Polarization state parameter measuring device and method based on transmission point diffraction type common digital holography
A technology of digital holography and measuring devices, applied in measuring devices, optical radiation measurement, and measuring the polarization of light, can solve problems such as complex structure, difficult adjustment, crosstalk, etc. The effect of high utilization
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Embodiment approach 1
[0039] Implementation mode one: if figure 1 As shown, a polarization state parameter measurement device based on transmission point diffraction co-channel digital holography includes a light source with a wavelength of λ, a 45° linear polarization modulation system, and a collimated beam expander system. The device also includes a first lens, a second A non-polarizing beam splitting prism, hole array, second lens, second non-polarizing beam splitting prism, first plane mirror, second plane mirror, third lens, polarizing beam splitting prism, image sensor and computer; the light beam emitted by the light source passes through Modulated by a 45° linear polarization modulation system to form a linearly polarized beam, which passes through the object to be measured, the first lens, the first non-polarizing beam splitter, the hole array, and the second lens in sequence after being collimated and expanded by the collimator beam expander system 1. Two beams of light are formed after ...
Embodiment approach 2
[0040] Embodiment 2: On the basis of Embodiment 1, the first plane reflector is placed perpendicular to the optical axis and the second plane reflector is placed obliquely at an angle θ to the optical axis, and the angle θ does not include 90°; or the first The plane reflector is placed obliquely at an angle θ to the optical axis and the second plane reflector is placed perpendicular to the optical axis, and the angle θ does not include 90°.
Embodiment approach 3
[0041] Embodiment 3: On the basis of Embodiment 1 or 2, the pinholes B on the hole array are reflected by the first plane mirror or the second plane mirror placed obliquely at an angle of θ with the optical axis and then focused by the second lens spot matching.
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