Zoom lens device with zooming position detector
作者： Hiroyuki Iwasaki
DOI:
关键词: Zoom lens 、 Lens (optics) 、 Physics 、 Barrel (horology) 、 Shutter 、 Front and back ends 、 STRIPS 、 Zoom 、 Optics 、 Brush
摘要: A zoom lens device has a zooming position detector consisting of code plate and brush device. The is mounted to front face shutter unit that attached end an axial movement barrel. barrel located inside helical so as be immovable in the direction relative barrel, but rotated for zooming. inner peripheral portion near rotates unit, such electric contact strips while determined based on output signals from
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