Apochromatic relay lens systems suitable for use in a high definition telecine apparatus

Claim 2

A lens system comprising two groups of lens components and an aperture stop located between said two groups of lens components, said two groups of lens components arranged in he basic double gauss configuration; and an additional component located on the outside of said two groups of lens components, said additional component comprising a positive lens element and a negative lens element, said positive element and said negative element forming an interface, said interface being of negative optical power, wherein the index of refraction of said negative lens element is greater than that for said positive lens element, with the difference of refractive index ΔN being 0.14<ΔN<0.31.

Claim 3

The lens system according to claim 1 and wherein said negative lens element is located towards the exterior of the lens system.

Claim 4

The lens system according to claim 2 and wherein said additional component is located on the short conjugate side of the lens system.

Claim 5

The lens system according to claim 2 and wherein said additional component is a doublet component.

Claim 6

The lens system according to claim 3 and wherein said additional component is a doublet component.

Claim 7

The lens system according to claim 2 and wherein said positive element is cemented to said negative lens element forming a cemented interface, said cemented interface being negative in optical power.

Claim 8

The lens system according to claim 3 and wherein said positive lens element is cemented to said negative lens element forming a cemented interface, said cemented interface being negative in optical power.

Claim 9

The lens system according to claims 1, 5, or 7 and wherein said additional component is located on the short conjugate side of the lens system.

Claim 10

The lens system according to claim 5 and wherein said positive lens element has a convex rear surface and said negative lens element has a concave front surface.

Claim 11

A lens system according to claim 2, 3, or 4 wherein said lens system has several lens elements made of optical materials having abnormal relative partial dispersions so as to obtain superior color correction.

Claim 12

A lens system according to claim 8, and wherein said lens system has several lens elements made of optical materials having abnormal relative partial dispersions so as to obtain superior color correction.

Claim 13

A lens system according to claim 2, 3, or 4 wherein said lens system has more than half of the lens elements made of optical materials which have abnormal relative partial dispersions in order to produce an apochromatic color correction.

Claim 14

A lens system according to claim 1 and wherein the radii of the surfaces, the thicknesses of the elements and the optical materials are being as follows: ______________________________________ GLASS THICK- TYPE RADIUS NESS (BLANK = CAT- (mm) (mm) AIR) ALOG NAME ______________________________________ INFINITY 30.00 INFINITY 34.00 517642 BK7 (SCHOTT) INFINITY 49.56 INFINITY 6.00 517642 BK7 (SCHOTT) INFINITY 1.00 65.1231 9.11 586610 LGSK2 (SCHOTT) -153.0320 0.90 51.9944 10.43 586610 LGSK2 (SCHOTT) -67.5236 4.05 613443 KZFSN4 (SCHOTT) 126.8860 0.90 29.9767 8.47 487845 FK51 (SCHOTT) -161.9230 6.71 682482 LAF20 (SCHOTT) 17.0410 5.91 APERTURE 5.91 STOP -18.9197 3.00 613443 KZFSN4 (SCHOTT) 45.7245 9.07 586610 LGSK2 (SCHOTT) -28.3964 0.94 -78.6332 4.00 613443 KZFSN4 (SCHOTT) 30.3167 14.88 586610 LGSK2 (SCHOTT) -62.5651 0.98 71.9300 11.72 586610 LGSK2 (SCHOTT) -56.7590 19.04 77.1517 18.55 547536 BALF5 (SCHOTT) -26.8715 16.87 720504 LAK10 (SCHOTT) 82.2018 5.00 INFINITY 8.00 517642 BK7 (SCHOTT) INFINITY 15.00 INFINITY 0.00 ______________________________________ *Glasses with abnormal relative partial dispersions

