Achromatic Doublet Design

50-mm f/5 achromatic doublet with 2° half-field of view.

This is a Fraunhoffer design.

General Lens Data

Surfaces                :                5
Stop                    :                1
System Aperture         : Entrance Pupil Diameter = 10
Glass Catalogs          : SCHOTT
Ray Aiming              : Off
Apodization             : Uniform, factor =   0.00000E+000
Temperature (C)         :    2.00000E+001
Pressure (ATM)          :    1.00000E+000
 Adjust Index Data To Environment  : Off
Effective Focal Length  :              50 (in air at system temperature and pressure)
Effective Focal Length  :              50 (in image space)
Back Focal Length       :        48.46352
Total Track             :        51.52207
Image Space F/#         :               5
Paraxial Working F/#    :               5
Working F/#             :        4.999175
Image Space NA          :      0.09950372
Object Space NA         :          5e-010
Stop Radius             :               5
Paraxial Image Height   :        1.746038
Paraxial Magnification  :               0
Entrance Pupil Diameter :              10
Entrance Pupil Position :               0
Exit Pupil Diameter     :        10.09718
Exit Pupil Position     :       -50.44447
Field Type              : Angle in degrees
Maximum Radial Field    :               2
Primary Wavelength      :       0.5875618 µm
Lens Units              :   Millimeters
Angular Magnification   :       0.9903752

Fields          : 3
Field Type: Angle in degrees
#        X-Value        Y-Value         Weight
 1       0.000000       0.000000       1.000000
 2       0.000000       1.400000       1.000000
 3       0.000000       2.000000       1.000000

Vignetting Factors
#       VDX       VDY       VCX       VCY       VAN
1  0.000000  0.000000  0.000000  0.000000  0.000000
2  0.000000  0.000000  0.000000  0.000000  0.000000
3  0.000000  0.000000  0.000000  0.000000  0.000000

Wavelengths     : 3
Units: µm
#          Value         Weight
 1       0.486133       1.000000
 2       0.587562       1.000000
 3       0.656273       1.000000

Surface Data

Surf     Type         Radius      Thickness                Glass      Diameter          Conic   Comment
 OBJ STANDARD       Infinity       Infinity                                  0              0   
 STO STANDARD         30.552              2                N-BK7          10.2              0   
   2 STANDARD      -27.35258            0.1                               10.2              0   
   3 STANDARD      -26.33233              1               N-SF10          10.2              0   
   4 STANDARD      -61.09347       48.42207                               10.2              0   
 IMA STANDARD       Infinity                                          3.506425              0   

Seidel Aberration Coefficients in Waves

Surf       W040        W131        W222       W220P        W311        W020        W111
STO    1.047329    0.893916    0.190744    0.144660    0.102436   -3.697404   -1.577904
  2   18.440978   -6.712979    0.610923    0.161581   -0.085008   -7.856096    1.429908
  3  -22.096667    7.857263   -0.698483   -0.207581    0.098999   22.154487   -3.938912
  4    2.846854   -2.123457    0.395970    0.089471   -0.107206  -10.922395    4.073486
IMA    0.000000    0.000000    0.000000    0.000000    0.000000    0.000000    0.000000

TOT    0.238495   -0.085257    0.499154    0.188131    0.009221   -0.321409   -0.013421

Ray Fans

RMS Spot Radius vs. Field

Maintained by John Loomis, last updated 1 June 2009