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Class Information
Number: 359/559
Name: Optical: systems and elements > Diffraction > Using fourier transform spatial filtering
Description: Subject matter wherein an optical Fourier transform is taken of a diffracted beam of light and a spatial filter is placed at the Fourier transform plane to spatially limit the output optical wave to those having Fourier transform coefficients passed by the filter.

Sub-classes under this class:

Class Number Class Name Patents
359/562 For changing zeroth order intensity 57
359/560 For convolution (cross-correlation) 39
359/561 For correlation 199
359/563 With diffraction grating 109
359/564 With photographic media 28

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8570655 Optical mask for all-optical extended depth-of-field for imaging systems under incoherent illumination Oct. 29, 2013
8553329 Monolithic or hybrid integrated optical information processor employing a plurality of controllable optical transfer functions at fractional fourier planes Oct. 8, 2013
8441726 Optically variable filter apparatus and filter characteristic control method thereof May. 14, 2013
8416480 Hologram reproducing apparatus, hologram reproducing method, and phase modulating element Apr. 9, 2013
8398243 Projection device for the holographic reconstruction of scenes Mar. 19, 2013
8400710 Observing device Mar. 19, 2013
8368971 Light scanning apparatus and scanning display apparatus Feb. 5, 2013
8285401 Discrete fourier transform (DFT) analysis for applications using iterative transform methods Oct. 9, 2012
8274495 System and method for contactless touch screen Sep. 25, 2012
8244023 Shape measuring device and shape measuring method Aug. 14, 2012
8203788 Electromagnetic beam converter Jun. 19, 2012
8170366 Image processing using optically transformed light May. 1, 2012
8164832 Programmable optical computing device employing LED array transducers and stacked light modulator elements in fractional fourier planes Apr. 24, 2012
8125713 Light beam generation Feb. 28, 2012
8111968 Optical devices for guiding illumination Feb. 7, 2012
8101929 Diffraction free, self-bending airy wave arrangement Jan. 24, 2012
8102584 Enhanced optical readout scheme for a thermal imager employing a reconfigurable spatial light modulator Jan. 24, 2012
8040604 Imaging system and method for providing extended depth of focus, range extraction and super resolved imaging Oct. 18, 2011
8002413 Light source unit and projector Aug. 23, 2011
7972004 System and method for uniform light generation Jul. 5, 2011
7965435 Method for controlling the phase of optical carriers in millimeter wave imaging systems using optical upconversion Jun. 21, 2011
7948550 Electro-optic imaging system with aberrated triplet lens compensated by digital image processing May. 24, 2011
7911698 Programmable optical processing device employing stacked controllable phase shifting elements in fractional fourier planes Mar. 22, 2011
7734079 Methods and apparatus for image reconstruction Jun. 8, 2010
7697191 Generation of a desired three-dimensional electromagnetic field Apr. 13, 2010
7646549 Imaging system and method for providing extended depth of focus, range extraction and super resolved imaging Jan. 12, 2010
7609447 Programmable optical processing device employing stacked light modulator elements in fractional Fourier planes Oct. 27, 2009
7593615 Optical devices for guiding illumination Sep. 22, 2009
7554732 Wavefront coded imaging systems Jun. 30, 2009
7554731 Wavefront coded imaging systems Jun. 30, 2009
7440158 Direct optical image projectors Oct. 21, 2008
7428099 Optical security system using fourier plane encoding Sep. 23, 2008
7423808 Rear projection screen with spatial varying diffusing angle Sep. 9, 2008
7397557 Serrated Fourier filters and inspection systems Jul. 8, 2008
7391570 Programmable optical processing device employing multiple controllable light modulator elements in fractional fourier transform planes Jun. 24, 2008
7365917 Optical method and system for extended depth of focus Apr. 29, 2008
7345754 Fourier filters and wafer inspection systems Mar. 18, 2008
7330657 Method to demultiplex wavelengths of light Feb. 12, 2008
7330659 Wavelength filter that operates on sets of wavelength channels Feb. 12, 2008
7237940 Light guide plate with subwavelength grating and backlight module using the same Jul. 3, 2007
7230603 Illumination device and display device using the same Jun. 12, 2007
7227687 Complex spatial light modulator Jun. 5, 2007
7221515 Optical diffraction element May. 22, 2007
7215302 Display device, position adjustment pattern display program, recording medium, polarized glasses, and method of adjusting position of filter of the display device May. 8, 2007
7106510 Wavefront coded imaging systems Sep. 12, 2006
7061693 Optical method and system for extended depth of focus Jun. 13, 2006
7057786 Electro-optic array interface Jun. 6, 2006
7050235 Diffractive optical spectral filter having arbitrary amplitude and phase response May. 23, 2006
7012749 Optical processing Mar. 14, 2006
7006215 Shaped illumination geometry and intensity using a diffractive optical element Feb. 28, 2006

1 2 3 4 5 6

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