[Raytrace] Stevich Paul in OSLO LT

[Henry Feinman]

Hello Ray Tracers,

I have been playing with OSLO LT for some time now, attempting to design 
a Stevick Paul that could be mounted alt-az.  This means shortening the 
ratio for secondary  primary FL from .41 to .33 or thereabouts so that 
the Primary and Tertiary are at approximately the same plane, and so 
attach the cells of both to the same simple box / framework.

I have come up with a design that appears quite good  - going by 
wavefront analysis, peak valley / RMS OPD, spot diagram, MTF, Strehl 
ratio, but there appears one major problem:  The distortion analysis 
shows a huge percentage compared to other  designs -350 Distortion % at 
about 2 mm distant from axis.

I don't quite understand the purpose or meaning of this, and I was 
wondering if, given the positive factors of the other measures, this was 
something to worry about.

BTW I must give Steve Fejes a big thanks for his OSLO tutorial - I would 
never have been able to grasp the technology without this work.

Regards, Henry Feinman

// OSLO 6.1 10181 16418 15137
LEN NEW "Stevick Paul 14 in f 8.54" 2973.6 6
EBR  174.0
ANG  0.5
DES  "Henry Fein"
UNI  1.0
SNO6 "geniierf_lt 0.05 25.0 1.00 -0.90 0.90 0.80 -0.80 0.80 0.70 1.0 1.0"
// SRF 0
AIR
TH   1.0e+20
AP  8.7268677908e+17
NXT  // SRF 1
RFL
RD   -5950.0
TH   -1933.75
AP CHK 175.0
CC   -1.0722978738888
DT   1
TLA  -3.95
BEN
ELMTTL "" "" "02 Mar 2003" 0
ELMMED 320.0 1.5 0.63 5 0 0 0 0 0 0
ELMSF1 1 0.5 1.5 0.63 5 1
ELMSF1 2 0.5 1.5 0.63 5 1
NXT  // SRF 2
RFL
RD   -2082.0
TH   2082.5
DT   1
TLA  7.6323625213874
BEN
ELMTTL "" "" "02 Mar 2003" 0
ELMMED 140.907 1.5 0.63 5 0 0 0 0 0 0
ELMSF1 1 0.5 1.5 0.63 5 1
ELMSF1 2 0.5 1.5 0.63 5 1
NXT  // SRF 3
RFL
RD   -2082.0
TH   -990.0
DT   1
TLA  3.7033733489214
BEN
NXT  // SRF 4
RFL
TH   30.0
AP CHK 0.0
DT   1
DCX  3.2
DCY  3.2
TLB  45.0
BEN
NXT  // SRF 5
AIR
AP CHK 0.0
NXT  // SRF 6
AIR
TH   20.4566882139282
AP CHK 0.0
DT   1
TLA  14.2069936520005
CBK  1
WV 0.58756 0.48613 0.65627
WW 3.0 2.0 1.0
END  6
DLNF 10
DLNR  0 5
DLNR  1 5
DLMN  1 -1.0
