Wide angle objective having a non-spherical surface

Claim 2

A wide angle objective optical system comprising a lens system wherein the first surface of the system is configured in a non-spherical form and is represented by the formula ##EQU3## wherein X : the abscissa taken along the optical axis in the direction of incoming light, Y : the ordinate perpendicular to the abscissa, R 1 : the radius of curvature of the non-spherical surface at the vertex of the optical axis and wherein the optical elements have the following data: f = 14.300 Fn o = 2.8

Claim 3

ω = 114. 2° ______________________________________ No. R D Nd υd ______________________________________ 1 258.12900* 5.00000 1.60311 60.7 2 29.28800 22.65400 3 78.02500 2.50000 1.77250 49.6 4 24.55600 12.42500 5 43.10800 7.00000 1.72151 29.2 6 78.36300 8.74400 1.62041 60.3 7 ∞ 1.50000 ##STR1## ∞ ∞ 1.80000 0.50000 1.51633 64.1 10 24.56600 1.50000 1.77250 49.6 11 13.65000 1.50000 12 18.16500 14.64000 1.48749 70.1 13 -19.15600 3.00000 14 -18.53300 2.50000 1.62041 60.3 15 15.85200 3.00000 1.72151 29.2 16 -303.07100 1.00000 17 -33.46500 1.00000 1.92286 20.9 18 29.20100 7.00000 1.48749 70.1 19 -15.92400 0.10000 20 82.10500 5.80000 1.77250 49.6 21 -35.13000 Σ.sub.D = 103.16300 b,f = 36,497 ______________________________________ R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y K ______________________________________ 0. 0. 2.00000 0.00780 4.00000 0.03189 6.00000 0.07426 8.00000 0.13818 10.00000 0.22805 12.00000 0.34931 14.00000 0.50824 16.00000 0.71177 18.00000 0.96733 20.00000 1.28269 22.00000 1.66578 24.00000 2.12471 26.00000 2.66780 28.00000 3.30377 30.00000 4.04215 32.00000 4.89395 34.00000 5.87262 36.00000 6.99547 38.00000 8.28552 40.00000 9.77407 42.00000 11.50391 44.00000 13.53344 ______________________________________

Claim 4

ω = 114. 2° ______________________________________ No. R D Nd υd ______________________________________ 1 258.12900* 5.00000 1.60311 60.7 2 29.28800 22.65400 3 78.02500 2.50000 1.77250 49.6 4 24.55600 12.42500 5 43.10800 7.00000 1.72151 29.2 6 78.36300 8.74400 1.62041 60.3 7 ∞ 1.50000 ##STR1## ∞ ∞ 1.80000 0.50000 1.51633 64.1 10 24.56600 1.50000 1.77250 49.6 11 13.65000 1.50000 12 18.16500 14.64000 1.48749 70.1 13 -19.15600 3.00000 14 -18.53300 2.50000 1.62041 60.3 15 15.85200 3.00000 1.72151 29.2 16 -303.07100 1.00000 17 -33.46500 1.00000 1.92286 20.9 18 29.20100 7.00000 1.48749 70.1 19 -15.92400 0.10000 20 82.10500 5.80000 1.77250 49.6 21 -35.13000 Σ.sub.D = 103.16300 b,f = 36,497 ______________________________________ R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y K ______________________________________ 0. 0. 2.00000 0.00780 4.00000 0.03189 6.00000 0.07426 8.00000 0.13818 10.00000 0.22805 12.00000 0.34931 14.00000 0.50824 16.00000 0.71177 18.00000 0.96733 20.00000 1.28269 22.00000 1.66578 24.00000 2.12471 26.00000 2.66780 28.00000 3.30377 30.00000 4.04215 32.00000 4.89395 34.00000 5.87262 36.00000 6.99547 38.00000 8.28552 40.00000 9.77407 42.00000 11.50391 44.00000 13.53344 ______________________________________

Claim 5

A wide angle objective optical system comprising a lens system wherein the first surface of the system is configured in a non-spherical form and is represented by the formula ##EQU4## wherein X : the abscissa taken along the optical axis in the direction of incoming light, Y : the ordinate perpendicular to the abscissa, R 1 : the radius of curvature of the non-spherical surface at the vertex of the optical axis and wherein the optical elements have the following data: f = 14.3 Fn o = 2.8

