Wide angle zoom lens system

Claim 2

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens group, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, (4) where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the K-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens group, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 3.5 f = 1.0 - 1.46 ω = 42.0° - 31.3° Surface No. r d N υ ______________________________________ 1 2.6083 0.1464 1.58913 61.1 2 8.3382 0.0041 3 2.0830 0.0488 1.79952 42.2 first lens 4 0.6508 0.3091 group 5 13.9462 0.0529 1.67790 50.7 6 1.3168 0.1952 7 1.0677 0.1114 1.80518 25.4 8 1.9415 0.6480 9 1.7490 0.2916 1.80610 40.9 10 -6.6348 0.0907 11 0.8200 0.1041 1.80610 40.9 12 2.6537 0.0936 13 -2.3505 0.1594 1.84666 23.9 second 14 0.8293 0.0732 lens 15 -8.5416 0.0915 1.51633 64.1 group 16 -0.9506 0.0041 17 14.4470 0.0944 1.51633 64.1 18 -1.2857, ______________________________________ wherein: ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between adjacent lenses, N is the refractive index at the dline, and v is the Abbe number [.], and (8) the third surface being aspherical and its coefficients being: A 1 =0.975539×10 -2 A 2 =0.159788×10 -1 A 3 =-0.839908×10 -2 A 4 =-0.703569×10 -3

Claim 3

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens group, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, (4) where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the k-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens groups, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 3.5 f = 1.0-1.46 ω = 42.0°-31.3° Surface No. r d N υ ______________________________________ 1 2.9614 0.1422 1.58913 61.1 2 9.1414 0.0041 3 1.8778 0.0488 1.80610 40.9 first 4 0.6423 0.3088 lens 5 7.1790 0.0528 1.67790 50.7 group 6 1.2023 0.1881 7 1.1365 0.1219 1.80518 25.4 8 2.2346 0.6412 9 1.7117 0.2832 1.80610 40.9 10 -5.6534 0.0926 11 0.8377 0.1016 1.80610 40.9 12 2.6212 0.0913 second 13 -2.1878 0.1593 1.84666 23.9 lens 14 0.8525 0.0731 group 15 -8.3985 0.0914 1.51633 64.1 16 -0.9428 0.0041 17 -34.2275 0.0943 1.51633 64.1 18 -1.1567 ______________________________________ wherein: ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between the adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number, and (8) the seventh surface being aspherical and its coefficients being: A 1 =0.252119×10 -1 A 2 =0.104986 A 3 =0.200580 A 4 =-0.338823

Claim 4

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens group, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, (4) where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the k-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens groups, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 3.5 f = 1.0-1.46 ω = 42.0°-31.3° Surface No. r d N υ ______________________________________ 1 2.9614 0.1422 1.58913 61.1 2 9.1414 0.0041 3 1.8778 0.0488 1.80610 40.9 first 4 0.6423 0.3088 lens 5 7.1790 0.0528 1.67790 50.7 group 6 1.2023 0.1881 7 1.1365 0.1219 1.80518 25.4 8 2.2346 0.6412 9 1.7117 0.2832 1.80610 40.9 10 -5.6534 0.0926 11 0.8377 0.1016 1.80610 40.9 12 2.6212 0.0913 second 13 -2.1878 0.1593 1.84666 23.9 lens 14 0.8525 0.0731 group 15 -8.3985 0.0914 1.51633 64.1 16 -0.9428 0.0041 17 -34.2275 0.0943 1.51633 64.1 18 -1.1567 ______________________________________ wherein: ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between the adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number, and (8) the seventh surface being aspherical and its coefficients being: A 1 =0.252119×10 -1 A 2 =0.104986 A 3 =0.200580 A 4 =-0.338823

Claim 5

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens groups, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, (4) where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the K-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens group, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 3.5 f = 1.0-1.46 ω = 42.0°-31.3° Surface No. r d N υ ______________________________________ 1 2.9645 0.1546 1.58913 61.1 2 12.7739 0.0041 3 2.0214 0.0488 1.80610 40.9 first 4 0.6757 0.3091 lens 5 14.6011 0.0529 1.67790 50.7 group 6 1.1185 0.1737 7 1.0523 0.1114 1.80518 25.4 8 2.1592 0.6516 9 1.7350 0.3063 1.80610 40.9 10 8.4074 0.0549 11 0.8439 0.1041 1.79952 42.2 12 3.3875 0.0927 second 13 -2.3504 0.1594 1.84666 23.9 lens 14 0.8386 0.0732 group 15 -9.5985 0.0915 1.51633 64.1 16 -1.1917 0.0041 17 30.7196 0.1301 1.51633 64.1 18 -0.9926, ______________________________________ wherein: ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number [. ], and (8) the eighteenth surface being aspherical and its coefficients being: A 1 =0.634163×10 -1 A 2 =0.109390 A 3 =0.470527 A 4 =-5.122549.

