en:lenscatalog:version061001:lensgeo.dat
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en:lenscatalog:version061001:lensgeo.dat [2013/06/03 15:13] – created sebastianraring | en:lenscatalog:version061001:lensgeo.dat [2019/06/14 13:16] (current) – sebastianraring | ||
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+ | ====== 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, | ||
+ | |7|Exact diameter in the horizontal semiaxis|26|4|9999|99, | ||
+ | |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: | ||
+ | |10|Max. horizontal distance to distance reference point \\ (Room reference point for office lenses)|36|5|+9999|+99.99mm: | ||
+ | |11|Vertical distance to dividing edge (Bifo / Trifo)|41|5|+9999|+99.99mm: | ||
+ | |12|Horizontal distance to dividing edge (Bifo / Trifo)|46|5|+9999|+99.99mm: | ||
+ | |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: | ||
+ | |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 " | ||