IMAGE PICKUP LENS, IMAGING OPTICAL APPARATUS, AND DIGITAL DEVICE

• Main Authors: TANAKA HIROAKI, SANO EIGO, MATSUSAKA KEIJI, NISHIDA MAIKO
• Format: Patent
• Language: English; French; Japanese
• Published: 29.09.2011
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

Disclosed is an image pickup lens serving as a fixed-focal-length lens wherein a focusing movement of a second lens group is made in the optical axis direction in a state wherein a first lens group and a third lens groups are positionally fixed with respect to an image surface. The second lens group...