39 results about "Optical data processing" patented technology

A light control and display technology applicable to light redirection and projection with the capacity, in a number of embodiments modified for particular applications, to produce managed light, including advanced images. Applications include miniature to very large scale video displays, optical data processing, 3-dimensional imaging, and lens-less vision enhancement for poor night-driving vision, cataracts and macular degeneration.

The invention relates to a device and method for measuring optical rotation by elastic optical modulation, which belongs to the field of application research of elastic optical polarization modulation; it provides a real-time, high-speed, high-precision and high-sensitivity optical rotation measuring device and method; the invention is based on elastic It is realized by optical polarization modulation technology, differential balance detection technology and digital phase-locked amplification technology. When the light intensity of the optical path and the detection optical path are the same, the differential output modulates the AC signal carrying the optical rotation information, and the detector outputs a DC signal. After the AC signal is pre-amplified, it is collected by AD and input to the FPGA to complete digital phase-locking. The DC signal is low-pass filtered. , collected by AD and input to FPGA, together with the digital phase-locked data, transmitted to the computer, and finally, the computer completes the optical rotation data processing, storage and display; the present invention is mainly used in the application of elasto-optical polarization modulation and optical rotation measurement.

An optical data processing apparatus reads and / or writes data from / on a data storage medium, in which first and second data storage layer are stacked. The apparatus includes: a light detector including at least one photodetector for generating a light quantity signal; a detecting optical system for guiding reflected light beams from a storage layer; and a signal processor for generating a layer sensing signal from the light quantity signal and determining, by the layer sensing signal, the type of data storage medium. The light detector includes a layer sensing photodetector arranged in view of an of an area of the light detector, and further includes a photodetector which is different from the layer sensing photodetector which receives the reflected light beam to generate a focus signal.

An optical pickup including a light source, two light focus devices, a light reception device, a polarization selective light path splitting device, a polarization switching device, a first diffraction element including a periodic structure including two kinds of sub-wavelength convexo-concave structures while the two kinds of sub-wavelength convexo-concave structures alternately arranged at right angles to each other, and the filling factors of the two kinds of sub-wavelength convexo-concave structures are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to the polarization direction of the outgoing light beam, and the second diffraction element having a structure similar to that of the first diffraction element except that the filling factors are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to a polarization direction perpendicular to the polarization direction of the outgoing light beam.