No title available

• US RE27,356 E
• Filed: 08/17/1970
• Issued: 05/09/1972
• Est. Priority Date: 08/17/1970
• Status: Expired

• Current Assignee: N/A
• Original Assignee: N/A
• Time in Patent Office: 631 Days
• US Class Current: 359/486.02
• CPC Class Codes: N/A

Abstract

1. IMAGE-FORMING APPARATUS COMPRISING A BEAM-SPLITTING CURVED MIRROR, A FIRST QUARTER-WAVE PLATE DISPOSED ON THE CONCAVE SIDE OF THE CURVED MIRROR, A SECOND BEAMSPLITTING MIRROR DISPOSED ON THE SIDE OF THE FIRST QUARTERWAVE PLATE REMOTE FROM THE CURVED MIRROR, A SECOND QUARTER-WAVE PLATE DISPOSED ON THE SIDE OF THE SECOND BEAM-SPLITTING MIRROR REMOTE FROM THE FIRST QUARTER-WAVE PLATE, AND A POLARIZER DISPOSED ON THE SIDE OF THE SECOND QUARTER-WAVE PLATE REMOTE FROM THE SECOND BEAM-SPLITTING MIRROR, THE FIRST AND SECOND QUARTER-WAVE PLATES HAVING THEIR FAST AXES ORIENTED WITH RESPECT TO EACH OTHER AT A SUBSTANTIALLY INTEGRAL MULTIPLE OF 90* AND THE POLARIZER HAVING ITS PLANE OF POLARIZATION ORIENTED SUBSTANTIALLY AT AN ODD INTEGRAL MULTIPLE OF 45* TO THE FAST AXIS OF THE SECOND QUARTER-WAVE PLATE.

Claims