Lens system having at least one thin, highly deformed plate with aspherical surfaces

Claim 2

In a refractive lens system having an optical axis and also having aberrations, the improvement comprising a means for correcting the aberrations and including at least one thin, highly deformed plate in the lens system for the correction of aberrations, said thin, highly deformed plate having two aspheric surfaces wherein each ashperic surface is described by the following equation: X A1y2 + A2y4 + A3y6 + A4y8 + A5y10 + A6y12 + A7y14 + A8y16 wherein An are polyinominal coefficients, X is the distance along the optical axis of the lens system, y is the distance from the optical axis of the lens system, and the lens system is symmetrical about its optical axis and in which the departure of the two aspheric surfaces from spherical shapes is at least the same order of magnitude as the change in thickness between the largest thickness and the smallest thickness of said thin, highly deformed plate.

Claim 3

A lens system as set forth in claim 1 and specifically designed for the infrared portion of the spectrum, having a speed of F/2 or faster, having a field of view of greater than 30*, and comprising: a plurality of thin, highly deformed plates, each said plate having an index of refraction of two or greater and each said plate having two aspheric surfaces in which the departure of the two aspheric surfaces from spherical shapes is at least the same order of magnitude as the change in thickness between the largest thickness and the smallest thickness of the plate.

Claim 4

A lens system as set forth in claim 2 wherein each of said thin, highly deformed plates is formed of germanium.

Claim 5

A lens system as set forth in claim 2 and having substantially the characteristics set forth below: THREE ELEMENT F/2 FOCAL LENGTH - 29.96 Separation of Surfaces 1 - 2 0.7500 2 -3 5.4854 3 - 5 3.9398 5 - 6 0.7500 6 - 7 4.2987 7 - 8 1.0110 8 -9 26.9731 SURFACE 1 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.284656E-01 A2 -0.106594E-04 A3 -0.383960E-06 A4 0.596083E-10 A5 0.149096E-11 A6 0.387147E-13 A7 0.331571E-15 A8 -0.475274E-17 SURFACE 2 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.283207E-01 A2 -0.144112E-04 A3 -0.458670E-06 A4 0.3495553E-09 A5 0.4065775E-11 A6 0.710067E-13 A7 -0.279664E-15 A8 -0.316657E-17 SURFACE 5 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.680585E-02 A2 -0.240318E-03 A3 -0.0106899E-05 A4 -0.278617E-08 A5 -0.277143E-10 A6 -0.254051E-12 A7 -0.587506E-14 A8 -0.150428E-16 SURFACE 6 POLYNOMIAL COEFFICIENTS COEFFICIENTVALUEA1 -0.714460E-02 A2 -0.224138E-03 A3 -0.838780E-06 A4 0.244971E-08A5 -0.692714E-10 A6 0.302935E-12 A7 -0.392617E-14 A8 -0.100810E-16 SURFACE 7 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.183219E-01 A2 0.435280E-05 A3 0.239812E-06 A4 0.276059E-09 A5 -0.501623E-11 A6 0.334377E-13 A7 -0.491751E-16 A8 -0.580397E-18 SURFACE 8 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.224846E-01 A2 -0.135062E-05 A3 0.196675E-06 A4 0.805437E-09 A5 -0.697555E-11 A6 0.393201E-13 A7 -0.326549E-16 A8 -0.719943E-18 SURFACE 9 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.392109E-02 A2 0.769801E-05 A3 -0.611495E-08 A4 0.533514E-11 A5 -0.208303E-13 A6 -0.180053E-24 A7 -0.103548E-28 A8 -0.662825E-33

Claim 6

A lens system as set forth in claim 4 wherein each of said thin, highly deformed plates is formed of germanium.

Claim 7

A lens system as set forth in claim 2 and having the characteristics set forth below: THREE ELEMENT F/1.4 FOCAL LENGTH - 21 Separation of Surfaces 1 - 2 0.7000 2 - 3 5.1321 3 - 5 3.5488 5 - 6 0.7000 6 - 7 6.7095 7 - 8 0.7000 8 - 9 12.7939 SURFACE 1 POLYNOMIAL COEFFICIENTS COEFFICIENT VLAUE A1 0.411090E-01 A2 0.884367E-04 A3 0.155710E-05 A4 -0.155574E-07 A5 0.200970E-09 A6 -0.165759E-12 A7 0.396938E-15 A8 0.228560E-16 SURFACE 2 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.399009E-01 A2 0.929605E-04 A3 0.164568E-05 A4 -0.125073E-07 A5 0.595141E-10 A6 0.204541E-11 A7 -0.200361E-14 A8 -0.837223E-16 SURFACE 5 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.356314E-02 A2 -0.199684E-03 A3 -0.232003E-05 A4 -0.132235E-07 A5 0.121303E-09 A6 -0.211221E-11 A7 0.113899E-13 A8 0.267223E-15 SURFACE 6 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.143848E-02 A2 -0.195107E-03 A3 -0.200231E-05 A4 -0.147829E-07 A5 0.343119E-09 A6 -0.296525E-11 A7 -0.334305E-14 A8 0.276317E-15 SURFACE 7 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.569086E-02 A2 -0.195660E-05 A3 -0.213327E-06 A4 -0.679279E-08 A5 0.487378E-10 A6 -0.834506E-13 A7 0.303122E-16 A8 0.362109E-18 SURFACE 8 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.110872E-01 A2 -0.187462E-05 A3 -0.785190E-07 A4 -0.977145E-08 A5 0.899649E-10 A6 -0.420130E-12 A7 0.972552E-15 A8 0.554971E-18 SURFACE 9 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.702481E-02 A 2 0.232735E-04 A3 0.114231E-06 A4 -0.116914E-08A50.243000E-11 A6 -0.119558E-21 A7 -0.224327E-25 A8 -0.461293E-29

Claim 8

A lens system as set forth in claim 6 wherein each of said thin, highly performed plates is formed of germanium.