Claim 15

A lens system according to claim 1 and wherein the radii of the surfaces, the thicknesses of the elements and the optical materials are as follows: ______________________________________ GLASS THICK- TYPE RADIUS NESS (BLANK = CAT- (mm) (mm) AIR) ALOG NAME ______________________________________ INFINITY 30.00 INFINITY 29.05 517642 BK7 (SCHOTT) INFINITY 48.58 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 6.00 -37.5865 5.00 654396 KZFSN5 (SCHOTT) 80.1994 9.88 501564 K10 (SCHOTT) -51.1244 1.00 103.021 8.70 586610 LGSK2 (SCHOTT) -76.5635 1.33 56.9611 10.05 586610 LGSK2 (SCHOTT) 117.738 1.00 47.9976 7.83 487845 FK51 (SCHOTT) -77.4080 1.43 -72.1304 9.87 558542 KZFSN1 (SCHOTT) 28.3067 2.86 APERTURE STOP 2.86 -28.3067 9.87 558542 KZFSN2 (SCHOTT) 72.1304 1.43 77.4080 7.83 487845 FK51 (SCHOTT) -47.9976 1.00 -148.567 5.56 586610 LGSK2 (SCHOTT) -59.4914 1.11 71.0150 12.71 586610 LGSK2 (SCHOTT) -111.360 7.50 43.2192 10.00 501564 K10 (SCHOTT) -66.2266 9.16 654396 KZFSN5 (SCHOTT) 31.7598 6.00 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 44.40 INFINITY 0.00 ______________________________________

Claim 16

A lens system according to claim 1 and wherein the radii of the surfaces, the thicknesses of the elements and the optical materials are as follows: ______________________________________ GLASS THICK- TYPE RADIUS NESS (BLANK = CAT- (mm) (mm) AIR) ALOG NAME ______________________________________ INFINITY 30.00 INFINITY 29.05 517642 BK7 (SCHOTT) INFINITY 45.92 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 6.00 -42.2210 9.93 788474 LASF014 (OHARA) 59.9993 11.11 586610 LGSK2 (SCHOTT) -58.3798 0.50 62.1033 10.20 586610 LGSK2 (SCHOTT) -79.8413 0.53 73.2211 5.40 586610 LGSK2 (SCHOTT) 141.494 0.50 31.2365 9.98 487845 FK51 (SCHOTT) -137.290 6.33 734515 LAK09 (OHARA) 25.2015 5.16 (APERTURE STOP) 5.16 -25.2015 6.33 734515 LAK09 (OHARA) 137.290 9.98 487845 FK51 (SCHOTT) -31.2365 0.50 -1117.00 5.73 586610 LGSK2 (SCHOTT) -92.1109 0.50 58.8936 9.64 586610 LGSK2 (SCHOTT) -79.8413 4.85 50.6343 10.71 586610 LGSK2 (SCHOTT) -48.0574 15.00 788474 LASFO14 (OHARA) 32.2625 6.00 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 46.98 INFINITY 0.00 ______________________________________ *Glasses with abnormal relative partial dispersion

Claim 17

A lens system according to claim 1 and wherein the radii of surfaces, the thickness of the elements and the optical materials are as follows: ______________________________________ GLASS THICK- TYPE RADIUS NESS (BLANK = CAT- (mm) (mm) AIR) ALOG NAME ______________________________________ INFINITY 30.00 INFINITY 29.05 517642 BK7 (SCHOTT) INFINITY 32.83 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 6.00 -60.56270 15.00 881410 LASFN31 (SCHOTT) 115.88460 1.00 107.93970 10.96 586610 LGSK2 (SCHOTT) -65.77260 1.00 138.93100 12.32 586610 LGSK2 (SCHOTT) -138.93100 1.00 73.23340 6.92 586610 LGSK2 (SCHOTT) 311.93580 5.55 35.45850 10.09 487845 FK51 (SCHOTT) -94.92920 1.01 -90.98260 5.62 558542 KZFSN2 (SCHOTT) 26.54090 4.61 (APER- 4.40 TURE STOP) -28.51400 7.96 558542 KZFSN2 (SCHOTT) 82.35970 1.50 90.75350 10.05 487845 FK51 (SCHOTT) -38.22780 5.06 875.95620 7.18 586610 LGSK2 (SCHOTT) -87.34010 1.00 74.72870 8.07 586610 LGSK2 (SCHOTT) -268.60470 1.00 41.07060 9.59 586610 LGSK2 (SCHOTT) -203.60640 1.00 -256.90180 11.36 LASFN31 (SCHOTT) 29.09140 6.00 INFINITY 4.00 517642 BK7 (SCHOTT) INFINITY 44.884 INFINITY 0.00 ______________________________________ *Glasses with abnormal relative partial dispersion

