Question

An optical beam measures the distance of an object moving from point A to Point B. The PSD has a pixel size of 0.22mm, determine the number of pixels the beam has moved by.

Y=310mm

Z=200mm

W=50mm

U=300mm

"A" point Y “B” point N Lens Lens W LED Х Position Sensing Device (PSD) U

Answer 1

L H lan Bo BG 1 OG fan LAOH B 4G AH OH LBOG LD OF 2 AOH = L DOE Lo D Lu

. Now E F = DF - 11 OD fun LDO F op tan /DOR w dan LBOG W fon LAOH wX- U w x ytz WX Ytz Z 300 50X 300 50 X 310 + 200 2 50 X 300 ( 12.00 sie) $ 000 310 45.588 mm 102.000 Number of pixels pènels is es ; 45.588 207 Oo22 the beam will move by 207 pixels