velocimetry.net

CAMERA FORMAT
The size of the camera's imaging device (CCD) also affects the angle of view, with the smaller devices creating
narrower angles of view when used on the same lens. The format of the lens, however, is irrelevant to the angle
of view, it merely needs to project an image which will cover the device, i.e.: the same format of the camera or
larger. This also means that 1/3" cameras can utilize the entire range of lenses from 1/3" to 1", with a 1/3" 8mm
lens giving the same angle as a 2/3" 8mm lens. The latter combination also provides increased resolution and
picture quality as only the centre of the lens is being utilized, where the optics can be ground more accurately.

http://www.alrad.co.uk/datasheets/Imagi ... NOLOGY.pdf

Thanks Mr. Siva for refereing our website. I hope we have done the good justice for PIV.

Regarding your query: Yes without using PDPA, You can find the diameter of the spray by using PIV and PLIF (pLANAR LASER INDUCED FLUORESCENCE)

Using PLIF, the intensity of the image what you are capturing is proprotional to volume
and using PIV, the internsity of the image what you are capturing is proportional to area

Sauter Mean Diameter , SMD = VOLUME/ AREA = DIAMETER OF THE SPRAY