Method and device for scanning optical fault image
A technology of image scanning and optical tomography, used in measurement devices, material analysis and diagnosis through optical means, etc., can solve the problem of poor resolution, decreased signal-to-noise ratio of interference signals, and inability to accurately know the change of refractive index of medium 11, etc. problem, to achieve the effect of reducing the scattering effect and the difficulty of erection
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[0043] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of four embodiments with reference to the accompanying drawings.
[0044] For convenience of description, in the following embodiments, the same elements are denoted by the same reference numerals.
[0045] refer to Figure 4 , the first preferred embodiment of the optical tomography scanning method and device thereof of the present invention includes a dual-frequency beam generating unit 3 , a relay beam splitter 41 , a focusing lens 42 and a signal processing unit 5 .
[0046] The dual-frequency beam generating unit 3 includes a low-coherence light source 31 such as a super-brightness diode (SLD), through a polarizer (polarizer) 32 that can adjust the polarization angle to generate a 45° linearly polarized beam, by a polarizer The polarizing beam splitter (Polarizing Beam Splitter, PBS) 33'' divides the linearl...
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