Handed out 110208 and should be returned 110222

Home examination tasks no 2

A hologram shall be made from a painting 120cm x 160 cm.

Sketch a setup in accordance with fig 6.2 in the book, giving "reasonable" demands on the equipment. Coherence lengths should not exceed 1 m

All measures, coherence lengths, line density reproduction should be stated

Examination tasks in optical metrology 3.

Ii one laser triangulation method the area of interest is illuminated by a laser beam traversing the field of view at an angle, thus illuminating the object to which distance is to be measured. This has to be calibrated.

Assume 1000 x 1000 pixles and that the centroid of illumination can be determined with an accuracy of 0,2 pixles.

Let z be the distance along the symmetry axis from the lens to the object which is illuminated by the beam.

Calibration gives that for z=5,000cm the centroid is at

Pixel : x=287,4 y=500,0

z= 10,000cm gives

Pixel: x=702,2 y=500,0

Where (in pixel coordinates) will z=7,500 cm be recorded? What is the accuracy of that measurement?

It is not a linear relation!