Holographic reconstruction device and method

Abstract

The present disclosure relates to improved holographic reconstruction device and a method. In one aspect, the present disclosure relates to improved holographic reconstruction device and method that can measure a digital hologram regardless of optical characteristics of an object to be measured, by an all-in-one type system integrating a transmissive system that measures an object transmitting light and a reflective system that measures an object reflecting light.

What is claimed is: 
     
         1 . A holographic reconstruction device comprising:
 a first beam splitter configured to split single wavelength light into a first transmitted beam and a second transmitted beam;   a plurality of optical mirrors configured to reflect the first transmitted beam toward an object to be measured;   a second beam splitter configured to split the second transmitted beam into a first reflected beam and a second reflected beam;   an object beam objective lens configured to allow the first transmitted beam to pass through the object or the first reflected beam to pass therethrough;   a reference beam objective lens configured to allow the second reflected beam to pass therethrough;   a position adjustment mirror configured to transmit the second reflected beam passing through the reference beam objective lens;   a recording medium configured to record an interference pattern formed based on two or more of the first transmitted beam, the second transmitted beam, the first reflected beam, or the second reflected beam, entering the second beam splitter; and   a processor configured to receive and store an image file generated by converting the interference pattern transmitted from the recording medium, wherein   the processor is configured to selectively acquire a beam transmitting object hologram for the object and a beam reflecting object hologram for the object according to a transmissive mode and a reflective mode.   
     
     
         2 . The holographic reconstruction device of  claim 1 , wherein the beam transmitting object hologram is expressed as a complex conjugated hologram corresponding to an interference pattern for a beam transmitting part of the object as in Equation 1 below:
   | U   T ( x,y, 0)| 2   =|O   T ( x,y )| 2   +|R   T ( x,y )| 2   +O*   T ( x,y ) R   T ( x,y )+ O   T ( x,y ) R*   T ( x,y )  (1)
   wherein x and y denote spatial coordinates, U T (x,y,0) denotes the acquired beam transmitting object hologram, O T (x,y), R T (x,y) denote an object beam and a reference beam of the beam transmitting object hologram, and O* T (x,y), R* T (x,y) denote complex conjugates of the object beam and the reference beam of the beam transmitting object hologram.   
     
     
         3 . The holographic reconstruction device of  claim 1 , wherein the beam reflecting object hologram is expressed as a complex conjugated hologram corresponding to an interference pattern for a beam reflecting part of the object as in Equation 2 below:
   | U   R ( x,y, 0)| 2   =|O   R ( x,y )| 2   +|R   R ( x,y )| 2   +O*   R ( x,y ) R   R ( x,y )+ O   R ( x,y ) R*   R ( x,y )  (2)
   wherein x and y denote spatial coordinates, U R (x,y,0) denotes the acquired beam reflecting object hologram, O R (x,y), R R (x,y) denote an object beam and a reference beam of the beam reflecting object hologram, and O* R (x,y), R* R (x,y) denote complex conjugates of the object beam and the reference beam of the beam reflecting object hologram.   
     
     
         4 . The holographic reconstruction device of  claim 2 , wherein the beam transmitting object hologram is the interference pattern formed for the beam transmitting part of the object, by the first transmitted beam and the second transmitted beam. 
     
     
         5 . The holographic reconstruction device of  claim 3 , wherein the beam reflecting object hologram is the interference pattern formed for the beam reflecting part of the object to be measured, by the first reflected beam and the second reflected beam. 
     
     
         6 . The holographic reconstruction device of  claim 1 , wherein:
 the processor is configured to correct a difference in an optical path of light in the transmissive mode and the reflective mode by adjusting a position of the position adjustment mirror, and   the beam transmitting object hologram and the beam reflecting object hologram are configured to be transmitted from the recording medium to the processor to be acquired in the form of an image file.   
     
     
         7 . The holographic reconstruction device of  claim 1 , further comprising a light source unit configured to emit the single wavelength light. 
     
     
         8 . The holographic reconstruction device of  claim 1 , wherein the first and second transmitted beams are configured to meet at the second beam splitter to form the beam transmitting object hologram. 
     
     
         9 . The holographic reconstruction device of  claim 8 , wherein the first transmitted beam corresponds to an object beam of the beam transmitting object hologram, and wherein the second transmitted beam corresponds to a reference beam of the beam transmitting object hologram. 
     
     
         10 . The holographic reconstruction device of  claim 1 , wherein the first and second reflected beams are configured to meet at the second beam splitter to form the beam reflecting object hologram. 
     
     
         11 . The holographic reconstruction device of  claim 10 , wherein the first reflected beam corresponds to an object beam of the beam reflecting object hologram, and wherein the second reflected beam corresponds to a reference beam of the beam reflecting object hologram. 
     
     
         12 . The holographic reconstruction device of  claim 1 , wherein the interference pattern is configured to be formed when 1) the first transmitted beam transmitted through the object or the first reflected beam reflected from a surface of the object and 2) the second reflected beam passing through the reference beam objective lens and reflected from the position adjustment mirror respectively pass through the object beam objective lens and the reference beam objective lens and are subsequently transmitted to the second beam splitter. 
     
     
         13 . A holographic reconstruction device comprising:
 a first beam splitter configured to split single wavelength light into a first transmitted beam and a second transmitted beam;   a plurality of optical mirrors configured to reflect the first transmitted beam toward an object to be measured;   a second beam splitter configured to split the second transmitted beam into a first reflected beam and a second reflected beam;   an object beam objective lens configured to allow the first transmitted beam to pass through the object or the first reflected beam to pass therethrough;   a reference beam objective lens configured to allow the second reflected beam to pass therethrough;   a position adjustment mirror configured to transmit the second reflected beam passing through the reference beam objective lens; and   a recording medium configured to record an interference pattern formed based on two or more of the first transmitted beam, the second transmitted beam, the first reflected beam, or the second reflected beam, entering the second beam splitter.   
     
     
         14 . The holographic reconstruction device of  claim 13 , further comprising a light source unit configured to emit the single wavelength light. 
     
     
         15 . The holographic reconstruction device of  claim 13 , further comprising:
 a processor configured to receive and store an image file generated by converting the interference pattern.   
     
     
         16 . The holographic reconstruction device of  claim 15 , wherein the processor is further configured to selectively acquire a beam transmitting object hologram for the object and a beam reflecting object hologram for the object according to a transmissive mode and a reflective mode. 
     
     
         17 . The holographic reconstruction device of  claim 16 , wherein the first and second transmitted beams are configured to meet at the second beam splitter to form the beam transmitting object hologram for a beam transmitting part of the object, wherein the first transmitted beam corresponds to an object beam of the beam transmitting object hologram, and wherein the second transmitted beam corresponds to a reference beam of the beam transmitting object hologram. 
     
     
         18 . The holographic reconstruction device of  claim 16 , wherein the first and second reflected beams are configured to meet at the second beam splitter to form the beam reflecting object hologram for a beam reflecting part of the object, wherein the first reflected beam corresponds to an object beam of the beam reflecting object hologram, and wherein the second reflected beam corresponds to a reference beam of the beam reflecting object hologram.