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Wednesday, January 29, 2014

Canon Patent For Macro Ring Flash

Egami has discovered a Canon patent for apparently, some kind of ring flash for more uniform distribution of light. It may come in handy with a prime and zoom macro lens Canon has on their drawing boards.

Patent Publication No. 2014-13350

  • Publication date 2014.1.23
  • Filing date 2012.7.5

Existing ring strobe

  • Xenon tube
  • Process to bend the arc shaped glass tube cylindrical difficult

Canon patents

  • There are two areas in light of the strobe
  • Light flux from the first region is subject to direct
  • Toward the object light beam from the second zone enters the prism, and then reflected inside
  • Provided with a step stepped on the reflecting surface, by changing the pitch of the step, it is possible to adjust the distance between the emission point

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