CN104991330A - Novel photographic lens - Google Patents
Novel photographic lens Download PDFInfo
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- CN104991330A CN104991330A CN201510417065.0A CN201510417065A CN104991330A CN 104991330 A CN104991330 A CN 104991330A CN 201510417065 A CN201510417065 A CN 201510417065A CN 104991330 A CN104991330 A CN 104991330A
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- lens
- lens combination
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Abstract
The invention discloses a novel photographic lens, which sequentially comprises a first lens group Gr1 with positive diopter and a second lens group Gr2 with positive diopter from an object side to an image plane side, wherein a cut off diaphragm ST1 is configured between the first lens group Gr1 with positive diopter and the second lens group Gr2; an aperture diaphragm ST2 is configured inside the second lens group Gr2, and a neutral gray negative-diopter lens A is configured between the cut off diaphragm ST1 and the aperture diaphragm ST2. When an object moves from an infinite remote position to a close distance, the first lens group Gr1 and the second lens group Gr2 move toward an object space to realize focus coincidence, and the photographic lens meets the following condition that 0.5<=|F1/(FA)|<=2.5. The novel photographic lens has the advantages of miniaturization, high performance, keen inside focus, soft outside focus, simple overall structure, high practicality, and easy popularization and application.
Description
Technical field
The present invention relates to pick-up lens applied technical field, be specially a kind of Novel photographic camera lens.
Background technology
At present, known Japanese Unexamined Patent Publication 11-231209 patent, from object side, be made up of the first lens combination Gr1 and the second lens combination Gr2, diaphragm is between two lens combination, the most object end place of second group is configured with APD filter (Apodization optical element apodization optical element), dimmed gradually from center to edge to realize defocused spot, forms the defocused spot that nature is soft and graceful.But, due to adopt ND filter glass and the glass refraction glued together mutually closely, cause the diopter of APD filter to be almost 0, very weak in other words, like this, there is no too large effect for rectification aberration, therefore aperture can not be too large, and performance also cannot be accomplished better.
Also has known Japanese Unexamined Patent Publication 2012-128151 patent, from object side, be made up of the first lens combination Gr1 and the second lens combination Gr2, diaphragm is between two lens combination, the most object end place of second group is configured with APD filter (Apodization optical element apodization optical element), dimmed gradually from center to edge to realize defocused spot, form the defocused spot that nature is soft and graceful.But owing to adopting deformable eyeglass, processing and manufacturing relative difficulty, commercialization difficulty, cost is also relatively high.
Summary of the invention
In order to overcome the shortcoming that above-mentioned known STF function (abbreviation of Smooth Transmission Focus) exists, the invention provides a high-performance, having of low cost is burnt interior sharp keen, the STF function phtographic lens that afocal is soft and graceful.
For achieving the above object, the invention provides following technical scheme: a kind of Novel photographic camera lens, comprise the first lens combination Gr1 of positive diopter successively to image planes side from object side, second lens combination Gr2 of positive diopter, cut off diaphragm ST1 is configured between the first lens combination Gr1 and the second lens combination Gr2, at the second lens combination inside configuration aperture diaphragm ST2, between cut off diaphragm ST1 and aperture diaphragm ST2, configuration neutral gray bears diopter lens A, thing object is from infinite distance to when closely moving, the first above-mentioned lens combination Gr1 and the second lens combination Gr2 moves to object space, realize focus.And the phtographic lens satisfied the following conditional expression.
0.5≤|F/FA|≤2.5 (1)
Wherein,
F: during infinity, the focal length of whole optical system;
The focal length of the FA: the second lens combination neutral gray negative lens A;
2. phtographic lens according to claim 1, is characterized in that, the formula that satisfies condition (2);
1≤|F1/F2|≤4 (2)
Wherein,
The focal length of the F1: the first lens combination Gr1;
The focal length of the F2: the second lens combination Gr2;
Micro-lens according to claim 1 and 2, the transmitance of the d line of the second lens combination Gr2 neutral gray negative lens satisfies condition formula (3);
0.3≤A≤0.7 (when thickness is 2mm) (3)
Transmitance formula is: T=A (D/2) (4)
Wherein,
A: the transmitance of the d line (wavelength is 587.56nm) when the thickness of neutral gray glass is 2mm.
D: the thickness of neutral gray glass.
T: the d line transmitance that thickness is corresponding.
