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De Vaan Adrianus Johannes Step: Image projection system.. Philips Electronics, June 14, 1995: EP0657769-A1 (23 worldwide citation)

A compact and efficient image projection system (1) is described. The projection beam (11) supplied by a projector (3) is incident on a beam splitter (7) in the form of a cholesteric filter. The cholesteric filter (7) reflects circularly polarized radiation having a wavelength which corresponds to t ...


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De Vaan Adrianus Johannes Step, Van Den Brandt Adrianus Henric: Image projection apparatus.. Philips, January 22, 1992: EP0467447-A1 (18 worldwide citation)

An image projection apparatus is described, which comprises an illumination system (100, 101, 54, 57, 62) having a first, round lens plate (54) and a second, half-round lens plate (57). A combination of a special polarization-sensitive beam splitter (20) and a polarization rotator (31) is arranged i ...


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De Vaan Adrianus Johannes Step: Image projection arrangement.. Philips, April 4, 1990: EP0361559-A2 (16 worldwide citation)

An image projection arrangement is disclosed, comprising a radiation source (1), an image display system having at least one image display panel (10) in which the polarisation direction of an incident beam is modulated with the image information, and a polarisation-sensitive beam splitter (2), arran ...


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Broer Dirk Jan, de Vaan Adrianus Johannes Step, Bambring Joerg: Polarisation-sensitive beam splitter.. Philips, May 22, 1991: EP0428213-A1 (13 worldwide citation)

In a polarisation-sensitive beam splitter 10 h,aving a polarisation-separating layer 13 interposed between two transparent elements 11, 12, the two transparent elements consist of non-birefringent material and the polarisation-separating layer is a birefringent adhesive layer. The polarisation-separ ...


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De Vaan Adrianus Johannes Step: A system and method for protecting electronic devices. Koninkl Philips Electronics, gong haijun tan youxiang, January 14, 2009: CN200680048569

An electronic safe includes apparatus ID codes of various electronic devices as well as security keys associated with the apparatus ID codes. In order for an electronic device to be operated, it must first make connection with the electronic safe in order to verify the security key. Once the securit ...


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Heusler Gero, Moench Holger, Van Den Brandt Ad, de Vaan Adrianus Johannes Step: Broadband laser lamp with reduced speckle. Koninkl Philips Electronics, lijing lan tanyou xiang, May 21, 2008: CN200680019123

The present invention is directed to a laser resonator emitting visible ra diation with reduced speckle noise, wherein said optical resonator is formed by at least two mirrors at both ends of a visible radiation emitting lasing material, wherein that optical resonator enhances multimode operation, s ...


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De Vaan Adrianus Johannes Step: System for scanning laser beam image projection with diverging beam and corresponding method. Koninkl Philips Electronics, liya fei tanyou xiang, July 2, 2008: CN200680023699

A projector (300) includes a laser (310) that generates a light beam, a modulator (320) that modulates the light beam with image data, a scanner (340) that scans the light beam to display an image, and a diverger (350) (e.g., a lens) that diverges the light beam to increase its beamwidth. The beamwi ...


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De Vaan Adrianus Johannes Step: System for scanning laser beam image projection with diverging beam and corresponding method. Koninkl Philips Electronics, April 2, 2008: EP1905246-A1

A projector (300) includes a laser (310) that generates a light beam, a modulator (320) that modulates the light beam with image data, a scanner (340) that scans the light beam to display an image, and a diverger (350) (e.g., a lens) that diverges the light beam to increase its beamwidth. The beamwi ...