DLMX  1 1.0
DLNR  2 5
DLNR  3 5
DLFP  3 -0.1
DLMN  3 -1.0
DLMX  3 1.0
DLNR  4 5
DLFP  4 -0.7
DLMN  4 -1.0
DLMX  4 1.0
DLNR  5 5
DLXF  5 0.7
DLMN  5 -1.0
DLMX  5 1.0
DLNR  6 5
DLXF  6 1.0
DLMN  6 -1.0
DLMX  6 1.0
DLNR  7 5
DLXF  7 -0.7
DLMN  7 -1.0
DLMX  7 1.0
DLNR  8 5
DLXF  8 -0.1
DLMN  8 -1.0
DLMX  8 1.0
DLNR  9 5
DLFP  9 0.7
DLXF  9 0.7
DLMN  9 -1.0
DLMX  9 1.0
DLAS On
SDAD 32.0
SDSA On
OPDF 0.233517296312
OMNG 0.7
OPOC "geniiops"
VAR NEW
V 1 1 0 TH -2100.0 -1900.0 1.0 0.0001
V 2 2 0 TH 1900.0 2250.0 1.0 0.0001
END
OPE NEW
O 1 "OCM1" 0.0 "_Dy tol"
O 2 "OCM2" 0.0 "_2.1 Dy"
O 3 "OCM3" 0.0 "_2.8 Dy"
O 4 "OCM4" 0.0 "_3 Dy"
O 5 "OCM5" 0.0 "_4 Dy"
O 6 "OCM6" 0.0 "_up Dy/3"
O 7 "OCM7" 0.0 "_3.2 up Dy"
O 8 "OCM8" 0.0 "_Fnb tol"
O 9 "OCM9/OCM8" 1.0 "Fnb diff"
O 10 "OCM10/OCM4" 1.0 "Focus diff"
O 11 "OCM11/OCM1" 1.0 "Axial DY"
O 12 "OCM12/OCM6" 1.0 "Axial OPD"
O 13 "OCM13/OCM6" 1.0 "Axial DMD"
O 14 "OCM14" 0.0 "_0.7 Dstol"
O 15 "OCM15" 0.0 "_0.7 Dist"
O 16 "OCM15/OCM14" 1.0 "0.7 Dist"
O 17 "OCM17/OCM2" 1.0 "0.7 YFS"
O 18 "OCM18/OCM2" 1.0 "0.7 XFS"
O 19 "OCM19/OCM7" 1.0 "0.7 Coma"
O 20 "OCM20/OCM3" 1.0 "0.7 DY U"
O 21 "OCM21/OCM6" 1.0 "0.7 OPD U"
O 22 "OCM22/OCM6" 1.0 "0.7 DMD U"
O 23 "OCM23/OCM3" 1.0 "0.7 DY L"
O 24 "OCM24/OCM6" 1.0 "0.7 OPD L"
O 25 "OCM25/OCM6" 1.0 "0.7 DMD L"
O 26 "OCM26/OCM3" 1.0 "0.7 Sag DX"
O 27 "OCM27/OCM1" 1.0 "0.7 Sag DY"
O 28 "OCM28/OCM6" 1.0 ".7 Sag OPD"
O 29 "OCM29" 0.0 "_1.0 Dstol"
O 30 "OCM30" 0.0 "_1.0 Dist"
O 31 "OCM30/OCM29" 1.0 "1.0 Dist"
O 32 "OCM32/OCM4" 1.0 "1.0 YFS"
O 33 "OCM33/OCM1" 1.0 "1.0 XFS"
O 34 "OCM34/OCM7" 1.0 "1.0 Coma"
O 35 "OCM35/OCM5" 1.0 "1.0 DY U"
O 36 "OCM36/OCM6" 1.0 "1.0 OPD U"
O 37 "OCM37/OCM6" 1.0 "1.0 DMD U"
O 38 "OCM38/OCM5" 1.0 "1.0 DY L"
O 39 "OCM39/OCM6" 1.0 "1.0 OPD L"
O 40 "OCM40/OCM6" 1.0 "1.0 DMD L"
O 41 "OCM41/OCM5" 1.0 "1.0 Sag DX"
O 42 "OCM42/OCM1" 1.0 "1.0 Sag DY"
O 43 "OCM43/OCM6" 1.0 "1 Sag OPD"
O 44 "OCM44" 0.0 "_f1_fymax"
O 45 "OCM45" 0.0 "_f2_fymin"
O 46 "OCM46" 0.0 "_f2_fymax"
O 47 "OCM47" 0.0 "_f2_fx"
O 48 "OCM48" 0.0 "_f3_fymin"
O 49 "OCM49" 0.0 "_f3_fymax"
O 50 "OCM50" 0.0 "_f3_fx"
END