1. Alessandro Nastro Laboratory of Optoelectronics, University of Brescia 2D Vision Course Creating and Projecting Fringes

2. Alessandro Nastro Purpose of the project:  Implement an optic triangulation system and develop a VI to create fringes and project them. Data: α = 30° γ = 90° FW = 400mm FH = 300mm α

3. Alessandro NastroInstrumentation:  Projector Philips PicoPix PPX2055 Display technology..................................WVGA 0,3" DLP Light source............................................................RGB LED Resolution......................................... 854×480 pixel (16:9) Screen distance........................................... 0,5 m up to 3 m Power Supply....................................................via USB Y plug Brightness (Bright Mode)......................... up to 55 lumen Projected image size........................................12–120 inch (30-304 cm) Dimensions (L×H×W)............................72×27×72mm Weight........................................................................0,11 5kg Camera Basler Scout scA1390-17gm Sensor………………………………………………………………………. ICX267AL Sensor type……………………………………………………………………….. CCD Sensor diagonal Diagonal............................................. 8 mm (Type 1/2) Resolution………………………………………………………… 1392 x 1040 pixel Pixel width……………………………………………………………………. 4.65 μm Pixel height…………………………………………………………………….4.65 μm Transfer type………………………………………………………. Interline transfer Interface type…………………………………………………….. Gigabit Ethernet Indication of lens category to be used……………………………….. C-Mount

4. Alessandro Nastro Implementation : f [mm]d [mm] 8500 161005 251569,9 352190 503139,9 so 156,9 Distance (mm): 300

5. Alessandro Nastro  Load Master and Calibration info  Acquire Master and calculate calibration info  Save Calibration info  Create and Save viewfinder Image  Project Acquire and Save viewfinder Image  Create and Save a Fringes Patterns  Project Acquire and Save Fringes pattern  Create, Project, Save a Series of Fringes Images  Apply Calibration on the acquired image  Use line profile at a specific line  Determinate Period (pix, mm) VI steps:

6. Alessandro Nastro Structure of the VI  Producer-Consumer VI  2 State-Machine: - 7 state ( Init, idle, calibration, center, fringes, application of Calibration, Stop )  - 3 state ( Idle, Analysis, Stop )  6 SubVI: Calibration Center Fringes AutoFringes LineProfile Monitor

7. Alessandro Nastro Monitor SubVI

8. Alessandro Nastro AutoFringes SubVI

9. Alessandro Nastro Fringes State: Front Panel

10. Alessandro Nastro Fringes State: Block Diagram

11. Alessandro Nastro Application:  This technique of projecting fringes can be used in a scanner 3D.