Catadioptric objective

Claim 2

A catadioptric objective lens system having a front end, a rear end, and a principal optical axis, comprising: a. a double convex lens element, having a centrally located opening, which is axially aligned with said principal optical axis of said system; b. a double concave lens element having a centrally located opening, with said double concave lens element disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to, said double convex lens element; c. a negative meniscus shaped lens element, concave and reflective to the front, having a centrally located opening, with said negative meniscus shaped lens element disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to, said double concave lens element; d. a plano-convex lens element, convex and reflective to the rear, with said plano-convex lens element disposed forward of, and in axial alignment with, and also in spaced-apart relationship to, said concave front negative meniscus shaped lens element; e. a first positive meniscus shaped lens element, convex to the front, disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to, said plano-convex lens element; f. a second positive meniscus shaped lens element, convex to the front, disposed rearward of, and in axial alignment with, and also in abutting relationship to, said first positive meniscus shaped lens element; g. a third positive meniscus shaped lens element, convex to the front, disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to, said second positive meniscus shaped element, with this said third positive meniscus shaped lens element also simultaneously disposed partly within said centrally located opening of the said concave front negative meniscus shaped lens element and partly forward of this same said lens element; h. a first parallel plate lens element disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to said third positive meniscus shaped lens element and to said concave front negative meniscus shaped lens element having a centrally located opening i. and, a second parallel plate lens element disposed rearward of, and in axial alignment with, and also in spaced-apart relationship to, said first parallel plate lens element.

Claim 3

A catadioptric objective lens system made according to the following specifications: __________________________________________________________________________ INDEX OF LENS RADIUS THICKNESS DIAMETER SPACING REFRA ABBE NO. (R) (t) (d) (S) (Nd) (v) __________________________________________________________________________ S.sub.1 = 2.231 A R.sub.1 = 32.7337 t.sub.1 = 1.713 d.sub.1 = 14.785 1.62041 60.33 R.sub.2 = 40.5756 d.sub.2 = 7.20 S.sub.2 = 2.280 B R.sub.3 = 35.8426 t.sub.2 = .924 d.sub.3 = 13.300 1.61310 44.34 R.sub.4 = 213.4303 d.sub.4 = 6.740 S.sub.3 = 7.524 C R.sub.5 = 21.5671 d.sub.5 = 11.250 1.53113 62.15 R.sub.6 = 36.6880 t.sub.3 = .813 d.sub.6 = 5.500 R.sub.7 = 21.5671 S.sub.4 = 7.888 D R.sub.8 = ∞ t.sub.4 = .500 d.sub.7 = 6.218 1.4866 61.10 R.sub.9 = 332.2537 S.sub.5 = 5.252 E R.sub.10 = 9.5268 t.sub.5 = .812 d.sub.8 = 4.650 1.62096 35.90 R.sub.11 = 5.8540 S.sub.6 = NONE F R.sub.12 = 5.8540 t.sub.6 = .773 d.sub.9 = 4.460 1.61484 51.16 R.sub.13 = 7.3515 S.sub.7 = .181 G R.sub.14 = 5.4252 t.sub.7 = 1.198 d.sub.10 = 4.400 1.62041 60.33 R.sub.15 = 66.8127 S.sub.8 = 1.079 H R.sub.16 = ∞ t.sub.8 = .125 d.sub.11 = 3.794 1.51680 64.17 R.sub.17 = ∞ S.sub.9 = .238 I R.sub.18 = ∞ t.sub.9 = .125 d.sub.12 = 3.794 1.51680 64.17 R.sub.19 = ∞ ALL DIMENSIONS ARE IN INCHES VIGNETTING FOR λ = .85μ __________________________________________________________________________ F/1.2835 Objective ANGLE % 460MM E.F.L., 10° 2.5°MM Format 27.976 S-20 Response and .85 Microns 4.5° 54.167 T/Number = 1.9792, Blocking = 32.8%, 5.0° 60.714 Distortion = 0.76% (Pincushion) __________________________________________________________________________

Claim 4

A catadioptric objective lens system made according to the following specifications: __________________________________________________________________________ INDEX OF LENS RADIUS THICKNESS DIAMETER SPACING REFRA ABBE NO. (R) (t) (d) (S) (Nd) (v) __________________________________________________________________________ S.sub.1 = 2.231 A R.sub.1 = 32.7337 t.sub.1 = 1.713 d.sub.1 = 14.785 1.62041 60.33 R.sub.2 = 40.5756 d.sub.2 = 7.20 S.sub.2 = 2.280 B R.sub.3 = 35.8426 t.sub.2 = .924 d.sub.3 = 13.300 1.61310 44.34 R.sub.4 = 213.4303 d.sub.4 = 6.740 S.sub.3 = 7.524 C R.sub.5 = 21.5671 d.sub.5 = 11.250 1.53113 62.15 R.sub.6 = 36.6880 t.sub.3 = .813 d.sub.6 = 5.500 R.sub.7 = 21.5671 S.sub.4 = 7.888 D R.sub.8 = ∞ t.sub.4 = .500 d.sub.7 = 6.218 1.4866 61.10 R.sub.9 = 332.2537 S.sub.5 = 5.252 E R.sub.10 = 9.5268 t.sub.5 = .812 d.sub.8 = 4.650 1.62096 35.90 R.sub.11 = 5.8540 S.sub.6 = NONE F R.sub.12 = 5.8540 t.sub.6 = .773 d.sub.9 = 4.460 1.61484 51.16 R.sub.13 = 7.3515 S.sub.7 = .181 G R.sub.14 = 5.4252 t.sub.7 = 1.198 d.sub.10 = 4.400 1.62041 60.33 R.sub.15 = 66.8127 S.sub.8 = 1.079 H R.sub.16 = ∞ t.sub.8 = .125 d.sub.11 = 3.794 1.51680 64.17 R.sub.17 = ∞ S.sub.9 = .238 I R.sub.18 = ∞ t.sub.9 = .125 d.sub.12 = 3.794 1.51680 64.17 R.sub.19 = ∞ ALL DIMENSIONS ARE IN INCHES VIGNETTING FOR λ = .85μ __________________________________________________________________________ F/1.2835 Objective ANGLE % 460MM E.F.L., 10° 2.5°MM Format 27.976 S-20 Response and .85 Microns 4.5° 54.167 T/Number = 1.9792, Blocking = 32.8%, 5.0° 60.714 Distortion = 0.76% (Pincushion) __________________________________________________________________________