Dynamic measurements using a laserinterferometer working with polarized light

A measurement technique for determination of intraocular pressure is propos ed in case of which the complete time response of the deformation of the co rnea surface during the action of an air puff and also the damped vibration after that are used to obtain the measuring values. For application of las ers to biological objects, especially to eyes it should be taken into consi deration that only very low radiation power is permissible, the measuring s urfaces are spherically shaped and have a low reflectivity. Through this a high detector sensitivity is necessary, which causes a limitation of the dy namic measuring range. The dynamic behaviour of the measuring set-up was ch ecked; under the condition that the radiation power is < 50 mu W at the mea suring point a maximum target: velocity of 35 cm/s is to detect reliably. E xaminations of different test objects demonstrate the applicability of this measurement technique.