《led(tracepro官方led建模光学仿真设计教程)》由会员分享，可在线阅读，更多相关《led(tracepro官方led建模光学仿真设计教程)（16页珍藏版）》请在金锄头文库上搜索。
1、TRACEPRO TUTORIAL LED Requirements Models: None Properties: None Editions: TracePro LC, Standard and Expert Introduction In this example you will build a source model for a Siemens LWT676 surface mount LED based on the manufacturers data sheet. The dimensions will be used to build a solid model and
2、the source output will be defined to match the LED photometric curve. Copyright 2013 Lambda Research Corporation. All Rights Reserved. LED Page 2 TRACEPRO TUTORIAL Create a Thin Sheet First analyze the package to determine the best method of constructing the geometry in TracePro. The symmetry of t
3、he package suggests starting from a Thin Sheet and extruding the top and bottom halves with a small draft angle. Construct Thin Sheet in the XY plane. 1. Start TracePro 2. Select View|Profiles|XY or click the View XY button on the toolbar, and switch to silhouette mode, View|Silhouette. 3. Select In
4、sert|Primitive Solid and select the Thin Sheet tab. 4. Enter the four corners of the Thin Sheet in mm in the dialog box, as shown below, and click Insert. 5. Click the Zoom All button or select View|Zoom|All to see the new object. LED Page 3 TRACEPRO TUTORIAL Selecting a Surface TracePro uses surfa
5、ce and object selections for many operations. 1. Close the Insert Primitive Solid dialog box. The thin sheet object has only one surface. 2. Select View|Profiles|YZ or click the View YZ button on the toolbar to view the profile of the Thin Sheet. 3. Select the surface using by selecting Edit|Select|
6、Surface (or clicking the Select Surface button), then use the mouse to “pick” the rod end, which is Surface 0 as shown in the figure below, After selecting the surface it will be highlighted in black in the model view. LED Page 4 TRACEPRO TUTORIAL Use Sweep to Form a Solid The package has a small a
7、ngle of about 4 degrees so you will extrude the sheet using Edit|Surface|Sweep. 1. Select Edit|Surface|Sweep or right-click on the surface and select Sweep. 2. Enter a sweep distance of 0.9 mm and a draft angle of 4 degrees. 3. Click Apply. The surface will be swept along the planes surface normal,
8、in this case along the Z axis. 4. Make sure Surface 4 is selected for the next sweep to complete the object. LED Page 5 TRACEPRO TUTORIAL Complete the Solid Perform two more sweep operations to complete the solid according to the data sheet. 1. Select Surface 4. 2. Sweep by 0.2 with draft=0 to crea
9、te the central portion of the package. 3. Select Surface 8. 4. Sweep again by 0.9 with a 4 degree draft to complete the construction. LED Page 6 TRACEPRO TUTORIAL Create a Conical Hole Next you can add the cone reflector which holds the LED die. To create the conical hole, first create a cone, then
10、 perform a Boolean Subtract operation. 1. Select Insert|Primitive Solid and select the Cylinder/Cone tab. 2. Select the Cone option and enter the values shown, then click Insert to create the cone. LED Page 7 TRACEPRO TUTORIAL Subtract the Cone from the Package Boolean Operations use a concept of B
11、ody and Tools. The Body is the item you wish to keep and the tools are items which will have some effect on the Body. Here you want to remove the volume occupied by the cone from the package. In this example the Body is the package and the Tool is the cone. 1. Select the Package object from the Syst
12、em Tree by clicking on the Thin sheet 1 object. 2. Select the Cone 1 object from the System Tree using Ctrl+Click to add it to the selection. 3. Select Edit|Boolean|Subtract or use the Boolean Subtract button as shown in the figure. 4. Cone 1 will be removed from the System Tree as shown in the bott
13、om figure with 15 surfaces shown in the Thin Sheet Object LED Page 8 TRACEPRO TUTORIAL Add a Diffuser You also need to add a diffuser. This will be a thin cylinder joined to the package. You will make the inner surface of the diffuser scattering and the inside of the cone a perfect mirror. 1. Selec
14、t Insert|Primitive Solid, Cylinder/Cone tab. 2. Enter the values shown, Major Radius 1.2, Length .01 and Base Position 1.99. 3. Click Insert to create the cylinder. LED Page 9 TRACEPRO TUTORIAL Add the LED Now you will add the LED chip itself. The dimensions are not given, but you can estimate from
15、 the data sheet that it is 0.4 x 0.4 x 0.15 mm. 1. From the Insert|Primitive Solid dialog box, select the Block tab 2. Enter the values shown in the Block dialog shown below. Make sure you name the object by typing LED in the Name box 3. The center of the LED has a Z-value 1.175 to position the bloc
16、k so that it is on the bottom of the conical hole. 4. Click Insert to create the block. 5. The other 2 objects could have been named when they were created, but they can also be renamed at any time. Select each object in turn with 2 slow clicks to get the name in edit mode, then name them “Package”, and “Diffuser”. LED www.lambdar
