USRE30592EExpiredUtility
Large aperture extended range zoom lens
Priority: Jan 23, 1978Filed: Jan 23, 1978Granted: Apr 28, 1981
Est. expiryJan 23, 1998(expired)· nominal 20-yr term from priority
G02B 15/22
1
PatentIndex Score
1
Cited by
6
References
1
Claims
Abstract
Disclosed is an optical design for a variable focal length lens of large effective aperture which is focusable over an extended range including the "macro" range and is provided with a high degree of correction.
Claims
exact text as granted — not AI-modifiedWhat I claim is:
1. An optical system for a variable focal length lens of large effective aperture, which is focusable over an extended range, having substantially the following specification: ______________________________________
SYSTEM ELF HALF ANGLE OF FIELD
at W/A = 7.22mm (.2835 in.)
27.36°
at T/P = 43.86mm (1.7268 in.)
4.46°
at MID = 19.25mm (.7579)
10.02°
Thickness
Lens Radii(mm.) (mm.) Spacings(mm)
N.sub.D
V
______________________________________
1 R.sub.1 =166.0901
T.sub.1 =1.702 1.755
27.6
R.sub.2 =-45.7200 S.sub.1 =0
2 R.sub.3 =45.7200
T.sub.2 =11.430 1.623
56.9
R.sub.4 =233.4001 S.sub.2 =.1016
3 R.sub.5 =50.3428
T.sub.3 =7.112 1.651
56.2
R.sub.6 =-301.7523 S.sub.3 =
1.4910 at W/A
27.1882 at T/P
17.7851 at MID
4 R.sub.7 =70.3580
T.sub.4 =0.800 1.639
55.4
R.sub.8 =-16.8656 S.sub.4 =6.584
5 R.sub.9 =-24.0030
T.sub.5 =0.800 1.620
60.3
R.sub.10 =-10.1008 S.sub.5 =0
6 R.sub.11 =19.1008
T.sub.6 =3.556 1.785
25.7
R.sub.12 =-59.9948 S.sub.6 =
38.3210 at W/A
2.7508 at T/P
17.1018 at MID
7 R.sub.13 =53.9750
T.sub.7 =0.800 1.805
25.4
R.sub.14 =-21.3106 S.sub.7 =0
8 R.sub.15 =21.3106
T.sub.8 =5.121 1.640
60.2
R.sub.16 =31.6230 S.sub.8 =.1016
9 R.sub.17 =23.2664
T.sub.9 =3.150 1.691
54.8
R.sub.18 =-101.5237 S.sub.9 =
1.7348 at W/A
11.6103 at T/P
6.6573 at MID
10 R.sub.19 =-45.5168
T.sub.10 =0.711 1.691
54.8
R.sub.20 =-12.8016 S.sub.10 =2.2758
11 R.sub.21 =14.6431
T.sub.11 =2.091 1.805
25.4
R.sub.22 =-27.4320 S.sub.11 =10.668
STOP - - -
S.sub.12 =2.556
12 R.sub.23 =17.2720
T.sub.12 =3.226 1.774
44.8
R.sub.24 =30.4292 S.sub.13 =1.6764
13 R.sub.25 =-19.3040
T.sub.13 =0.711 1.805
25.4
R.sub.26 =-17.1196 S.sub.14 =.8890
14 R.sub.27 =173.1519
T.sub.14 =4.496 1.805
25.4
R.sub.28 =-16.5100 S.sub.15 =0
15 R.sub.29 =16.5100
T.sub.15 =2.794 1.744
44.8
R.sub.30 =21.8034 S.sub.16 =.1270
16 R.sub.31 =14.9758
T.sub.16 =3.023 1.734
51.5
R.sub.32 =-424.1817 S.sub.17 =11.277
BFL
______________________________________
wherein the first column lists the lens elements numerically starting at the ray entrance side of the system; the second column lists the respective base radii R 1 to R 32 ; the third column lists the thicknesses T 1 -T 16 of the respective elements; the fourth column lists the axial spacings S 1 to S 17 between the respective elements, and stop, and the image plane; and the fifth and sixth columns respectively list the index of refraction for the Sodium D line N D and the dispersive index V of the optical materials of the respective elements. .[.2. An optical system for a variable focal length lens of large effective aperture, which is focusable over an extended range, having substantially the following specification: __________________________________________________________________________
.[.SYSTEM EFL HALF ANGLE OF FIELD
at W/A = 7.61mm (.2997 in.)
