Patent literature, self-interpretation and summary
A lot of diffractive optics patents have come about over the years, and we have yet to see a new product to join the 400 f/4 DO or 70-300 DO. Canon obviously sees value in the technology as they continue to research it.
Patent Publication No. 2012-2999
- 2012.1.5 Release Date
- Filing date 2010.6.16
Benefits of diffractive optical elements
- Can simultaneously reduce the chromatic aberration correction and lens length
- Perform light lens design
- Canon's patented
- Type Tele Photo
- The first lens group
- Aspherical surface having a diffraction
- Reduce the number of lighter
- Spherical aberration is corrected by using a non-
- The second lens group
- Inner Focus
Source: [EG]
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