Claim 6

A wide angle objective optical system comprising a lens system wherein the first surface of the system is configured in a non-spherical form and is represented by the formula ##EQU4## wherein X : the abscissa taken along the optical axis in the direction of incoming light, Y : the ordinate perpendicular to the abscissa, R 1 : the radius of curvature of the non-spherical surface at the vertex of the optical axis and wherein the optical elements have the following data: f = 14.3 Fn o = 2.8

Claim 7

ω = 114. 20° ______________________________________ No. R D Nd νd ______________________________________ 1 141.395* 5.000 1.60311 60.7 2 31.477 22.770 3 61.359 6.000 1.72151 29.2 4 936.733 2.500 1.77250 49.6 5 27.667 8.466 6 80.973 5.000 1.80518 25.4 7 -88.739 5.958 1.64328 47.9 8 ∞ 1.500 9 ∞ 1.800 1.51633 64.1 T 10 ∞ 0.500 11 20.662 1.000 1.77250 49.6 12 9.627 3.000 13 16.950 13.432 1.48749 70.1 14 -14.296 3.000 15 -28.095 2.870 1.62041 60.3 16 21.179 2.500 1.72151 29.2 17 89.099 1.000 18 -36.119 1.000 1.84666 23.9 19 28.905 7.000 1.48749 70.1 20 -16.098 0.100 21 66.585 5.800 1.77250 49.6 22 -41.712 ______________________________________ +93 D = 100.196 b, f = 3.6500 wherein the symbols have the following meaning: R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y X ______________________________________ 0. 0. 2.00000 0.01419 4.00000 0.5723 6.00000 0.13060 8.00000 0.23665 10.00000 0.37861 12.00000 0.56040 14.00000 0.78661 16.00000 1.06233 18.00000 1.39305 20.00000 1.78461 22.00000 2.24313 24.00000 2.77508 26.00000 3.38734 28.00000 4.08744 30.00000 4.88381 32.00000 5.78628 34.00000 6.80659 36.00000 7.95916 38.00000 9.26191 40.00000 10.73736 42.00000 12.41376 44.00000 14.32645 ______________________________________

Claim 8

ω = 114. 20° ______________________________________ No. R D Nd νd ______________________________________ 1 141.395* 5.000 1.60311 60.7 2 31.477 22.770 3 61.359 6.000 1.72151 29.2 4 936.733 2.500 1.77250 49.6 5 27.667 8.466 6 80.973 5.000 1.80518 25.4 7 -88.739 5.958 1.64328 47.9 8 ∞ 1.500 9 ∞ 1.800 1.51633 64.1 T 10 ∞ 0.500 11 20.662 1.000 1.77250 49.6 12 9.627 3.000 13 16.950 13.432 1.48749 70.1 14 -14.296 3.000 15 -28.095 2.870 1.62041 60.3 16 21.179 2.500 1.72151 29.2 17 89.099 1.000 18 -36.119 1.000 1.84666 23.9 19 28.905 7.000 1.48749 70.1 20 -16.098 0.100 21 66.585 5.800 1.77250 49.6 22 -41.712 ______________________________________ +93 D = 100.196 b, f = 3.6500 wherein the symbols have the following meaning: R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y X ______________________________________ 0. 0. 2.00000 0.01419 4.00000 0.5723 6.00000 0.13060 8.00000 0.23665 10.00000 0.37861 12.00000 0.56040 14.00000 0.78661 16.00000 1.06233 18.00000 1.39305 20.00000 1.78461 22.00000 2.24313 24.00000 2.77508 26.00000 3.38734 28.00000 4.08744 30.00000 4.88381 32.00000 5.78628 34.00000 6.80659 36.00000 7.95916 38.00000 9.26191 40.00000 10.73736 42.00000 12.41376 44.00000 14.32645 ______________________________________

