Aperture Width (X) vs Module Depth (Z)

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Module Depth (Z) mm

Xmin

Xmax

Aperture Height (Y) vs Module Depth (Z)

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Module Depth (Z) mm

Ymin

Ymax

Module Depth

(Z) mm

Aperture Width (X, mm)

Aperture height (Y, mm)

Min

Max

Min

Max

0

7.20+W1

9.16+W2

1.70+W1

3.66+W2

1

7.73+W1

10.32+W2

2.23+W1

4.82+W2

2

8.27+W1

11.47+W2

2.77+W1

5.97+W2

3

8.81+W1

12.62+W2

3.31+W1

7.12+W2

4

9.34+W1

13.78+W2

3.84+W1

8.28+W2

5

9.88+W1

14.93+W2

4.38+W1

9.43+W2

6

10.41+W1

16.09+W2

4.91+W1

10.59+W2

7

10.95+W1

17.24+W2

5.45+W1

11.74+W2

8

11.49+W1

18.40+W2

5.99+W1

12.90+W2

9

12.02+W1

19.55+W2

6.52+W1

14.05+W2

Itisrecommendedthatthetoleranceforassemblybeconsideredaswell.Therecommendedminimumwindowsize

whichwilltakeintoaccountoftheassemblytoleranceisdefinedas:

Xmin+assemblytolerance=Xmin+2*(assemblytolerance)(Dimensionsareinmm)

Ymin+assemblytolerance=Ymin+2*(assemblytolerance)(Dimensionsareinmm)

Inthefigureabove,Xisthewidthofthewindow,YistheheightofthewindowandZisthedistancefromtheASDL-

3023tothebackofthewindow.ThedistancefromthecenteroftheLEDlenstothecenterofthephotodiodelens,K,is

5.5mm.Theequationsforcomputingthewindowdimensionsareasfollows:

X=K+2*(Z+D)*tanA

Y=2*(Z+D)*tanA

Theaboveequationsassumethatthethicknessofthewindowisnegligiblecomparedtothedistanceofthemodule

fromthebackofthewindow(Z).Iftheyarecomparable,

W1=0.33*T,

W2=0.66*T,

whereTisthewindowthicknessandtherefractiveindexofthewindowmaterialis1.586.

ThedepthoftheLEDimageinsidetheASDL-3023,D,is3.17mm.‘A’istherequiredhalfangleforviewing.ForIrDA

compliance,theminimumis15°andthemaximumis30°.Theequationsresultinthefollowingtablesandgraphs.The

graphsareplottedassumingthatthethicknessofthewindowisnegligible.