US Patent No: 6,008,951

Number of patents in Portfolio can not be more than 2000

Offset projection zoom lens with fixed rear group for reflective spatial light modulators

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ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

An offset reverse telephoto projection zoom lens 300 comprising a moving zoom group 302, a moving compensation group 304, and a fixed rear lens group 306. According to one embodiment of the projection lens, the zoom group 302 has four lenses, the compensation group 304 has four lenses, and the fixed rear group 306 has three lenses. An aperture stop 308 is located in the fixed rear group 306. The fixed rear group 306 has a small diameter which helps alleviate interference with illumination optics. Additionally, a fixed rear group 306 does not require zoom mechanisms at the rear of the lens 300 where space is at a premium.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TEXAS INSTRUMENTS INCORPORATEDDALLAS, TX17006

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Anderson, Douglas W Phoenix, AZ 61 848

Cited Art

Patent Info (Count) # Cites Year
 
TEXAS INSTRUMENTS INCORPORATED (1)
5,619,381 Offset zoom lens for reflective light modulators 14 1995

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
EASTMAN KODAK COMPANY (20)
6,808,269 Projection apparatus using spatial light modulator 17 2002
6,676,260 Projection apparatus using spatial light modulator with relay lens and dichroic combiner 31 2002
6,648,475 Method and apparatus for increasing color gamut of a display 44 2002
6,736,514 Imaging apparatus for increased color gamut using dual spatial light modulators 6 2002
6,809,873 Color illumination system for spatial light modulators using multiple double telecentric relays 5 2002
6,769,772 Six color display apparatus having increased color gamut 51 2002
6,802,613 Broad gamut color display apparatus using an electromechanical grating device 18 2002
6,758,565 Projection apparatus using telecentric optics 18 2003
6,807,010 Projection display apparatus having both incoherent and laser light sources 19 2003
7,221,759 Projector with enhanced security camcorder defeat 4 2003
6,839,181 Display apparatus 8 2003
6,902,277 Housing for a spatial light modulator 2 2004
6,877,859 Projection apparatus using telecentric optics 5 2004
6,863,402 Apparatus for displaying a color image from digital data 32 2004
6,857,748 Apparatus for displaying a color image from digital data 10 2004
8,132,919 Digital projector using arrayed light sources 0 2009
8,066,389 Beam alignment chamber providing divergence correction 0 2009
8,033,666 Beam alignment system using arrayed light sources 0 2009
8,220,931 Etendue reduced stereo projection using segmented disk 0 2009
8,066,382 Stereoscopic projector with rotating segmented disk 1 2009
 
SONY CORPORATION (10)
6,585,378 Digital cinema projector 60 2001
6,909,473 Display apparatus and method 23 2002
6,900,866 Modulation optical system with compensator 11 2003
7,061,561 System for creating a patterned polarization compensator 4 2004
6,954,245 Display apparatus with two polarization compensators 11 2004
6,897,926 Modulation optical system including a compensator conditioning oblique and skew rays 12 2004
7,023,512 Spatially patterned polarization compensator 10 2005
6,982,773 Exposure system for creating a patterned polarization compensator 2 2005
7,184,115 Display apparatus with two polarization compensators 2 2005
7,221,420 Display with a wire grid polarizing beamsplitter 13 2006
 
MOXTEK, INC. (8)
7,306,338 Image projection system with a polarizing beam splitter 3 2005
7,800,823 Polarization device to polarize and further control light 3 2006
7,630,133 Inorganic, dielectric, grid polarizer and non-zero order diffraction grating 10 2007
7,789,515 Projection device with a folded optical path and wire-grid polarizer 2 2007
7,961,393 Selectively absorptive wire-grid polarizer 1 2007
7,813,039 Multilayer wire-grid polarizer with off-set wire-grid and dielectric grid 4 2009
8,248,696 Nano fractal diffuser 0 2009
8,027,087 Multilayer wire-grid polarizer with off-set wire-grid and dielectric grid 3 2010
 
LG ELECTRONICS INC. (2)
7,252,390 Projecting optical system 0 2004
7,611,248 Projection lens unit and thin projector using the same 7 2005
 
FUJINON CORPORATION (1)
6,392,815 Small-sized, large-aperture, wide-angle zoom lens 3 2001
 
RAYTHEON CANADA LIMITED (1)
6,997,564 Digital projection display 0 2004
 
SEIKO EPSON CORPORATION (1)
7,567,380 Rear projection display device having multiple mirrors that are substantially parallel to a screen 5 2005
 
SONY ELECTRONICS INC. (1)
7,431,465 Apparatus and method to display images from projection device mounted in vertical position 3 2005
 
TEXAS INSTRUMENTS INCORPORATED (1)
7,857,463 Optical system for a thin, low-chin, projection television 3 2007