Study of a modified IR defusing surface as a uniform source and its application as non-contact level sensor

Defusing light is the light reflection from a non uniform surface so that after reflection the light rays can move in different directions. Defusing light with uniform intensity in all direction is very important in various applications. In the present paper, design of a modified defusing surface for uniform IR light has been studied and the effect of new base plate material that surface on intensity of diffused IR light has been observed. Application of this modified diffusing surface in developing a non contact level sensor using float as the sensing element has also been observed as in [8]. Mathematical equations explaining the principle of operation of the sensor are identical to those in [8] and are applied in the present work. The sensor with the modified defusing surface has been experimentally studied. Experimental results almost identical to those in [8] are reporter in the paper.