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AssigneeVysoke Uceni Technicke V Brne
InventorsRadim Chmelik, Pavel Kolman, Tomas Slaby, Martin Antos, Zbynek Dostal
Estimating the term…
In the interferometric system, the image plane is imaged by an output imaging setup via a transmission system of reflectors to the output plane and a reflection type diffraction grating is located in the image plane of an imaging setup of a reference branch. The transmission systems of reflectors are adjusted so that axes of both branches coincide at an entrance to the output plane and parallel with a normal line of the output plane, and an axial beam, diffracted by the reflection type diffraction grating at an angle α, enters into the output plane at an angle β, and the relation between angle β and α is sin(β)=sin(α)/m, where m is a magnification of the output imaging setup. The system enables the achievement of a holographic imaging of an object by low-coherence waves. Incoherent waves allow the imaging of objects immersed in scattering media.
An interferometric system with a spatial carrier frequency capable of imaging in a polychromatic radiation consisting of an extended temporally and spatially incoherent source of waves, after which a wave splitter is inserted, which splits the incoming waves into two separated branches of the interferometer, specifically into a first branch and a second branch, where on the axis of the first branch an arbitrarily designed first imaging setup is located and on the axis of the second branch a second imaging setup is located, which must be identical with the first imaging setup with respect to both the times of propagation of waves and the magnification, and the image plane of the first imaging setup of the first branch is with respect to the first imaging setup an image of the first object plane of this imaging setup and simultaneously the image plane of the second imaging setup of the second branch is with respect to the second imaging setup an image of the second object plane of this imaging setup, and the interferometric system further contains a detector located in the output plane of the interferometer, and the difference of time of propagation of the waves in the first and the second branch is smaller than the coherence time of the used waves measured from a beam splitting point at the wave splitter up to the output plane of the interferometer wherein after the image plane of the first imaging setup of the first branch and before the output plane of the interferometer a first output imaging setup is located and after the image plane of the second imaging setup of the second branch and before the output plane of the interferometer a second output imaging setup is located, and at least in one branch, between the relevant imaging setup of the given branch and the output plane of the interferometer, is located a first transmission system of reflectors in the first branch and a second transmission system of reflectors in the second branch, which are arranged in such a way that the axis of the first branch and the axis of the second branch coincide before an entrance to the output plane of the interferometer and they are parallel with a normal line of the output plane of the interferometer, and further that the output plane of the interferometer is with respect to the first output imaging setup an image of the image plane of the first imaging setup of the first branch and with respect to the second output imaging setup it is an image of the image plane of the second imaging setup of the second branch, and the total magnification between the first object plane of the first imaging setup of the first branch and the output plane of the interferometer is equal to the total magnification between the second object plane of the second imaging setup of the second branch and the output plane of the interferometer, and a beam of waves travelling on the axis of the first imaging setup of the first branch enters into the first output imaging setup on its axis and exits from it also on its axis and enters into the output plane of the interferometer in the direction of its normal line, and in a vicinity of the image plane of the second imaging setup of the second branch a diffraction grating is located and a beam of waves travelling on the axis of the second imaging setup of the second branch and diffracted by the diffraction grating at an angle (α) enters into the second output imaging setup also at the angle (α) with respect to the axis of this second output imaging setup and exits from this second imaging setup with respect to its axis at an angle (β) and enters into the output plane of the interferometer with respect to its normal line also at the angle (β), and the relation between angles (β) and (α) is sin(β)=sin(α)/m where m is a magnification of the second output imaging setup.
An interferometric system with a spatial carrier frequency capable of imaging in polychromatic radiation consisting of an extended temporally and spatially incoherent source of waves, after which a wave splitter is inserted, which splits the incoming waves into two separated branches of the interferometer, specifically into a first branch and a second branch, where on the axis of the first branch an arbitrarily designed first imaging setup is located and on the axis of the second branch a second imaging setup is located, which must be identical with the first imaging setup with respect to both the times of propagation of waves and the magnification, and the image plane of the first imaging setup of the first branch is with respect to the first imaging setup an image of the first object plane of this imaging setup and simultaneously the image plane of the second imaging setup of the second branch is with respect to the second imaging setup an image of the second object plane of this imaging setup, and the interferometric system further contains a detector located in the output plane of the interferometer, and the difference of time of propagation of the waves in the first and the second branch is smaller than the coherence time of the used waves measured from a beam splitting point at a wave splitter up to the output plane of the interferometer wherein after the image plane of the first imaging setup of the first branch and before the output plane of the interferometer a first output imaging setup is located and after the image plane of the second imaging setup of the second branch and before the output plane of the interferometer a second output imaging setup is located, and at least in one branch, between the relevant imaging setup of the given branch and the output plane of the interferometer, is located a first transmission system of reflectors in the first branch and a second transmission system of reflectors in the second branch, which are arranged in such a way that the axis of the first branch and the axis of the second branch coincide before an entrance to the output plane of the interferometer and they are parallel with a normal line of the output plane of the interferometer, and further that the output plane of the interferometer is with respect to the first output imaging setup an image of the image plane of the first imaging setup of the first branch and with respect to the second output imaging setup it is an image of the image plane of the second imaging setup of the second branch, and the total magnification between the first object plane of the first imaging setup of the first branch and the output plane of the interferometer is equal to the total magnification between the second object plane of the second imaging setup of the second branch and the output plane of the interferometer, and in a vicinity of the image plane of the first imaging setup of the first branch is located a first diffraction grating, and a beam of waves travelling on the axis of the first imaging setup of the first branch and diffracted by the first diffraction grating at an angle (α1) enters into the first output imaging setup also at the angle (α1) with respect to the axis of this first output imaging setup and exits from this first output imaging setup with respect to its axis at an angle (β1) and enters into the output plane of the interferometer with respect to its normal line also at the angle (β1), and the relation between angles (β1) and (α1) is sin(β1)=sin(α1)/m1 where m1 is a magnification of the first output imaging setup, and in a vicinity of the image plane of the second imaging setup of the second branch is located a second diffraction grating and a beam of waves travelling in on the axis of the second imaging setup of the second branch and diffracted by the second diffraction grating at an angle (α2) enters into the second output imaging setup also at the angle (α2) with respect to the axis of this second output imaging setup and exits from this second output imaging setup with respect to its axis at an angle (β2) and enters into the output plane of the interferometer with respect to its normal line also at the angle (β2), and the relation between angles (β2) and (α2) is sin(β2)=sin(α2)/m2 where m2 is a magnification of the second output imaging setup.
Dependencies are inferred from the claim text.