ZOOM LENS BARREL
作者： Yoshino Masaki
DOI:
关键词: Groove (engineering) 、 Barrel (horology) 、 Lens (optics) 、 Pressure angle 、 Optics 、 Focal length 、 Dowel 、 Zoom 、 Zoom lens 、 Physics
摘要: PROBLEM TO BE SOLVED: To provide a high-magnification zoom lens barrel, capable of smoothly and accurately performing operation by small force at any focal distance making cam pressure angle large. SOLUTION: It this barrel driven directly the including fixed straight advance for moving specified group, 4 has dowel groove 4b frame, 4a 4d so as to advance, 3 3a frame 3b then 1st 5 5b 5a barrel. By non-linear, is adjustable.
lens.org 参考文章(2)
Ishikawa Masaaki, Okada Tadanori, LENS BARREL AND OPTICAL EQUIPMENT PROVIDED THEREWITH ,(1998)
Okajima Taketoshi, ROTARY TYPE ZOOM LENS ,(1999)