HSDL-3202 datasheet(14/16 Pages) HP

Part #	HSDL-3202

Description	IrDA짰 Data 1.3 Low Power Compliant 115.2 Kb/s Infrared Transceiver

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Manufacturer	HP [Agilent(Hewlett-Packard)]

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14

Shape of the Window

From an optics standpoint, the

window should be flat. This en-

sures that the window will not

alter either the radiation pattern

of the LED, or the receive pattern

of the photodiode.

If the window must be curved for

mechanical design reasons, place

a curve on the back side of the

window that has the same radius

as the front side. While this will

not completely eliminate the lens

effect of the front curved surface,

it will reduce the effects. The

amount of change in the radiation

pattern is dependent upon the

material chosen for the window,

the radius of the front and back

curves, and the distance from the

back surface to the transceiver.

Once these items are known, a

lens design can be made which

will eliminate the effect of the

front surface curve.

The following drawings show the

effects of a curved window on the

radiation pattern. In all cases,

the center thickness of the win-

dow is 1.5 mm, the window is

made of polycarbonate plastic,

and the distance from the trans-

ceiver to the back surface of the

window is 3 mm.

Flat Window

Curved Front, Flat Back

(This option is not recommended

and should not be used.)

Curved Front and Back

(This option can be used if neces-

sary for application purpose. A

large radius of curvature is

recommended and both front and

back should have the same

radius.)

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HSDL-3202 Datasheet(PDF) 14 Page - Agilent(Hewlett-Packard)

HSDL-3202 Datasheet(HTML) 14 Page - Agilent(Hewlett-Packard)

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