Zoom optical system and imaging apparatus provided with the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 23, 2018
Issued Date -
N/A
app pub date -
Aug 18, 2016
filing date -
Sep 8, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A zoom optical system includes a negative first lens group having a first deflection optical element, a positive second lens group, a positive third lens group, a positive fourth lens group, and a second deflection optical element, in that order from the object side. The first lens group is provided at a fixed position relative to an imaging plane. Zooming is performed by moving at least the second and third lens groups so that distances between adjacent lens groups of the first through fourth lens groups change. The third lens group is a focusing lens group which moves along the optical axis during focusing. The following condition (1) is satisfied:
wherein f3 designates the focal length of the third lens group, and f4 designates the focal length of the fourth lens group.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2016 Application Filing Year
- G02B Class
- 10130 Applications Filed
- 7990 Patents Issued To-Date
- 78.88 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- G02B Class
- 28.28 % this patent is cited more than
- 7 Age
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