Matches 201 - 250 out of 272 < 1 2 3 4 5 6 >
Match Document Document Title
3617112 PHOTOGRAPHIC OBJECTIVE HAVING A REAR DIAPHRAGM  
A photographic objective having a rear diaphragm. In front of the rear diaphragm there are a pair of meniscus-shaped components respectively having convex surfaces directed toward each other with...
3586419 OPTICAL SYSTEM HAVING AN IMAGE DISTANCE INDEPENDENT OF THE REFRACTIVE INDEX OF THE MEDIUM OF OBJECT SPACE  
This invention relates to an optical system that has an image distance independent of the refractive index of the object medium, more particularly to an optical system wherein the first surface of...
3575494 VIRTUAL IMAGE CORRECTION LENS SYSTEM  
A visual system including a viewing window to present to a viewer a realistic virtual image representing a plurality of objects is disclosed. The images of the plurality of objects are often...
3476463 COHERENT LIGHT OPTICAL SYSTEM YIELDING AN OUTPUT BEAM OF DESIRED INTENSITY DISTRIBUTION AT A DESIRED EQUIPHASE SURFACE  
3362770 Dioptric component consisting of at least two concentrically curved members  
3217596 Infrared refracting lens system  
3195145 Spectacle lens system having protective major lens and detachable posterior corrective lens  
3158677 Wide angle oculars  
3135160 Optical system for transparency projection using point light source and compound negative lenses  
3094580 Afocal optical system focal length changer  
3068752 Wide angle lens systems  
3045545 Optical system for sighting instruments  
3027803 Spectacle lens-contact lens system  
3014407 Field lenses for telescopes  
2997920 Anamorphotic objective system  
2889745 Wide angle attachment for objective lenses  
2867152 Optical system comprising two lens elements with one element having two separated concentric surfaces  
2854891 Reversible magnifying attachment for lenses  
2821110 Anamorphotic attachments for optical objectives  
2730925 Two component eye lens system  
2730014 Optical system for distortionless underwater vision  
2610546 Condenser lens arrangement for projectors  
2586418 Two element photographic lens system  
2586231 Illuminated display device with animation  
2538291 Lens system  
2538077 Optical viewer  
2531956 Optical lens system  
2491758 Peephole for doors  
2490747 Infinity sight using a transparent reflector  
2474837 Wide aperture lens system having means for reducing spherical aberrations  
2420349 Schmidt's optical system comprising a correction element  
2410069 Objective for projection, photography, television, and for telescope  
2373815 Scanning lens  
2371165 Title is not available  
2332930 Optical element  
2312542 Optical instrument  
2274116 Optical system  
2262203 Optical protective device  
2172775 Optical system  
2140979 Condenser lens system  
2124301 Photographic objective  
2056990 Ultraviolet ray instrument  
1952394 Lens  
1813439 Lens of photographic cameras, picture projecting apparatus, and other like optical devices  
1716361 Lens  
1668030 Optical system of magnifying glasses  
1633373 Photographic camera  
1352028 Photographic objective  
1021337 Title is not available  
0940895 Title is not available  
Matches 201 - 250 out of 272 < 1 2 3 4 5 6 >