Claim 9

A lens system as set forth in claim 2 and having substantially the characteristics set forth below: FOUR ELEMENT F/2 FOCAL LENGTH - 29.96 Specification of Surfaces 1 - 2 1.4988 2 - 3 4.1988 3 - 4 .75500 4 - 5 1.4082 5 - 7 4.3556 7 - 8 .7500 8 -9 3.6340 9 - 10 .9284 10 - 11 20.2337 SURFACE 1 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.355365E-01 A2 0.420445E-04 A3 0.168923E-06 A4 -0.286201E-09 A5 0.645338E-12 A6 0.378137E-13 A7 -0.119481E-15 A8 0.780458E-19 SURFACE 2 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.341975E-01 A2 0.257645E-04 A3 0.930704E-07 A4 -0.139757E-08 A5 -0.117934E-11 A6 0.581170E-13A7-0.163186E-15 A8 0.234293E-19 SURFACE 3 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.255292E-01 A2 -0.171074E-03 A3 0.569595E-06 A4 0.255640E-08 A5 0.355440E-09 A6 -0.283933E-11 A7 -0.262940E-14 A8 -0.621752E-25 SURFACE 4 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.287570E-01 A2 -0.157728E-03 A3 0.125510E-05 A4 -0.375666E-08 A5 0.576370E-09 A6 -0.429021E-11 A7 0.106100E-13 A8 0.208415E-21 SURFACE 7 POLYNOMIAL COEFFICIENTS COEFFICIENTVALUE A1-0.252638E-01A20.162717E-04A30.163854E-05 A40.247747E-08A5-0.159428E-09A6-0.582616E-12A70.673413E-14A8-0.174029E-21 SURFACE 8 POLYNOMIAL COEFFICIENTS COEFFICIENTVALUE A1-0.263793E-01A20.276853E-04A30.135613E-05A40.401450E-08A5-0.130612E-09 A6-0.100572E-11 A70.818610E-14A8-0.305970E-22 SURFACE9POLYNOMIAL COEFFICIENTSCOEFFICIENTVALUEA1-0.299933E-01A20.671354E-04A30.337496E -06A40.197999E-09 A5 -0.657601E-11 A6 0.880695E-13 A7 -0.698222E-16 A8 -0.487924E-21 SURFACE 10 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.320354E-01 A2 0.377797E-04 A3 0.253731E-06 A4 0.112947E-08 A5 -0.678897E-11 A6 0.111059E-12 A7 -0.952922E-16 A8 -0.243308E-19

Claim 10

A lens system as set forth in claim 8 wherein each of said thin, highly deformed plates is formed of germanium.

Claim 11

A lens system as set forth in claim 2 and having substantially the characteristics set forth below: FOUR ELEMENT F/1.4 FOCAL LENGTH - 21 Separation of Surfaces 1 - 2 0.7000 2 - 3 5.6652 3 - 4 0.7000 4 - 5 3.0212 5 - 7 5.4229 7 - 8 0.7000 8 - 9 3.6422 9 - 10 0.7000 10 - 11 10.1289 SURFACE 1 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.377556E-01 A2 0.711727E-04 A3 0.280455E-06 A4 0.149597E-08 A5 0.962967E-12 A6 0.521991E-16 A7 0.828657E-19 A8 0.136033E-21 SURFACE 2 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.374387E-01 A2 0.781662E-04 A3 0.349475E-06 A4 0.173574E-08 A5 0.159310E-11 A6 0.623530E-15 A7 0.162835E-17 A8 0.439743E-20 SURFACE 3 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.183013E-01 A2 0.307204E-04 A3 0.357654E-06 A4 0.896277E-09 A5 -0.642890E-11 A6 0.366249E-17 A7 0.395015E-20 A8 0.440564E-23 SURFACE 4 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 0.147581E-01 A2 0.255754E-04 A3 0.383079E-06 A4 0.303876E-09 A5 -0.784487E-11 A6 0.374745E-19 A7 0.168747E-22 A8 0.785769E-26 SURFACE 7 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.320269E-02 A2 -0.297869E-03 A3 -0.697876E-06 A4 -0.184290E-07 A5 0.439903E-11 A6 -0.541794E-20 A7 -0.221678E-23 A8 -0.937927E-27 SURFACE 8 POLYNOMIAL COEFFICIENTS COEFFICIENTVALUE A1 -0.405323E-02 A2 -0.282454E-03 A3 -0.528827E-06 A4 -0.970396E-08 A5 0.703710E-11 A6 0.163886E-19 A7 -0.801069E-23 A8 0.404909E-26 SURFACE 9 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.115893E-01 A2 -0.201608E-04 A3 0.386288E-06 A4 -0.400963E-09 A5 -0.193264E-11 A6 -0.734308E-18 A7 -0.629236E-21 A8 -0.557581E-24 SURFACE 10 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.160620E-01 A2 -0.144057E-04 A3 0.407039E-06 A4 -0.475656E-09A5-0.157049E-11A6 0.142395E-21 A7 -0.206846E-25 A8 -0.310714E-29 SURFACE 11 POLYNOMIAL COEFFICIENTS COEFFICIENT VALUE A1 -0.738193E-02 A2 0.369482E-04 A3 -0.124971E-06 A4 0.240754E-09 A5 -0.877590E-18 A6 -0.142271E-21 A7 -0.241626E-25 A8 -0.424356E-29

Claim 12

A lens system as set forth in claim 10 wherein each of said thin, highly deformed plates is formed of germanium.