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## HSDL-3603 Datasheet(PDF) 21 Page - Agilent(Hewlett-Packard)

 Part # HSDL-3603 Description IrDA짰 Data Compliant 4 Mbit/s Infrared Transceiver Download 24 Pages Scroll/Zoom 100% Manufacturer HP [Agilent(Hewlett-Packard)] Direct Link http://www.home.agilent.com Logo

## HSDL-3603 Datasheet(HTML) 21 Page - Agilent(Hewlett-Packard)

 21 / 24 page21Appendix D: Window DesignOptical Port Dimensions for HSDL-3603:To ensure IrDA compliance,some constraints on the heightand width of the window exist.The minimum dimensions ensurethat the IrDA cone angles are metwithout vignetting. The maximumdimensions minimize the effectsof stray light. The minimum sizecorresponds to a cone angle of30° and the maximum size corre-sponds to a cone angle of 60º.In the figure below, X is the widthof the window, Y is the height ofthe window and Z is the distancefrom the HSDL-3603 to the backof the window. The distance fromthe center of the LED lens to thecenter of the photodiode lens, K,is 7.08 mm. The equations forcomputing the window dimen-sions are as follows:X = K + 2*(Z + D)*tanAY = 2*(Z + D)*tanAThe above equations assume thatthe thickness of the window isnegligible compared to the dis-tance of the module from the backof the window (Z). If they are com-parable, Z' replaces Z in the aboveequation. Z' is defined asZ' = Z + t/nwhere ‘t’ is the thickness of thewindow and ‘n’ is the refractiveindex of the window material.The depth of the LED image in-side the HSDL-3603, D, is 8 mm.‘A’ is the required half angle forviewing. For IrDA compliance,the minimum is 15° and the maxi-mum is 30°. Assuming the thick-ness of the window to benegligible, the equations result inthe following tables and graphs:DZKAIR TRANSPARENTWINDOWOPAQUEMATERIALOPAQUEMATERIALIR TRANSPARENT WINDOWXYFigure 25. Window design diagram.

## Similar Part No. - HSDL-3603

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## Similar Description - HSDL-3603

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