18440035. ZOOM LENS AND IMAGE PICKUP APPARATUS simplified abstract (CANON KABUSHIKI KAISHA)
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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 18440035 titled 'ZOOM LENS AND IMAGE PICKUP APPARATUS
The abstract describes a zoom lens with multiple lens units arranged from the object side to the image side, including a fixed first lens unit with positive refractive power, movable lens units with negative refractive powers for zooming, and a fixed final lens unit with positive refractive power closest to the image plane. The distance between adjacent lens units changes during zooming, and part of the first lens unit moves for focusing. The first lens unit consists of one negative lens and at least five positive lenses arranged in order from the object side to the image side.
- First lens unit with positive refractive power fixed for zooming
- Movable lens units with negative refractive powers for zooming
- Final lens unit with positive refractive power fixed for zooming
- Changes in distance between lens units during zooming
- Part of the first lens unit moves for focusing
Potential Applications: - Camera lenses - Microscopes - Telescopes
Problems Solved: - Enhanced zoom capabilities - Improved focusing accuracy
Benefits: - High-quality images - Versatile zoom functionality
Commercial Applications: Title: Advanced Zoom Lens Technology for Imaging Devices This technology can be used in various imaging devices such as cameras, microscopes, and telescopes, enhancing their zoom capabilities and image quality. This innovation opens up new possibilities for professionals in photography, research, and astronomy.
Questions about Zoom Lens Technology: 1. How does the arrangement of lens units in this zoom lens contribute to its performance?
The arrangement of lens units in the zoom lens allows for precise zooming and focusing capabilities, resulting in high-quality images.
2. What are the advantages of having movable lens units with negative refractive powers in a zoom lens?
Movable lens units with negative refractive powers enable flexibility in adjusting the zoom level, providing versatility in capturing different types of images.
Original Abstract Submitted
A zoom lens includes, as a plurality of lens units arranged in order from an object side to an image side, a first lens unit having positive refractive power and fixed for zooming, at least two movable lens units having negative refractive powers and configured to move for zooming, and a final lens unit having positive refractive power, fixed for zooming, and disposed closest to an image plane. A distance between adjacent lens units changes during zooming. At least a part of the first lens unit moves for focusing. The first lens unit includes one negative lens and at least five positive lenses, which are successively arranged in this order from the object side to the image side. Predetermined inequalities are satisfied.