Claim 9

A wide angle objective optical system comprising a lens system wherein the first surface of the system is configured in a non-spherical form and is represented by the formula ##EQU5## wherein X : the abscissa taken along the optical axis in the direction of incoming light, Y : the ordinate perpendicular to the abscissa, R 1 : the radius of curvature of the non-spherical surface at the vertex of the optical axis and wherein the optical elements have the following data: f = 13.0 Fno = 4.0 ω = ______________________________________ No. R D Nd νd ______________________________________ 1 147.341* 4.000 1.64000 60.2 2 32.584 13.145 3 41.808 3.000 1.64000 60.2 4 31.301 10.825 5 76.838 5.000 1.80518 25.4 6 154.018 0.200 7 101.770 2.500 1.77250 49.6 8 20.599 5.525 9 25.164 9.624 1.75520 27.5 10 152.475 1.500 11 ∞ 1.800 1.51633 64.1 T 12 ∞ 0.500 13 14.142 1.000 1.88300 41.0 14 7.486 3.000 15 26.776 5.891 1.75520 27.5 16 43.727 7.000 1.51633 64.1 17 -10.620 2.500 18 -25.398 4.788 1.75520 27.5 19 -915.785 1.000 20 -24.503 1.000 1.88300 41.0 21 36.421 5.000 1.48749 70.1 22 -13.504 0.100 23 62.000 4.500 1.77250 49.6 24 -37.307 ______________________________________ +93 D = 93.398 b, f = 36.500 wherein the symbols have the following meaning: R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y X ______________________________________ 0. 0. 2.00000 0.01361 4.00000 0.05490 6.00000 0.12523 8.00000 0.22689 10.00000 0.36309 12.00000 0.53800 14.00000 0.75669 16.00000 1.02513 18.00000 1.35012 20.00000 1.73919 22.00000 2.20046 24.00000 2.74257 26.00000 3.37461 28.00000 4.10610 30.00000 4.94735 32.00000 5.90993 34.00000 7.00783 36.00000 8.25921 38.00000 9.68926 40.00000 11.33427 42.00000 13.24758 44.00000 15.50770 ______________________________________

Claim 10

A wide angle objective optical system comprising a lens system wherein the first surface of the system is configured in a non-spherical form and is represented by the formula ##EQU5## wherein X : the abscissa taken along the optical axis in the direction of incoming light, Y : the ordinate perpendicular to the abscissa, R 1 : the radius of curvature of the non-spherical surface at the vertex of the optical axis and wherein the optical elements have the following data: f = 13.0 Fno = 4.0 ω = ______________________________________ No. R D Nd νd ______________________________________ 1 147.341* 4.000 1.64000 60.2 2 32.584 13.145 3 41.808 3.000 1.64000 60.2 4 31.301 10.825 5 76.838 5.000 1.80518 25.4 6 154.018 0.200 7 101.770 2.500 1.77250 49.6 8 20.599 5.525 9 25.164 9.624 1.75520 27.5 10 152.475 1.500 11 ∞ 1.800 1.51633 64.1 T 12 ∞ 0.500 13 14.142 1.000 1.88300 41.0 14 7.486 3.000 15 26.776 5.891 1.75520 27.5 16 43.727 7.000 1.51633 64.1 17 -10.620 2.500 18 -25.398 4.788 1.75520 27.5 19 -915.785 1.000 20 -24.503 1.000 1.88300 41.0 21 36.421 5.000 1.48749 70.1 22 -13.504 0.100 23 62.000 4.500 1.77250 49.6 24 -37.307 ______________________________________ +93 D = 93.398 b, f = 36.500 wherein the symbols have the following meaning: R : the radii of curvature of the respective lens elements; D : the axial thicknesses of the respective lens elements and axial air spaces between the successive lens elements; Nd : the refractive indices for the d line of the sodium spectrum of the respective material glasses; T : an interchangeable filter; S : a diaphragm; * the radius of curvature of the non-spherical surface at the vertex on the optical axis; and wherein the non-spherical surface has a configuration as indicated by the following relationship between X and Y: ______________________________________ Y X ______________________________________ 0. 0. 2.00000 0.01361 4.00000 0.05490 6.00000 0.12523 8.00000 0.22689 10.00000 0.36309 12.00000 0.53800 14.00000 0.75669 16.00000 1.02513 18.00000 1.35012 20.00000 1.73919 22.00000 2.20046 24.00000 2.74257 26.00000 3.37461 28.00000 4.10610 30.00000 4.94735 32.00000 5.90993 34.00000 7.00783 36.00000 8.25921 38.00000 9.68926 40.00000 11.33427 42.00000 13.24758 44.00000 15.50770 ______________________________________