Optical scanning holography system
AssigneeCubixel Co., Ltd.
InventorTae Geun Kim
Life of this patent
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Abstract
An optical scanning holography system includes a polarization-sensitive lens configured to receive a linearly polarized beam and generate a first spherical wave of right-handed circular polarized light having a negative focal length and a second spherical wave of left-handed circular polarized light having a positive focal length, a first polarizer configured to pass only a beam component therethrough in a predetermined polarization direction among components of the generated first and second spherical waves, a scanning unit configured to scan an object by using an interference beam generated between the first and second spherical waves passing through the first polarizer, and a first photodetector configured to detect a beam reflected from the object.
Claims3
A geometric phase scanning holography system comprising:
- a polarization beam splitter configured to split an incident linearly polarized beam into a p-polarized first beam and a s-polarized second beam that are orthogonal to each other;
- a first quarter wave plate configured to convert the p-polarized first beam into a left-handed circular polarized beam;
- a second quarter wave plate configured to convert the s-polarized second beam into a right-handed circular polarized beam;
- a first collimator configured to expand the left-handed circular polarized beam and provide a plane wave of left-handed circular polarized light;
- a second collimator configured to expand the right-handed circular polarized beam and provide a plane wave of right-handed circular polarized light;
- a first lens configured to convert the plane wave of right-handed circular polarized light from the second collimator into a spherical wave;
- a first beam splitter configured to form an interference beam by overlapping the plane wave of left-handed circular polarized light from the first collimator and the spherical wave of right-handed circular polarized light from the first lens;
- a scanning unit configured to scan an object by using the interference beam;
- a second beam splitter configured to receive a beam reflected from the object and configured to split the received beam into a first output beam and a second output beam;
- a first polarizer and a second polarizer configured to polarize the first output beam and the second output beam respectively;
- and
- a first photodetector and a second photodetector configured to detect the first output beam and the second output beam passing through the first polarizer and the second polarizer respectively.
Dependencies are inferred from the claim text.