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AssigneeXi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences
InventorsRuyi Wei, Lamei Di
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The present disclosure relates to a common-path cube-corner retroreflector interferometer with a large optical path difference and high stability, and an interference technique thereof. The interferometer adopts an asymmetric common-path beam splitting structure using right-angled cube-corner retroreflectors, comprising a semi-transmissive and semi-reflective beam splitter, a plane mirror, a first right-angled cube-corner retroreflector, a second right-angled cube-corner retroreflector and an optical path difference element. The incident light is divided into a first transmitted beam and a second reflected beam, which are respectively reflected by the plane mirror and the right-angled cube-corner retroreflectors several times and then split again, two beams of which become interference outputs along directions perpendicular to an incident direction of the incident light, and the other two beams become interference outputs along directions parallel to the incident light. The present disclosure also provides an interference technique based on the interferometer described above.
A common-path cube corner interferometer, comprising:
Dependencies are inferred from the claim text.
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Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows: using focussing or collimating elements, e.g. lenses or…
By correlation of the amplitudes: devices of compact or symmetric construction
Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows: having a through-hole enabling the optical element to fulfil…
Investigating the spectrum: interferometric spectrometry
About 14 years 6 months of term left · ends 26 Apr 2041 (estimated)
This patent application claims the benefit and priority of Chinese Patent Application No. 202010344002.8, filed on Apr. 27, 2020, the disclosure of which is incorporated by reference herein in its entirety as part of the present application.
The present disclosure relates to a cube corner interferometer used in the spectrum measurement technology, and in particular to a common-path cube-corner retroreflector interferometer with a large optical path difference and high stability, and an interference technique thereof.
Interferometers utilize the superposition of waves to obtain phase information of waves, so as to obtain physical quantities of concern for experiments. Interferometers are widely used in precision measurement fields such as astronomy, optics, engineering surveying, oceanography, spectrum analysis, remote sensing, and radars.
FIG. 1 is a schematic diagram of an optical path when right-angled cube-corner retroreflectors are used instead of plane mirrors according to the present disclosure;
FIG. 2 is a schematic diagram of changing optical paths by using several optical path difference elements provided in the present disclosure, in which (a) is a square prism, (b) is a trapezoidal prism, and (c), (d) and (e) are all combinations of plane mirrors;
FIG. 3 is a schematic diagram of optical paths of the common-path cube-corner interferometer according to Embodiment 1 of the present disclosure;
Reference Numerals in the Drawings Include:
1 incident light, 2 semi-transmissive and semi-reflective beam splitter, 3 first right-angled cube-corner retroreflector, 4 second right-angled cube-corner retroreflector, 5 plane mirror, 6 optical path difference element.
The present disclosure will be described in detail with reference to figures and specific embodiments below.