Zero-optical path difference interfering optical element
A technology of zero optical path difference and optical devices, which is applied in optical radiation measurement, scientific instruments, and measuring the polarization of light, etc., can solve the problem of not being able to obtain multiple polarization components and total light intensity at the same time, image registration errors cannot be eliminated, and evaluation Difficulties and other problems, to achieve the effect of simple structure, clear interference fringes, and no vibration
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[0025] see figure 1 , the zero optical path difference interference optical device is a pentagonal pentagonal prism in the present embodiment, the lower left corner in the pentagon is a right-angled corner, and other corners are 112.5 °; in the pentagon, with An adjacent side of a right-angled edge is the first side, and the sides in the clockwise direction from the first side are the second side, the third side, the fourth side and the fifth side; the length ratio of each side is: The first side: the second side: the third side: the fourth side: the fifth side is 4:4:3:4:4, and the thickness of the pentaprism is half of the length of the first side;
[0026] The pentaprism is divided as follows:
[0027] Such as image 3 As shown, take the right-angled corner in the pentaprism as the lower left corner, take the thickness of the pentaprism as the side length, divide a cube as the optical path deflection unit 2, and the remaining part constitutes the optical path reflection u...
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