Slr camera super large aperture wide-angle lensTechnical field
The present invention relates to slr camera wide-angle lens field, in particular a kind of specification is the digital single-lens reflex camera super large aperture full width camera lens of 35mmF1.2.
Background technology
In digital camera equipment, there is certain vacancy in the production of domestic camera lens design, and along with the raising of the development of camera work and people's living standard, shutterbugs' increasing number, the demand of this respect also increases therewith.In existing full width lens design, such as the 35mm camera lens of the manufacturer production such as Nikon, Canon, suitable horse, maximum ring only has F1.4, and all used aspherical lens above, on the high side, cost performance is low, is a heavy financial burden to vast commonness photograph fan.
Therefore, prior art existing defects, it is necessary to improve.
Summary of the invention
The technical problem to be solved is: provide one can revise various aberration, compact conformation, imaging effect good, and long back focal length is less costly, the slr camera super large aperture wide-angle lens that cost performance is high.
Technical scheme is as follows: a kind of slr camera super large aperture wide-angle lens, including an optical lens, this optical lens is sequentially comprised to image side by thing side: have the first lens of negative power, and its thing side is convex surface, including the first convex surface sphere and the second concave surface sphere；Having the second lens of negative power, its thing side is concave surface, including the 3rd concave surface sphere and the 4th concave surface sphere；Having the 3rd lens of positive light coke, its thing side is plane, including the 5th plane sphere and the 6th convex surface sphere；Having the 4th lens of positive light coke, its thing side is convex surface, including the 7th convex surface sphere and the 8th convex surface sphere；Having the 5th lens of positive light coke, its thing side is convex surface, including the 9th convex surface sphere and the tenth concave surface sphere；Having the 6th lens of negative power, its thing side is convex surface, including the 11st convex surface sphere and the 12nd concave surface sphere；Having the 7th lens of negative power, its thing side is concave surface, including the 13rd concave surface sphere and the 14th concave surface sphere；Having the 8th lens of positive light coke, its thing side is convex surface, including the 15th convex surface sphere and the 16th convex surface sphere；Having the 9th lens of positive light coke, its thing side is convex surface, including the 17th convex surface sphere and the 18th convex surface sphere；Having the tenth lens of negative power, its thing side is convex surface, including the 19th convex surface sphere and the 20th concave surface sphere；Having the 11st lens of positive light coke, its thing side is convex surface, including the 21st convex surface sphere and the 22nd convex surface sphere.
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, the 14th concave surface sphere of the 7th lens and the 15th convex surface spherical shape of the 8th lens are corresponding, and mutually glued.
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, it meets 0.5 < EFL/H < 1, and wherein EFL is the effective focal length of system, and H is imaging surface size；Further, the first lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；Second lens meet: 1.55 < n < 1.7,40 < λ < 50, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；3rd lens meet: 1.65 < n < 1.85,30 < λ < 45, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；4th lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；5th lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；6th lens meet: 1.5 < n < 1.75,55 < λ < 70, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；7th lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；8th lens meet: 1.4 < n < 1.6,75 < λ < 90, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；9th lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；Tenth lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；11st lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass.
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, the parameter of each lens is:
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, its system parameter setting is: TTL=135.5；EFL=35.7；H=43.2；F/#=1.23, wherein, TTL is overall length, and EFL is effective focal length, and H is imaging surface size, and F/# is aperture-coefficient size, for the inverse of relative aperture.
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, it is digital single-lens reflex camera super large aperture full width camera lens that specification is 35mmF1.2.
Being applied to technique scheme, in described slr camera super large aperture wide-angle lens, the first lens preferentially adopt the glass material of Chengdu light Photoelectric Co., Ltd. to the 11st lens.
Adopt such scheme, the present invention by arranging 11 lens, the convenient light receiving greater angle of the first lens, be beneficial to shortening focal length, can also allow after optics burnt elongated simultaneously；Second lens can undertake the negative power of a part of first lens, allows the first lens shape can be gently, it is easy to processing；3rd lens, for assembling the light that front two panels receives, undertake the positive light coke of a part the 4th lens simultaneously, also make the 4th lens shape mild, convenient processing；Four to nine lens constitute the distressed structure of double gauss, then in order to increase the aperture of whole system and eliminate part aberration, the glue pellet of the 7th lens and the 8th lens composition can color difference eliminating better；Tenth lens and the 11st lens, for eliminating remaining aberration as far as possible, reduce rear group of eyeglass bore, produce certain symmetry with front group, it is possible to conveniently eliminate distortion simultaneously；Whole optical system is closely, it does not have other redundant spaces, it is possible to revising various aberration, compact conformation, effect effective, long back focal length, less costly, cost performance is high.
