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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 7330659 |
Wavelength filter that operates on sets of wavelength channels |
Feb. 12, 2008 |
| 7330657 |
Method to demultiplex wavelengths of light |
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 |
| 6975786 |
Optical switching with ferroelectric liquid crystal SLMs |
Dec. 13, 2005 |
| 6972905 |
Non-positive-definite optical filtering from positive-definite transfer functions |
Dec. 6, 2005 |
| 6961456 |
Method and apparatus for reading and decoding information |
Nov. 1, 2005 |
| 6911637 |
Wavefront phase sensors using optically or electrically controlled phase spatial light modulators |
Jun. 28, 2005 |
| 6907124 |
Optical encryption and decryption method and system |
Jun. 14, 2005 |
| 6894748 |
Bump structure of a scattering reflective board and method for manufacturing the bump structure |
May. 17, 2005 |
| 6844947 |
All-optical holographic code division multiple access switch |
Jan. 18, 2005 |
| 6842285 |
Method and apparatus for generating a phase-modulated wave front of electromagnetic radiation |
Jan. 11, 2005 |
| 6832003 |
Method and apparatus for reading and verifying holograms |
Dec. 14, 2004 |
| 6762882 |
System and method for use of dark field fourier diaphragm in multi-frequency imaging |
Jul. 13, 2004 |
| 6747781 |
Method, apparatus, and diffuser for reducing laser speckle |
Jun. 8, 2004 |
| 6744502 |
Shaped illumination geometry and intensity using a diffractive optical element |
Jun. 1, 2004 |
| 6678411 |
Apparatus and method for characterizing, encoding, storing, and searching images by shape |
Jan. 13, 2004 |
| 6671452 |
Luminaire device |
Dec. 30, 2003 |
| 6657786 |
Synthesis of supergratings by fourier methods |
Dec. 2, 2003 |
| 6650476 |
Image processing utilizing non-positive-definite transfer functions via fractional fourier transform |
Nov. 18, 2003 |
| 6636293 |
Exposure method and apparatus having a decreased light intensity distribution |
Oct. 21, 2003 |
| 6631017 |
Matched amplification and switch joint transform correlator |
Oct. 7, 2003 |
| 6602596 |
Light diffusion sheet |
Aug. 5, 2003 |
| 6577429 |
Laser projection display system |
Jun. 10, 2003 |
| 6570708 |
Image processing apparatus and method with locking feature |
May. 27, 2003 |
| 6555955 |
Front panel for display |
Apr. 29, 2003 |
| 6525879 |
Optical filtering apparatus and method |
Feb. 25, 2003 |
| 6466374 |
Iridescent film with multidirectional variable optical stripes |
Oct. 15, 2002 |
| 6424449 |
Optical information processing apparatus for image processing using a reflection type spatial light modulator |
Jul. 23, 2002 |
| 6421178 |
Device and method for transforming optical beams |
Jul. 16, 2002 |
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