Differences

This shows you the differences between two versions of the page.

--- en:lenscatalog:version061001:lensgeo.dat [2014/03/04 12:13] – estermanns
+++ en:lenscatalog:version061001:lensgeo.dat [2019/06/14 13:16] (current) – sebastianraring
@@ Line 1: / Line 1: @@
+====== LensGeo.Dat ======
+===== Description =====
+The geometric base data, reference points, centration lines and near portions are defined in the LensGeo.Dat file.
+===== Table structure =====
+^No. ^Field name ^Pos ^Length ^Format ^Comments ^
+|1*|Man. code base lens|1|6|T6| |
+|2*|Diameter of base lens|7|4|9999|9999 or 99 with 2 blanks \\ \\ 00 with 2 blanks = geometry applies to all not separately listed centric diameters \\ \\ 0000 = geometry applies to all not separately listed non-centric diameters|
+|3*|Elliptic|11|1|T1| blank=round \\ “E”=elliptic|
+|4*|Strongest principal meridian from|12|5|+9999|+99.99 D \\ Empty = geometry applies to all delivery ranges not specified|
+|5*|Strongest principal meridian to|17|5|+9999|+99.99 D \\ Empty = geometry applies to all delivery ranges not specified|
+|6|Exact diameter in the vertical semiaxis|22|4|9999|99,99mm \\ Empty if value "0000" is indicated under Pos. 2, "Diameter of base lens".|
+|7|Exact diameter in the horizontal semiaxis|26|4|9999|99,99mm \\ Empty if value "0000" is indicated under Pos. 2, "Diameter of base lens".|
+|8|Near portion type|30|1|9|0=C \\ 1=S \\ 2=Panto \\ 3=round \\ 4=Executive |
+|9|Vertical distance to distance reference point \\ (Room reference point for office lenses) |31|5|+9999|+99.99mm: \\ vertical distance from the geometric center of the base lens to the distance reference point. \\ Superior positive|
+|10|Max. horizontal distance to distance reference point \\ (Room reference point for office lenses)|36|5|+9999|+99.99mm: \\ horizontal distance from the geometric center of the base lens to the distance reference point. \\ Nasal positive|
+|11|Vertical distance to dividing edge (Bifo / Trifo)|41|5|+9999|+99.99mm: \\ Vertical distance from the geometric center of the base lens to extreme point T of the near portion \\ Inferior positive.|
+|12|Horizontal distance to dividing edge (Bifo / Trifo)|46|5|+9999|+99.99mm: \\ Horizontal distance from the geometric center of the base lens to extreme point T of the near portion. \\ Nasal positive|
+|13|Vertical distance to the near portion center (Bifo / Trifo)|51|5|+9999|Vertical distance from the geometric center of the base lens to the center of the circle describing the lower radius of the near portion. \\ Inferior positiv.|
+|14|Lower radius of near portion|56|4|9999|99.99mm \\ for bifocals /trifocals|
+|15|Upper radius of near portion|60|4|9999|99.99mm \\ for bifocals /trifocals|
+|16|Width of near portion|64|4|9999|99.99mm \\ for bifocals /trifocals|
+|17|Height of near portion|68|4|9999|99.99mm \\ for bifocals /trifocals|
+|18|Height of intermediate portion|72|4|9999|99.99mm \\ for trifocals|
+|19|Max. vertical distance to distance centering cross (progressive lens)|76|4|9999|99.99mm \\ vertical distance from the geometric center of the base lens to the distance centering cross. \\ Superior positive.|
+|20|Centering to zero gaze direction or principal visual direction (progressive lens)|80|1|9|0=zero gaze direction \\ 1=principal visual direction|
+|21*|Maximum vertical distance to near reference point (progressive lens)|81|4|9999|99.99mm \\ vertical distance from the geometric center of the base lens to the near reference point. \\ Inferior positive|
+|22*|Minimum vertical distance to near reference point (progressive lens)|85|4|9999|99.99mm \\ minimum vertical distance from the geometric center of the base lens to the near reference point. \\ Inferior positive|
+|23*|Maximum horizontal distance to near reference point (progressive lens)|89|4|9999|99.99mm \\ maximum horizontal distance from the geometric center of the base lens to the near reference point. \\ Nasal positive|
+|24*|Minimum horizontal distance to near reference point (progressive lens)|93|4|9999|99.99mm \\ minimum horizontal distance from the geometric center of the base lens to the near reference point. \\ Nasal positive|
+|25|Variable decentration. \\  Smallest decentration|97|2|99|0= No variable decentration \\ Value= smallest optical diameter. \\ See LensRange.Dat file description|
+|26|Min. horizontal distance to distance reference point (Room reference point for office lenses)|99|5|+9999|+99.99mm: horizontal distance from the geometric center of the base lens to the distance reference point. Nasal positive (see also field 10)|
+|27|Min. vertical distance to distance centering cross (progressive)|104|4|9999|99.99mm vertical distance from the geometric center of the base lens to the distance centering cross. \\ Superior positive|
+===== Notes =====
+If the diameter (Field 2) is specified with "0000" or "00" and is therefore applicable to all diameters, the values for "Exact diameter" (Field 6/7) are not used or are also filled with "0000".