Accompanying drawing explanation
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the axle colouring dygoram of the present invention；
Fig. 3 is the astigmatism curve chart of the present invention；
Fig. 4 is the distortion curve figure of the present invention；
Fig. 5 is the relative illumination curve chart of the present invention；
Fig. 6 is modulation transfer functions (MTF) curve chart of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Present embodiments provide a kind of slr camera super large aperture wide-angle lens, as shown in Figure 1, slr camera super large aperture wide-angle lens includes an optical lens, this optical lens is sequentially comprised to image side by thing side: have the first lens 1 of negative power, the thing side of the first lens 1 is convex surface, and the first lens 1 include the first convex surface sphere and the second concave surface sphere；Having the second lens 2 of negative power, the thing side of the second lens 2 is concave surface, and the second lens 2 include the 3rd concave surface sphere and the 4th concave surface sphere；Having the 3rd lens 3 of positive light coke, the thing side of the 3rd lens 3 is plane, the 3rd lens 3 include the 5th plane sphere and the 6th convex surface sphere；Having the 4th lens 4 of positive light coke, the thing side of the 4th lens 4 is convex surface, and the 4th lens 4 include the 7th convex surface sphere and the 8th convex surface sphere；Having the 5th lens 5 of positive light coke, the thing side of the 5th lens 5 is convex surface, and the 5th lens 5 include the 9th convex surface sphere and the tenth concave surface sphere；Having the 6th lens 6 of negative power, the thing side of the 6th lens 6 is convex surface, and the 6th lens 6 include the 11st convex surface sphere and the 12nd concave surface sphere；Having the 7th lens 7 of negative power, the thing side of the 7th lens 7 is concave surface, and the 7th lens 7 include the 13rd concave surface sphere and the 14th concave surface sphere；Having the 8th lens 8 of positive light coke, the thing side of the 8th lens 8 is convex surface, and the 8th lens 8 include the 15th convex surface sphere and the 16th convex surface sphere；Having the 9th lens 9 of positive light coke, the thing side of the 9th lens 9 is convex surface, and the 9th lens 9 include the 17th convex surface sphere and the 18th convex surface sphere；Having the tenth lens 10 of negative power, the thing side of the tenth lens 10 is convex surface, and the tenth lens 10 include the 19th convex surface sphere and the 20th concave surface sphere；Having the 11st lens 11 of positive light coke, the thing side of the 11st lens 11 is convex surface, and the 11st lens 11 include the 21st convex surface sphere and the 22nd convex surface sphere.
Diaphragm 13 is arranged on the 6th lens 6 and the 7th lens 7, is image planes 12 before this optical lens, and, the first lens to the 11st lens select material time, it is possible to prioritizing selection adopt Chengdu light Photoelectric Co., Ltd. glass material.
Wherein, the first lens 1 are the meniscus lens that negative light is burnt, and the convenient light receiving greater angle is beneficial to shortening focal length, can also allow after optics burnt elongated simultaneously；Second lens 2 are biconcave lens, and the second lens 2 can undertake the negative power of a part of first lens 1, allow the first lens 1 shape can be gently, it is easy to processing；3rd lens 3, for assembling the light that front two panels receives, undertake the positive light coke of a part the 4th lens 4 simultaneously, also make the 4th lens 4 shape mild, convenient processing.
4th lens the 4, the 5th lens the 5, the 6th lens the 6, the 7th lens the 7, the 8th lens 8 and the 9th lens 9 constitute the distressed structure of double gauss, then in order to increase the aperture of whole system and eliminate part aberration, and, 14th concave surface sphere of the 7th lens 7 and the 15th convex surface spherical shape of the 8th lens 8 are corresponding, and it is mutually glued, so, the glue pellet of the 7th lens 7 and the 8th lens 8 composition can color difference eliminating better；Tenth lens the 10 and the 11st lens 11, for eliminating remaining aberration as far as possible, reduce rear group of eyeglass bore, produce certain symmetry with front group, it is possible to conveniently eliminate distortion simultaneously；Whole optical system is closely, it does not have other redundant spaces.
Or, wherein, the system of this optical lens meets 0.5 < EFL/H < 1, and wherein EFL is the effective focal length of system, and H is imaging surface size；Further, the first lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；Second lens meet: 1.55 < n < 1.7,40 < λ < 50, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；3rd lens meet: 1.65 < n < 1.85,30 < λ < 45, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；4th lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；5th lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；6th lens meet: 1.5 < n < 1.75,55 < λ < 70, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；7th lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；8th lens meet: 1.4 < n < 1.6,75 < λ < 90, and wherein n is the refractive index of glass, and λ is the Abbe number of glass.9th lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；Tenth lens meet: 1.6 < n < 1.85,23 < λ < 35, and wherein n is the refractive index of glass, and λ is the Abbe number of glass；11st lens meet: 1.6 < n < 1.8,45 < λ < 60, and wherein n is the refractive index of glass, and λ is the Abbe number of glass.
And it is possible to by the system parameter setting of optical texture be: TTL=135.5；EFL=35.7；H=43.2；F/#=1.23, wherein, TTL is overall length, and EFL is effective focal length, and H is imaging surface size, and F/# is aperture-coefficient size, for the inverse of relative aperture.
The parameter of each lens such as following table:
So, this optical lens is set to the digital single-lens reflex camera super large aperture full width camera lens that specification is 35mmF1.2；On its axle, chromatic curve, astigmatism curve, distortion curve, relative illumination curve chart and modulation transfer functions (MTF) curve are as shown in figures 2-6, and digital single-lens reflex camera super large aperture full width camera lens has revises various aberrations, compact conformation, imaging effect is good, the angle of visual field is big, long back focal length, cost performance are high advantage.
These are only presently preferred embodiments of the present invention, be not limited to the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.