Power focus device for a camera
作者： Keiji Osawa , Ryuichi Mori
DOI:
关键词: Focus (computing) 、 Underwater 、 Lever 、 Camera lens 、 Neutral position 、 Power (physics) 、 Displacement (vector) 、 Optics 、 Engineering 、 Interface (computing)
摘要: A power focus device for a camera provides user-friendly lever interface allowing efficient operation. lever, located outside cover, is movable in two opposing directions but biased to remain at neutral position between extremes of movement. Moving the from initiates driving lens either first or second direction according displacement position. speed focusing proportional an amount position, thus permitting variable high and low both rapid accurate close-up infinity focussing. Incorporating seal into permits use underwater applications.
lens.org 参考文章(10)
Sumio Kawai, Yukio Nakajima, Tetsuo Miyasaka, Output device for range information for use in an interchangeable lens ,(1986)
Jr. Harold A. Gell, Underwater housing and pressure compensation method and apparatus ,(1990)
Yoshiaki Kobayashi, Hiroshi Kitamura, Lens driving apparatus for a camera ,(1989)
Tetsuo Miyasaka, Photographing data setting apparatus for camera ,(1989)
Youji Watanabe, Junichi Itoh, Lens drive apparatus for camera ,(1989)
Hiromi Someya, Information setting device for camera ,(1986)
Kenzo Ishibashi, Focus adjusting device for camera ,(1984)
Shoji Kawamura, Shunji Matsutani, Hisaaki Ishimaru, Power focusing device ,(1987)
Kazuhiko Arakawa, Ryuichi Kobayashi, Power focus device in a camera ,(1989)
Toshiaki Ishimaru, Shoji Kawamura, Shunji Matsutani, Lens driving apparatus ,(1988)