Park Medical Systems Inc.

Spg Hydro International Inc.

Novacam Tyechnologies Inc.

Miljenko Lucic

Vuk Bartulovic

Abel Ferreira

Yves Richer

Gabriele Zacek

Three techniques applicable to photogrammetric systems are taught. The first one is for performing camera position approximation, wherein an image is taken and using this image, it is possible to approximate the position the camera was in when taking the picture. The second technique is for reconstructing planar objects using one image with the planar object present in the image. The third technique is a precision estimation method of reconstructed points. The system performs for each points of interest a simulation of the physical process of image capture, calibration, and reconstruction. The simulation is based on the given tolerances for the system parameters.

Techniques for photogrammetric systems

A method for measuring such parameters as height, position, shape, colinearity, and coplanarity of arrays of minute objects on the surface of integrated circuits, such as Ball Grid Arrays (BGA), all in one simple and straight forward procedure during the manufacturing process of integrated circuits. Shadows of the objects are created on the substrate through the use of x-rays or other light sources placed at predetermined distances and angles from the objects. An imaging device obtains images from the shadows cast onto the substrate and the images are then analyzed to determine if they meet predefined parameters. Multiple sources of illumination can be used to illuminate the array in order to create a more precise image for analysis and three dimensional images of the BGA can be created for analysis.

Inspection of ball grid arrays (BGA) by using shadow images of the solder balls

For accurate position calculation of scintillation events in a gamma camera, photodetector signals are processed based on small groups of photodetectors surrounding the scintillations. Relative position correction and energy correction is carried out based on rough position values relative to the group of photodetectors, taking into consideration the number of the center photodetector and the sum of all photodetector signals in the group.

Growing community of inventors

Lachine, Canada

Miljenko Lucic