The polarization parameters of light transmitted through biological cells contain morphological and functional
information for biomedical purposes. As more imaging became available to research applications, Mueller
imaging’s importance has increased regularly in biomedical approach over the years. This paper summarizes
the context of Mueller imaging and polarization optical analysis on blood cells for medical applications.
Basically this method is related to Mueller Matrix Imaging Polarimetry. Knowing all 16-element Mueller
matrix using 36 independent polarization states completely describes the blood cells in terms of birefringence
The proposed work describes optical transformations such as Fourier transformation and Fresnel transformation based
encryption and decryption of images using random phase masks (RPMs). The encrypted images have been embedded in
some secret cover files of other formats like text files, word files, audio files etc to increase the robustness in the security
applications. So, if any one wants to send confidential documents, it will be difficult for the interloper to unhide the
secret information. The whole work has been done in MATLAB®
The wavefront of circular dark-hollow-beams with wavelength produces a helix of pitch m, where m is an integer. But the central phase singularity of such beams can also be generated reducing the pitch by using a modulo operation. When such a beam interferes destructively with an unmodified annular beam of the same order, an incomplete annular beam is produced. The final beam, generated using a standard computer-generated holographic procedure, retains its shape up to 1.5 cm. A potential use of such beams for manipulation of microorganisms has been indicated through a dynamic holographic procedure using a spatial light modulator.
We report a systematic investigation on the imaging behavior of an optical system consisting of a lens made of a uniaxial birefringent crystal sandwiched between two linear polarizers with the introduction of prespecified off-axis aberrations such as astigmatism and coma. The intensity point spread function is used as the image assessment parameter. It has been shown that for a point object, the proposed system has higher tolerance to the presence of off-axis aberrations than an imaging system formed by an ordinary glass lens. Some specific cases are computed and illustrated graphically.