25.35°
at T/P = 56.98mm (2.2433 in.)
3.31°
at MID = 25.67mm (1.0105 in.)
7.58°
LENS
RADII (mm.)
THICKNESS (mm.)
SPACINGS (mm)
N.sub.D
V
__________________________________________________________________________
1 R.sub.1 = 240.7589
R.sub.2 = -51.1988
T.sub.1 = 1.6510 1.755
27.6
S1 = 0
2 R.sub.3 = 51.1988
R.sub.4 = 152.7810
T.sub.2 = 12.7000 1.620
60.4
S.sub.2 = .1016
3 R.sub.5 = 43.6880
R.sub.6 = -139.7000
T.sub.3 = 7.7978 1.651
55.9
S.sub.3 = 4.2875 at W/A
29.5554 at T/P
22.3952 at MID
4 R.sub.7 = 71.7550
R.sub. 8 = -16.5100
T.sub.4 = .8128 1.639
55.4
S.sub.4 = 6.6294
5 R.sub.9 = -24.0030
R.sub.10 = -19.1008
T.sub.5 = .8382 1.620
60.4
S.sub.5 = 0
6 R.sub.11 = 19.1008
R.sub.12 = -59.9948
T.sub.6 = 3.5052 1.785
25.8
S.sub.6 = 38.4048 at W/A
2.5857 at T/P
14.2570 at MID
7 R.sub.13 = 58.9280
R.sub.14 = -21.7424
T.sub.7 = .8890 1.805
25.4
S.sub.7 = 0
8 R.sub.15 = 21.7424
R.sub.16 = 30.2260
T.sub.8 = 5.6388 1.641
60.1
S.sub.8 = .1016
9 R.sub.17 = 22.7203
R.sub.18 = 93.1672
T.sub.9 = 3.1496 1.691
54.9
S9 = 1.6002 at W/A
12.1514 at T/P
7.6403 at MID
10 R.sub.19 = -45.5168
R.sub.20 = -12.8016
T.sub.10 = .7112 1.691
54.9
S.sub.10 = 2.2352
11 R.sub.21 = 16.6431
T.sub.11 = 2.0574 1.805
25.4
R.sub.22 = -27.0256 S.sub.11 = 11.0490
STOP
S.sub.12 = 3.5560
12 R.sub.23 = 18.0848
R.sub.24 = 32.8168
T.sub.12 = 3.6576 1.744
44.8
S.sub.13 = 1.6002
13 R.sub.25 = -21.9202
R.sub.26 = -16.8656
T.sub.13 = .7112 1.805
25.4
S.sub.14 = .7336
14 R.sub.27 = 61.2140
R.sub.28 = -14.5288
T.sub.14 = 4.3180 1.805
25.4
S.sub.15 = 0
15 R.sub.29 = 14.5288
R.sub.30 = 26.9494
T.sub.15 = 3.2512 1.744
44.8
S.sub.16 = .1270
16 R.sub.31 = 14.7320
R.sub.32 = -463.9259
T.sub.16 = 2.5654 1.734
51.7
S.sub.17 = 11.4529.].
