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6172816 Optical component adjustment for mitigating tolerance sensitivities  
Projection lenses and projection lens systems are telecentric between an illumination subsystem and a set of imagers. The lenses and systems can exhibit color fringing correction, uniform imager...
6172813 Projection lens and system including a reflecting linear polarizer  
Projection lenses and projection lens systems are telecentric between an illumination subsystem and a set of imagers. The lenses and systems can exhibit color fringing correction, uniform imager...
6160671 Retro-focus lens  
A retro focus lens having three lens groups arranged, in order from the longer conjugate length side of the lens, as follows: a negative first lens group G1, a positive second lens group G2, and a...
6144499 Projection lens  
The present invention relates to a projection lens including: a power lens unit; one or more image-side lens units, provided on the image side with respect to the power lens, for correcting an...
6141154 Focusable, color corrected, high performance projection lens systems  
Focusable, color corrected, high performance projection lens systems are provided which include three lens units (U1, U2, U3), the first lens unit being composed of two subunits (US1, US2). The...
6137638 Projection zoom lens system and projector apparatus  
A projection zoom lens system of the present invention having telecentric incident side is suitable for a projector apparatus using LCD or DMD with prism. The projection zoom lens system of this...
6130786 Projection lens and image display device  
An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first...
6124978 Projection lens  
A projection lens is disclosed having a low F-number of 1.7, which uses only a small number of lens elements and wherein various aberrations are favorably corrected. By satisfying certain...
6097546 Projection optical unit and projection display  
A projection optical unit comprises a frame, a projection lens, a dichroic prism for synthesizing red image light, green image light and blue image light, and three liquid crystal display panels...
6088171 Projection optical system  
A projection optical system including a first lens group G1 having positive power; a second lens group G2 having negative power; and a third lens group G3 having positive power wherein the lens...
6084719 Projection lens  
A projection optical system includes, in order from a first conjugate point side of longer distance to a second conjugate point side of shorter distance, a first lens unit in which negative lenses...
6081387 Projection lens  
A projection lens comprises 5 lenses in 5 groups including: a first-group lens that is a positive lens; a second-group lens that is a positive lens having the largest positive power (the inverse...
6081384 Color-corrected and temperature-compensated lens having an anomalous dispersion glass lens  
A lens system is constituted by a cemented lens made of anomalous dispersion glass for correcting the secondary spectrum of axial chromatic aberration, and a plastic lens having a...
6046859 Segmented lens  
A segmented aperture lens having multiple lens segments having predetermined patterns. Each lens segment may be a fresnel lens. The lens segments may be arranged in a two-dimensional array or a...
6025959 Color corrected projection lenses for use with curved faceplate cathode ray tubes  
A projection television system (10) is provided which has a CRT (16) with a curved faceplate and a projection lens system (13) for forming an image on a screen (14). The projection lens system...
6023375 Projection lenses for use with large pixelized panels  
A projection lens for use with LCD panels is provided. The lens has a first lens unit which has a positive power and a second lens unit which has a negative power. The first lens unit contains at...
6008950 Projection lens  
A first lens group U1 having a positive optical power, a second lens group U2 having a negative optical power and a third lens group U3 having a negative optical power are disposed in the order...
6008884 Projection lens system and apparatus  
A high-performance dioptric reduction projection lens and projection exposure apparatus and projection exposure method using same. The projection lens includes six lens groups and has a positive...
5986806 Decentered optical system  
A decentered optical system has a first lens unit having positive refractive power and a second lens unit having positive refractive power arranged in the order in which they are listed from a...
5986824 Large NA projection lens system with aplanatic lens element for excimer laser lithography  
Projection lens systems for transferring a pattern on a reticle onto a wafer having an aplanatic lens element. The aplanatic lens element has a shape factor between 0.1 and 0.224, the projection...
5982558 REMA objective for microlithographic projection exposure systems  
A REMA objective 123 images an object plane 1 onto the reticle plane 33 and has a lens group 300 disposed in the half of the objective close to the reticle. The object plane 1 lies at a finite...
5969874 Long focal length projection lenses  
A projection lens for use with LCD or DMD panels is provided. The lens has three lens units, the first unit having a weak power, at least one aspheric surface, a high dispersion negative lens...
5969876 Projection lenses having large back focal length to focal length ratios  
A projection lens for use with LCD or DMD panels is provided. The lens has three lens units, the first unit having a negative power and at least one plastic lens element having two aspheric...
5966250 Method and light collection system for producing uniform arc image size  
A structure and method for a collection system for a projector includes a collector for reflecting light and a correcting mechanism for receiving the reflected light. The collector and the...