If exceed the upper limit of conditional (1), the dioptric of neutral gray negative lens is spent by force, although the soft and graceful easy realization of afocal, but the edge thickness of eyeglass is blocked up, cause the transmitance of camera lens too low, light is partially dark, if exceed the lower limit of conditional (1), although the transmitance of camera lens is fine, the hot spot just very difficult realization that afocal is soft and graceful.
If exceed the upper limit of conditional (2), so the dioptric of the first lens combination is spent weak, the length of camera lens will be very large, volume becomes large, and focusing stroke also can lengthen, and is unfavorable for miniaturization, if exceed the lower limit of conditional (2), although favourable to miniaturization, aberration correction relative difficulty, is unfavorable for high performance.
If exceed the upper limit of conditional (3), the transmitance of the first mirror neutral gray glass is too high, reach the effect that afocal is soft and graceful, it is strong that the diopter of neutral gray negative lens just needs very, be unfavorable for the rectification of processing and differing, if exceed the lower limit of conditional (3), although be easy to the effect realizing the soft and graceful hot spot of afocal, but the transmitance of camera lens will be on the low side, cause very dark.
Compared with prior art, the invention has the beneficial effects as follows: this camera has miniaturization, high-performance, sharp keen in burnt, the feature that afocal is soft and graceful; One-piece construction is simple, practical, is easy to promote the use of.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is first embodiment of the present invention structural representation;
Fig. 3 is the transmitance chart of neutral gray negative lens A of the present invention from center to edge;
Fig. 4 is the second structural representation of the present invention;
Fig. 5 is infinite distance of the present invention, spherical aberration during maximum photography multiplying power, curvature of field aberration, distortion aberration and ratio chromatism, structural representation;
Fig. 6 is the transmitance structural representation of neutral gray negative lens A of the present invention from center to edge.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Figure of description,
As shown in Figure 1, the phtographic lens of the 1st embodiment comprises successively from object side, the first lens combination Gr1 of positive diopter, the second lens combination Gr2 composition of positive diopter.The most object end of second lens combination Gr2, configuration cut off diaphragm ST1, the second lens combination inside configuration aperture diaphragm ST2, configures neutral negative lens A between cut off diaphragm ST1 and aperture diaphragm.
The infinite distance of the 1st embodiment, spherical aberration during maximum photography multiplying power, curvature of field aberration, distortion aberration and ratio chromatism, are as shown in Figure 2.
The transmitance chart of neutral gray negative lens A from center to edge as shown in Figure 3.
The data of the 1st embodiment are as follows.
R (mm): the radius-of-curvature in each face
D (mm): each eyeglass interval and lens thickness
The refractive index of each glass of Nd:d line
Vd: the Abbe number of glass
Focal length: 102.2630
Fno：2.05
Half draws angle ω: 11.92
(the second embodiment)
As shown in Figure 4, the phtographic lens of the 1st embodiment comprises successively from object side, the first lens combination Gr1 of positive diopter, the second lens combination Gr2 composition of positive diopter.The most object end of second lens combination Gr2, configuration cut off diaphragm ST1, the second lens combination inside configuration aperture diaphragm ST2, configures neutral negative lens A between cut off diaphragm ST1 and aperture diaphragm.
The infinite distance of the 1st embodiment, spherical aberration during maximum photography multiplying power, curvature of field aberration, distortion aberration and ratio chromatism, are as shown in Figure 5.
The transmitance chart of neutral gray negative lens A from center to edge as shown in Figure 6;
The data of the 2nd embodiment are as follows.
R (mm): the radius-of-curvature in each face
D (mm): each eyeglass interval and lens thickness
The refractive index of each glass of Nd:d line
Vd: the Abbe number of glass
Focal length: 102.9943
Fno：2.05
Half draws angle ω: 11.82
(conditional conclusive table)
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (3)
1. a Novel photographic camera lens, it is characterized in that: the first lens combination Gr1 comprising positive diopter from object side to image planes side successively, second lens combination Gr2 of positive diopter, cut off diaphragm ST1 is configured between the first lens combination Gr1 and the second lens combination Gr2, at the second lens combination inside configuration aperture diaphragm ST2, between cut off diaphragm ST1 and aperture diaphragm ST2, configuration neutral gray bears diopter lens A, thing object is from infinite distance to when closely moving, the first above-mentioned lens combination Gr1 and the second lens combination Gr2 moves to object space, realize focus, and the phtographic lens satisfied the following conditional expression,
0.5≤|F/FA|≤2.5 (1)
Wherein,
F: during infinity, the focal length of whole optical system;
The focal length of the FA: the second lens combination neutral gray negative lens A.