__________________________________________________________________________
wherein the first column lists the lens elements numerically starting at
the ray entrance side of the system; the second column lists the
respective base radii R.sub.1 to R.sub.32 ; the third column lists the
thicknesses T.sub.1 -T.sub.16 of the respective elements; the fourth
column lists the axial spacings S.sub.1 to S.sub.17 between the respective
elements, and stop, and the image plane; and the fifth and sixth columns
respectively list the index of refraction for the Sodium D line N.sub.D
and the dispersive index V of the optical materials of the respective
elements..]. .Iadd.3. An optical system for a variable focal length lens which is focusable over an extended range defined by a first range portion for normal object distances and a second range portion for shorter object distances, said optical system comprising: a focusing component including first and second elements arranged into a positive doublet, and a positive third element; a variator component including a negative fourth element, and fifth and sixth elements arranged into a negative doublet; a compensator component including seventh and eighth elements arranged into a positive doublet, and a positive ninth element; a collimator component including a negative tenth element, and a positive eleventh element; and a prime lens component including a positive twelfth element, a negative thirteenth element, fourteenth and fifteenth elements arranged into a positive doublet, and a positive sixteenth element; all of said elements being located on a common optical axis and following one another in the order set forth; said focusing component being movable for focusing said optical system over said first range portion; said variator component being movable for variation of the focal length of said optical system; said compensator component being movable relative to said variator component for focusing of said optical system over said second
range portion..Iaddend. .Iadd.4. An optical system for a variable focal length lens which is focusable over an extended range defined by a first range portion for normal object distances and a second range portion for shorter object distances, said optical system comprising: a focusing component including first and second elements arranged into a positive doublet, said first element being a negative meniscus and said second element being biconvex, and a positive meniscus third element; a variator component including a negative meniscus fourth element, and fifth and sixth elements arranged into a negative doublet, said fifth element being biconcave and said sixth element being a positive meniscus; a compensator component including seventh and eighth elements arranged into a positive doublet, said seventh element being a negative meniscus and said eighth element being biconvex, and a positive meniscus ninth element; a collimator component including a negative biconcave tenth element, and a positive meniscus eleventh element; and a prime lens component including a positive biconvex twelfth element, a negative biconcave thirteenth element, fourteenth and fifteenth elements arranged into a positive doublet, said fourteenth element being a negative meniscus and said fifteenth element being biconvex, and a positive sixteenth element; all of said elements being located on a common optical axis and following one another in the order set forth; said focusing component being movable for focusing said optical system over said first range portion; said variator component being movable for variation of the focal length of said optical system; said compensator component being movable relative to said variator component for focusing of said optical system over said second
range portion..Iaddend. .Iadd.5. An optical system for a variable focal length lens which is focusable over an extended range defined by a first range portion for normal object distances and a second range portion for shorter object distances, said optical system comprising: a focusing component including first and second elements arranged into a positive doublet, and a positive third element; a variator component including a negative fourth element, and fifth and sixth elements arranged into a negative doublet; a compensator component including seventh and eighth elements arranged into a positive doublet, and a positive ninth element; a collimator component including a negative tenth element, and a positive eleventh element; and a prime lens component including a positive twelfth element, a negative thirteenth element, fourteenth and fifteenth elements arranged into a positive doublet, and a positive sixteenth element; all of said elements being located on a common optical axis and following
one another in the order set forth. .Iaddend. .Iadd.6. An optical system for a variable focal length lens which is focusable over an extended range defined by a first range portion for normal object distances and a second range portion for shorter object distances, said optical system comprising: a focusing component including first and second elements arranged into a positive doublet, said first element being a negative meniscus and said second element being biconvex, and a positive meniscus third element; a variator component including a negative meniscus fourth element, and fifth and sixth elements arranged into a negative doublet, said fifth element being biconcave and said sixth element being a positive meniscus; a compensator component including seventh and eighth elements arranged into a positive doublet, said seventh element being a negative meniscus and said eighth element being biconvex, and a positive meniscus ninth element; a collimator component including a negative biconcave tenth element, and a positive meniscus eleventh element; and a prime lens component including a positive biconvex twelfth element, a negative biconcave thirteenth element, fourteenth and fifteenth elements arranged into a positive doublet, said fourteenth element being a negative meniscus and said fifteenth element being biconvex, and a positive sixteenth element; all of said elements being located on a common optical axis and following one another in the order set forth..Iaddend.Join the waitlist — get patent alerts
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