ZOOM LENS FOR PROJECTION AND PROJECTION IMAGE DISPLAY DEVICE

• Main Author: TOBIUCHI KUNIYUKI
• Format: Patent
• Language: English
• Published: 08.03.2012
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a compact zoom lens for projection having a large zoom ratio of 1.4 or more, a large angle of view with a half angle of view of 30° or more at the wide-angle end, and a bright F-number of about 1.7, and providing satisfactory images.SOLUTION: A zoom lens for projecti...