OPTICAL PROJECTION EQUIPMENT

Brand Owner (click to sort) Address Description
ARTOGRAPH STUDIO DESIGNS, INC. 6027 Bandini Boulevard Commerce CA 90040 OPTICAL PROJECTION EQUIPMENT, NAMELY, PORTABLE, TABLE-TOP, OVERHEAD AND LARGE-SCALE OPAQUE PROJECTORS AND ACCESSORIES THEREFOR, namely, LENSES, STANDS, [ TRANSPARENCY PROJECTORS, ILLUMINATORS AND FILMS, ROLL FILM AND SLIDE ADAPTORS, ] PROTECTIVE COVERS [ AND CURTAIN AND ENCLOSURE ASSEMBLIES ];AUTOGRAPH;
DESIGN MASTER STUDIO DESIGNS, INC. 6027 Bandini Boulevard Commerce CA 90040 optical projection equipment; namely, portable, table-top, and large-scale opaque projectors and lenses, stands, and illuminators;DESIGN MASTER;
PRODUCTS FOR THE CREATIVE MIND ARTOGRAPH, INC. 2838 Vicksburg Lane North Plymouth MN 55447 optical projection equipment, namely, portable, table-top, overhead and large-scale opaque projectors and accessories therefor, namely, lenses, stands, transparency projectors, illuminators and films, roll film and slide adaptors, protective covers and curtain and enclosure assemblies;
PRODUCTS FOR THE CREATIVE MIND STUDIO DESIGNS, INC. 6027 Bandini Boulevard Commerce CA 90040 Optical projection equipment, namely, portable, table-top, overhead and large-scale opaque projectors; electric light boxes and light boards, namely, electronic devices for tracing designs and patterns and for backlighting and illuminating beads and beading trays; photographic and picture projectors;
TRACER STUDIO DESIGNS, INC. 6027 Bandini Boulevard Commerce CA 90040 optical projection equipment, namely portable tabletop opaque projectors;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. A projection optical unit has two lens groups. A first projection optical unit disposed closest to an image display element, temporarily forms a first enlarged image (magnification: M1) at the image display element side, rather than at a second projection optical unit. The first enlarged image is subsequently projected in an enlarged form (magnification: M2, wherein M2>M1) onto a screen via the second projection optical unit. A field lens group having positive refractive power is disposed between the first projection optical unit and the second projection optical unit. Consequently, the relationship between F2, which is the F-value of the second projection optical unit, and F1, which is the F-value of the first projection optical unit, becomes F2=F1/M1, whereby it is possible to realize very-wide-angle imaging at a field angle exceeding 90 degrees.