Claim 18

A lens system comprising two groups of lens components and an aperture stop located between said two groups of lens components, said two groups of lens components arranged in the basic double gauss configuration; and an additional cemented component located on the outside of said two groups of lens components, said additional component comprising a positive lens element cemented to a negative lens element forming a cemented interface, said cemented interface being negative in optical power, wherein the refractive index difference between the two optical materials is at least 0.14.

Claim 19

A lens system comprising two groups of lens components and an aperture stop located between said two groups of lens components, said two groups of lens components arranged in the basic double gauss configuration; and an additional cemented component located on the outside of said two groups of lens components, said additional component comprising a positive lens element cemented to a negative lens element forming a cemented interface, said cemented interface being negative in optical power, wherein the refractive index difference between the two optical materials is at least 0.14.

Claim 20

The lens system according to claim 17, wherein said difference in refractive index (ΔN) is 0.14<ΔN<0.31.

Claim 21

The lens system according to claim 17, wherein said cemented component is located on he short conjugate side of the lens system.

Claim 22

A lens system according to claim 17 and wherein said lens system has several lens elements made of optical materials which have abnormal relative partial dispersions to produce an apochromatic color correction.

Claim 23

A lens system according to claim 17 wherein said additional cemented component is a cemented doublet component.

Claim 24

An apochromatic lens system comprising two groups of lens components and an aperture stop located between said two groups of lens components, said two groups of lens components arranged in the basic double gauss configuration; a first doublet component located in front of said two groups of lens components; and a second doublet component located at the rear of said two groups of lens components, wherein said first and said second doublet components each is comprised of a positive lens element located towards the interior of the lens system and a negative lens element located towards the exterior of the lens system, and wherein the interface between the two lens elements of each doublet component is negative in optical power.

Claim 25

An apochromatic lens system comprising two groups of lens components and an aperture stop located between said two groups of lens components, said two groups of lens components arranged in the basic double gauss configuration; a first doublet component located in front of said two groups of lens components; and a second doublet component located at the rear of said two groups of lens components, wherein said first and said second doublet components each is comprised of a positive lens element located towards the interior of the lens system and a negative lens element located towards the exterior of the lens system, and wherein the interface between the two lens elements of each doublet component is negative in optical power.

Claim 26

A lens system comprising from front to back a first external doublet component, including a negative lens element and a positive lens element; a biconvex lens component; a meniscus lens component; an internal doublet having a lens element with a concave surface oriented towards an aperture stop; an aperture stop; an internal doublet lens having a lens element with a concave surface oriented towards the aperture stop; a meniscus lens component; a biconvex lens component; and a doublet including a positive lens element and a negative lens element.

Claim 27

A lens system comprising from front to back a first external doublet component, including a negative lens element and a positive lens element; a biconvex lens component; a meniscus lens component; an internal doublet having a lens element with a concave surface oriented towards an aperture stop; an aperture stop; an internal doublet lens having a lens element with a concave surface oriented towards the aperture stop; a meniscus lens component; a biconvex lens component; and a doublet including a positive lens element and a negative lens element.

Claim 28

A lens system according to claim 23, and wherein both of said internal doublets are uncemented and they are comprised of positive and negative lens elements.

Claim 29

A lens system according to claim 24, and wherein both of said internal doublets are cemented doublets and they are comprised of positive and negative lens elements cemented together.

