18347620. ZOOM LENS AND IMAGE PICKUP APPARATUS simplified abstract (CANON KABUSHIKI KAISHA)
Contents
ZOOM LENS AND IMAGE PICKUP APPARATUS
Organization Name
Inventor(s)
ZOOM LENS AND IMAGE PICKUP APPARATUS - A simplified explanation of the abstract
This abstract first appeared for US patent application 18347620 titled 'ZOOM LENS AND IMAGE PICKUP APPARATUS
Simplified Explanation
The patent application describes a zoom lens with specific configurations of lens units that move and do not move during zooming, as well as changes in distances between lens units.
- First lens unit with positive refractive power that does not move during zooming
- Intermediate group with at least two lens units that move during zooming
- Lens unit with positive refractive power that moves during zooming
- Final lens unit with positive refractive power that does not move during zooming
- Intermediate group includes at least one lens unit with negative refractive power and at least three lenses
- Lens unit V closest to the object includes at least one positive lens and at least one negative lens
- A predetermined condition is satisfied
---
- Potential Applications
- Camera lenses
- Microscope lenses
- Telescope lenses
- Problems Solved
- Maintaining image quality during zooming
- Ensuring proper alignment of lens units
- Allowing for compact zoom lens design
- Benefits
- Improved image quality
- Versatile zoom capabilities
- Compact and efficient design
Original Abstract Submitted
A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power that does not move during zooming, an intermediate group that has at least two lens units moving during zooming, a lens unit having positive refractive power that moves during zooming, and a final lens unit having positive refractive power that does not move during zooming. Each distance between adjacent lens units changes during zooming. The intermediate group includes at least one lens unit having negative refractive power and including at least three lenses. Of the at least one lens unit having negative refractive power, a lens unit V disposed closest to an object includes at least one positive lens and at least one negative lens, and a lens disposed closest to the object in the lens unit V is a negative lens. A predetermined condition is satisfied.
