera lens according to claim 6, is characterized in that, described first balsaming lens comprises the second positive lens and the second negative lens; Described second positive lens is positioned near object space side, and described second negative lens is positioned near image side.
8. interchangeable camera lens according to claim 1, is characterized in that, described 4th lens combination comprises second balsaming lens and the second non-spherical lens of arranging in turn; Described second balsaming lens is positioned near object space side, and described second non-spherical lens is positioned near image side;
The focal distance f of described second balsaming lens
41meet: 40mm≤f
41≤ 45mm.
9. interchangeable camera lens according to claim 8, is characterized in that, described second balsaming lens comprises the 3rd negative lens and the 3rd positive lens; Described 3rd negative lens is positioned near object space side, and described 3rd positive lens is positioned near image side.
10. interchangeable camera lens according to claim 1, is characterized in that, is also provided with aperture diaphragm between described second lens combination and the 3rd lens combination.
11. interchangeable camera lenses according to claim 1, is characterized in that, the focal length of described interchangeable camera lens is 85mm and aperture F is 1.2.
12. 1 kinds, without anti-digital camera, is characterized in that, comprise the interchangeable camera lens as described in any one of claim 1-11.
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|---|---|---|---|
| CN201520878268.5U CN205121050U (en) | 2015-11-03 | 2015-11-03 | Commutative formula camera lens reaches no anti - digital camera including this camera lens |
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|---|---|---|---|
| CN201520878268.5U CN205121050U (en) | 2015-11-03 | 2015-11-03 | Commutative formula camera lens reaches no anti - digital camera including this camera lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259639A (en) * | 2015-11-03 | 2016-01-20 | 中山市思锐摄影器材工业有限公司 | Exchangeable type lens and mirrorless digital camera comprising same |
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2015
- 2015-11-03 CN CN201520878268.5U patent/CN205121050U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259639A (en) * | 2015-11-03 | 2016-01-20 | 中山市思锐摄影器材工业有限公司 | Exchangeable type lens and mirrorless digital camera comprising same |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: Guangdong province Zhongshan City five factory 528458 Shan Industrial Zone Third Patentee after: Guangdong surway Phenix Optical Company Limited Address before: 528458 Guangdong city of Zhongshan Province five Shan Industrial Zone Third Patentee before: Zhongshan SIRUI Photographic Equipment Industry Co., Ltd. |