Optical phase retarder for measuring length of ocular axis
A technology of optical phase and axial length of the eye, applied in the direction of eye testing equipment, applications, medical science, etc., can solve the problems of complex adjustment, limited scanning range, low energy utilization rate, etc., to eliminate system dispersion and reduce scanning length , the effect of simple structure
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[0012] In order to achieve high stability, large scanning range, and rapid eye axial length measurement, the prism axial optical delay technology is used to realize fast scanning of the anterior segment and posterior segment of the eye, and finally achieve eye axial length measurement; the specific implementation methods are as follows: figure 1 The schematic diagram of the structure of the optical phase retarder is shown, and the axial scanning optical delay line is composed of a fixed large rectangular prism 1 and movable rectangular prisms 2 and 3; the rectangular prisms 2 and 3 are stacked up and down on a translation platform 5, The right-angled prisms 2 and 3 are moved synchronously by the translation table 5 driven by the motor 6; the right-angled prism 3 is a square or rectangular right-angled prism, and part of the small right-angled side is removed to form one side and the hypotenuse of the triangular right-angled prism 2. There are right-angled trapezoidal right-angl...
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