The default number of bumps is 100 (10 X 10). You need to change these {[#)Q.2
parameters to match your design. Note that LightTools allows many other 8!|vp7/
placement options, but you will use the Bezier placement option for this 9vP;i= fr
example. mDz44XO
5.On both the X Placement tab and Y Placement tab, change the Number of F oC
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Bumps parameter to 300, as shown in the following figure. Click Apply after ,z.l#hj,{
each change. ewd
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6.Click OK to close the dialog box. kr+p&|.
Note that the number of bumps is 300 X 300, which results in about 90,000
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bumps on the surface (~ 5143 bumps/in2). These bumps are arranged in a Awa| (]
manner defined by the Bezier parameterization option. Please see Chapter 5 of lS9S7`
the LightTools Core Module User’s Guide for more information. With the .iy>N/u
current parameter values, the Bezier option varies the bump spacing along the _|US`,kfc
length of the light guide. The spacing in the orthogonal direction is constant. tkZUjQIX
The X and Y refer to the local coordinate system of the surface. D&F{0
LightTools Introductory Tutorial * 91 R/x3+_.f
Q k}RcP
HAPTER 5 Introduction to Backlight Design D&pn@6bB
C ;Tr,BfV|Bf
Examining Surface Properties m6[}KkW
Using the methods described in previous chapters, you may want to check your ymxA<bICS8
model before you run a simulation. />mK.FT
Click on various parts of the model in the 3D Design View. Or use the System f~wON>$K
Navigator to select different surfaces and view their Properties. X PyDZk/m
1.In the System Navigator, click to open BottomSurface of the LightGuide, then "x9yb0
click Zones, and then click Texture. j~>{P=_}
2.Select SphericalElement, and then right-click and select Properties from the J@:Q(
shortcut menu. The Shape tab shows you a graphical representation of the Oe1WnS 7(]
spherical bump shape that is the bottom of the light guide. wp&G