Claim 6

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens groups, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, (4) where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the K-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens group, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 3.5 f = 1.0-1.46 ω = 42.0°-31.3° Surface No. r d N υ ______________________________________ 1 2.9645 0.1546 1.58913 61.1 2 12.7739 0.0041 3 2.0214 0.0488 1.80610 40.9 first 4 0.6757 0.3091 lens 5 14.6011 0.0529 1.67790 50.7 group 6 1.1185 0.1737 7 1.0523 0.1114 1.80518 25.4 8 2.1592 0.6516 9 1.7350 0.3063 1.80610 40.9 10 8.4074 0.0549 11 0.8439 0.1041 1.79952 42.2 12 3.3875 0.0927 second 13 -2.3504 0.1594 1.84666 23.9 lens 14 0.8386 0.0732 group 15 -9.5985 0.0915 1.51633 64.1 16 -1.1917 0.0041 17 30.7196 0.1301 1.51633 64.1 18 -0.9926, ______________________________________ wherein: ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number [. ], and (8) the eighteenth surface being aspherical and its coefficients being: A 1 =0.634163×10 -1 A 2 =0.109390 A 3 =0.470527 A 4 =-5.122549.

Claim 7

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens group, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the K-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens group, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 4.0 f = 1.0 1.40 ω = 3°-37.7° Surface No. r d N υ ______________________________________ 1 2.5388 0.2441 1.48749 70.1 2 6.5644 0.0049 3 1.6844 0.0879 1.80400 46.6 first 4 0.6835 0.4150 lens 5 -9.7648 0.0732 1.80400 46.6 group 6 1.2853 0.1992 7 1.3068 0.1367 1.80518 25.4 8 3.8921 0.5273 9 6.6455 0.2529 1.83400 37.2 10 -2.7428 0.1270 11 1.6557 0.1499 1.83400 37.2 12 27.9064 0.0859 13 -0.9111 0.1445 1.84666 23.9 14 -1.6620 0.0327 second 15 -2.4266 0.1108 1.50048 65.9 lens 16 -1.1002 0.0273 group 17 -16.1119 0.1382 1.84666 23.9 18 1.4403 0.0923 19 -5.2884 0.1465 1.50048 65.9 20 -0.9789 0.0049 21 4.5065 0.1465 1.51821 65.0 22 -2.2867 ______________________________________ ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number, and (8) the third surface being aspherical and its coefficients being: A 1 =0.409896×10 -1 A 2 =0.593034×10 -2 A 3 =-0.167327×10 -1 A 4 =0.157683×10 -1 .

Claim 8

A miniaturized, super-wide angle zoom lens system, comprising: (a) a first divergent lens group having at least two positive and two negative lenses and including, in order from the object side, a positive lens having a convex surface facing the object, a negative lens group, and a positive meniscus lens having a convex surface facing the object, and (b) a second convergent lens group having at least two positive lenses on each end facing both the object and the image, (c) a surface of a single one of the lenses in the system being aspherical, and (d) the overall lens system satisfying the following conditions: f.sub.W <|f.sub.1 |<1.5 f.sub.T, (1) 0.4<l.sub.W /f.sub.W <1.0, (2) 3.0<L/f.sub.W <6.0, (3) if K=i or j (the K-th surface is aspherical), 0<|φ.sub.K |<0.35, where: φ i >0 and φ j <0, 0<|h.sub.WK.sup.2 h.sub.WK.spsp.2 φ.sub.K |<0.2, (5) -0.2<h.sub.WK h.sub.WK.spsp.3 φ.sub.K <0, (6) wherein: f 1 is the focal length of the first lens group, f W is the focal length in the wide angle position, f T is the focal length in the telescopic or narrow angle position, l W is the distance between the first and second lens groups in the wide angle position, L is the maximum overall length, φ K is the solid or cubic aspherical coefficient, h WK is the height of the parallel light beam near the optical axis passing through the K-th surface in the wide angle position and limited by the stop diaphragm, h WK is the height of the angled light beam passing through the center of the stop diaphragm in the wide angle position in the K-th lens surface, i is the i-th surface when the aspherical surface is in the first lens group, and j is the j-th surface when the aspherical surface is in the second lens group, ______________________________________ (7) 1 : 4.0 f = 1.0 1.40 ω = 3°-37.7° Surface No. r d N υ ______________________________________ 1 2.5388 0.2441 1.48749 70.1 2 6.5644 0.0049 3 1.6844 0.0879 1.80400 46.6 first 4 0.6835 0.4150 lens 5 -9.7648 0.0732 1.80400 46.6 group 6 1.2853 0.1992 7 1.3068 0.1367 1.80518 25.4 8 3.8921 0.5273 9 6.6455 0.2529 1.83400 37.2 10 -2.7428 0.1270 11 1.6557 0.1499 1.83400 37.2 12 27.9064 0.0859 13 -0.9111 0.1445 1.84666 23.9 14 -1.6620 0.0327 second 15 -2.4266 0.1108 1.50048 65.9 lens 16 -1.1002 0.0273 group 17 -16.1119 0.1382 1.84666 23.9 18 1.4403 0.0923 19 -5.2884 0.1465 1.50048 65.9 20 -0.9789 0.0049 21 4.5065 0.1465 1.51821 65.0 22 -2.2867 ______________________________________ ω is the halfviewing angle, r is the radius of curvature, d is the thickness of the lens or the distance between adjacent lenses, N is the refractive index at the dline, and υ is the Abbe number, and (8) the third surface being aspherical and its coefficients being: A 1 =0.409896×10 -1 A 2 =0.593034×10 -2 A 3 =-0.167327×10 -1 A 4 =0.157683×10 -1 .