2. phtographic lens according to claim 1, is characterized in that, the formula that satisfies condition (2);
1≤|F1/F2|≤4 (2)
Wherein,
The focal length of the F1: the first lens combination Gr1;
The focal length of the F2: the second lens combination Gr2.
3. micro-lens according to claim 1 and 2, the transmitance of the d line of the second lens combination Gr2 neutral gray negative lens satisfies condition formula (3);
0.3≤A≤0.7 (when thickness is 2mm) (3)
Transmitance formula is: T=A (D/2) (4)
Wherein,
A: the transmitance of the d line (wavelength is 587.56nm) when the thickness of neutral gray glass is 2mm;
D: the thickness of neutral gray glass;
T: the d line transmitance that thickness is corresponding.
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| CN201510417065.0A CN104991330B (en) | 2015-07-13 | 2015-07-13 | A kind of novel photographic camera lens |
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| CN104991330A true CN104991330A (en) | 2015-10-21 |
| CN104991330B CN104991330B (en) | 2017-10-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168708A (en) * | 2016-08-12 | 2016-11-30 | 安徽长庚光学科技有限公司 | A kind of shifting axle teleconverter lens |
| CN112987143A (en) * | 2021-03-29 | 2021-06-18 | 维沃移动通信有限公司 | Lens, camera module and electronic equipment |
| CN112987144A (en) * | 2021-03-29 | 2021-06-18 | 维沃移动通信有限公司 | Lens, camera module and electronic equipment |
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| EP2290440A1 (en) * | 2009-08-25 | 2011-03-02 | Ricoh Company, Ltd. | Imaging optical system with a neutral density filter, camera and personal digital assistant |
| US20110176215A1 (en) * | 2010-01-20 | 2011-07-21 | Nikon Corporation | Imaging lens, optical apparatus equipped therewith, and method for manufacturing imaging lens |
| EP2407809A1 (en) * | 2010-07-14 | 2012-01-18 | Canon Kabushiki Kaisha | Fisheye zoom lens system |
| US20130201370A1 (en) * | 2012-02-06 | 2013-08-08 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| CN205049800U (en) * | 2015-07-13 | 2016-02-24 | 安徽长庚光学科技有限公司 | Novel photographic lens |
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2015
- 2015-07-13 CN CN201510417065.0A patent/CN104991330B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003255438A (en) * | 2002-02-28 | 2003-09-10 | Canon Inc | Zoom lens and optical equipment having the same |
| JP2005345970A (en) * | 2004-06-07 | 2005-12-15 | Canon Inc | Zoom lens and imaging apparatus having the same |
| CN101276037A (en) * | 2007-03-30 | 2008-10-01 | 三洋电机株式会社 | Photographing lens unit including plurality of lenses and imaging apparatus with the same |
| EP2290440A1 (en) * | 2009-08-25 | 2011-03-02 | Ricoh Company, Ltd. | Imaging optical system with a neutral density filter, camera and personal digital assistant |
| US20110176215A1 (en) * | 2010-01-20 | 2011-07-21 | Nikon Corporation | Imaging lens, optical apparatus equipped therewith, and method for manufacturing imaging lens |
| EP2407809A1 (en) * | 2010-07-14 | 2012-01-18 | Canon Kabushiki Kaisha | Fisheye zoom lens system |
| US20130201370A1 (en) * | 2012-02-06 | 2013-08-08 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
| CN205049800U (en) * | 2015-07-13 | 2016-02-24 | 安徽长庚光学科技有限公司 | Novel photographic lens |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168708A (en) * | 2016-08-12 | 2016-11-30 | 安徽长庚光学科技有限公司 | A kind of shifting axle teleconverter lens |
| CN106168708B (en) * | 2016-08-12 | 2019-03-08 | 安徽长庚光学科技有限公司 | A kind of shifting axis teleconverter lens |
| CN112987143A (en) * | 2021-03-29 | 2021-06-18 | 维沃移动通信有限公司 | Lens, camera module and electronic equipment |
| CN112987144A (en) * | 2021-03-29 | 2021-06-18 | 维沃移动通信有限公司 | Lens, camera module and electronic equipment |
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|---|---|
| CN104991330B (en) | 2017-10-20 |
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