Claim 30

A lens system comprising from front to back a first external cemented doublet lens component, including a negative biconcave lens element and a positive biconvex lens element; a single biconvex lens element; a single meniscus lens element; a first internal cemented doublet lens component having a concave surface oriented towards an aperture stop; an aperture stop; a second internal cemented doublet lens component having a concave surface oriented towards the aperture stop; a single meniscus lens element; a biconvex lens element; and a second external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 31

A lens system comprising from front to back a first external cemented doublet lens component, including a negative biconcave lens element and a positive biconvex lens element; a single biconvex lens element; a single meniscus lens element; a first internal cemented doublet lens component having a concave surface oriented towards an aperture stop; an aperture stop; a second internal cemented doublet lens component having a concave surface oriented towards the aperture stop; a single meniscus lens element; a biconvex lens element; and a second external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 32

A lens system comprising from front to back a first external cemented doublet lens component, including a negative biconcave lens element and a positive biconvex lens element; a single biconvex lens element; a single meniscus lens element; a single biconvex positive lens element; a single negative lens element having a concave surface oriented towards an aperture stop; an aperture stop; a single negative lens element having a concave surface oriented towards an aperture stop; a single biconvex lens element, a single meniscus lens element; a biconvex lens element; and a second external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 33

A lens system comprising from front to back a first external cemented doublet lens component, including a negative biconcave lens element and a positive biconvex lens element; a single biconvex lens element; a single meniscus lens element; a single biconvex positive lens element; a single negative lens element having a concave surface oriented towards an aperture stop; an aperture stop; a single negative lens element having a concave surface oriented towards an aperture stop; a single biconvex lens element, a single meniscus lens element; a biconvex lens element; and a second external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 34

A lens system comprising from front to back: a biconvex lens component; a meniscus lens component; an internal cemented doublet lens component having a concave surface oriented towards the aperture stop, an aperture stop, another internal cemented doublet lens component having a concave surface oriented towards the aperture stop; a meniscus lens component; a biconvex-lens element; and an external cemented doublet lens component.

Claim 35

A lens system comprising from front to back: a biconvex lens component; a meniscus lens component; an internal cemented doublet lens component having a concave surface oriented towards the aperture stop, an aperture stop, another internal cemented doublet lens component having a concave surface oriented towards the aperture stop; a meniscus lens component; a biconvex-lens element; and an external cemented doublet lens component.

Claim 36

A lens system comprising from front to back a single biconvex lens element; a first internal doublet comprised of a positive lens element and a negative lens element; a second internal doublet comprised of a positive lens element followed by a negative lens element having a concave surface oriented towards an aperture stop; an aperture stop; a third internal doublet lens component including a negative lens element having a concave surface oriented towards the aperture stop, a fourth internal doublet lens element; a biconvex lens element; and an external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 37

A lens system comprising from front to back a single biconvex lens element; a first internal doublet comprised of a positive lens element and a negative lens element; a second internal doublet comprised of a positive lens element followed by a negative lens element having a concave surface oriented towards an aperture stop; an aperture stop; a third internal doublet lens component including a negative lens element having a concave surface oriented towards the aperture stop, a fourth internal doublet lens element; a biconvex lens element; and an external cemented doublet lens component including a positive biconvex lens element and a negative biconcave lens element.

Claim 38

A lens system comprising from front to back: a single biconvex lens element, a first cemented doublet including a biconvex lens element cemented to a biconcave lens element; a second internal cemented doublet lens component having a concave surface oriented towards an aperture stop; an aperture stop; a third internal cemented doublet lens component having a concave surface oriented towards an aperture stop; a fourth cemented doublet including a negative lens element cemented to a positive biconvex lens element; a biconvex lens element; and an external cemented doublet lens component including a positive convex lens element and a negative biconcave lens element.

Claim 39

A lens system comprising from front to back: a single biconvex lens element, a first cemented doublet including a biconvex lens element cemented to a biconcave lens element; a second internal cemented doublet lens component having a concave surface oriented towards an aperture stop; an aperture stop; a third internal cemented doublet lens component having a concave surface oriented towards an aperture stop; a fourth cemented doublet including a negative lens element cemented to a positive biconvex lens element; a biconvex lens element; and an external cemented doublet lens component including a positive convex lens element and a negative biconcave lens element.

Claim 40

A lens system according to claims 23, 26, 27, 28, 29, or 30, and wherein said lens system having a plurality of lens elements made from glasses having abnormal relative partial dispersion so as to obtain apochromatic color correction.