5936776 Focusable front projection lens systems for use with large screen formats  
Variable focus, liquid coupled, front projection, lens systems (13) are provided for use with large screens (14), e.g., screens having a full diagonal of 1.5 meters and above. The lens systems...
5936780 Projection zoom lens having a long back focal length  
A projection zoom lens having a long back focal length is provided which can produce excellent image quality. The projection zoom lens comprises: a front lens group including a first lens that is...
5930049 Projection optical system and method of using such system for manufacturing devices  
A projection optical system is provided which forms an image of a first object onto a second object and includes, in order from the first object side:a first positive lens group G1 with a subgroup...
5920433 Large relative aperture telecentric lens  
A projection lens, which is as fast as 1.5 or thereabout in F-number and has an excellent telecentric property, includes, in order from a screen side, a first lens unit having a positive...
5907437 Converging optics for a single light valve full-color projector  
A light valve image projection system (10) wherein the optical registration of individual primary color images on a projection screen (14) is substantially immune to modification of the projection...
5905596 Telecentric projection lens system  
A telecentric projection lens system comprises, in order from the magnifying side to the reducing side, a positive power first lens group including, in order from the magnifying side, at least...
5900987 Zoom projection lenses for use with pixelized panels  
A zoom projection lens for use with LCD or DMD panels is provided. The lens has two units U1 and U2, which are moved relative to one another for zooming. The first unit has a negative power and...
5900989 Mini-zoom projection lenses for use with pixelized panels  
Projection lenses for use with pixelized panels, e.g., LCD panels, are provided. The lenses have a large focus range, e.g., a focus range of greater than 0.05 and in many cases greater than 0.1,...
5870228 Projection lenses having larger back focal length to focal length ratios  
A projection lens for use with LCD or DMD panels is provided. The lens has three lens units, the first unit having a negative power and at least one plastic lens element having two aspheric...
5856884 Projection lens systems  
Projection lens systems, which are used to transfer a pattern from a reticle onto a substrate, incorporate projection optical systems that are capable of maintaining the same, or increased...
5822129 Projection lens system  
A projection lens system has a wide angle with small value for back focus, superior telecentric characteristics, and small distortion. The projection lens system includes a first lens group having...
5808804 Projection television lens system  
Six-component projection lens systems for use in projection televisions are provided. From the screen side, the systems preferably have a + - +++ - configuration. The use of a second lens element...
5801886 Image magnification apparatus  
An image magnification apparatus, for use in a video display system that displays an image of an object, comprising a connecting module for connecting the image magnifying apparatus to a lens...
5798868 Projection lens  
An improved projection lens capable of advantageously decreasing a distortional aberration by providing a longer back focal length, which includes which includes a first lens group including a...
5790305 Projection system comprising a free form reflector and a free form lens  
The disclosure relates to an LCD projector illumination system that optimizes the illumination through a liquid crystal screen as well as through the aperture of the system's objective, wherein...
5781346 Magnification correction for small field scanning  
Magnification correction for small field scanning of large blanks is provided by adding magnification adjusting elements (lenses) to a double pass Wynne-Dyson lens or other type of one-to-one...
5774271 Lamp assembly  
A lamp assembly includes a condensing lens group disposed at one end for collecting and collimating a light from a light source, an exit lens group at the other end of the assembly, including at...
5760965 Wide-projection angle liquid crystal projection lens system  
A wide-projection angle liquid crystal projection lens system including a condensing lens, installed opposite to a light-emitting surface of an image-forming element for emitting image rays to be...
5731917 Projection tv set apparatus  
A lens device which is applied to a projection type image display apparatus includes an outer tube and an inner tube forming a tube structure having an optical lens and a thermal react material...
5699195 Projection lens arrangement and method of using same  
The projection lens arrangement includes a projection lens assembly having a plurality of lens elements aligned in a common optical path, and arranged in a generally Tessar configuration. One of...
5696631 Unit magnification projection lens system  
A unit magnification lens system suitable for imaging of features in photoresist designed for exposure at a wavelength of 248.4 nm using a krypton fluoride excimer laser. This lens system is...
5659424 Projecting lens and image display device  
An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first...
5644435 Zoom lens system and projection-type display apparatus  
A zoom lens system comprising, in order from a large conjugate side a first lens group having a negative refracting power and a second lens group having a positive refracting power. A focal length...
5642229 Projection lens unit  
A projection lens unit includes, in accordance with the order of disposition from a screen side, a first lens group including a positive meniscus lens, a second lens group including a double...
5633757 Projection lens  
An improved projection lens capable of substantially and advantageously implementing a distinct picture by compensating for a chromatic aberration and a residue aberration, which includes a first...
5600488 Projection lens assembly and projector  
A projection lens assembly having an imaging lens group, including a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a Fresnel lens...