Patent · US Active

Compact telephoto lens having materials with anomalous relative partial dispersion

US11656432B2 · kind B2 · utility

0Cited by

24References

15Claims

0Family size

Assignee

Carl Zeiss AG · DE

Inventors

Friedrich Daniel Werdehausen · Herbrechtingen, DE
Hans-Juergen Dobschal · Kleinromstedt, DE
Markus Seesselberg · Aalen, DE

Key dates

Filing date	Feb 15, 2022
Grant date	May 23, 2023
Priority date	—
Expiry date	Feb 15, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04N23/55
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A lens for a camera has a longitudinal axis, a focal length, an installation length in the direction of the longitudinal axis of less than 10 mm, a plurality of refractive optical elements and a stop with a maximum diameter. The focal length of the lens can be in the range of 25 mm to 6 mm, and the ratio of focal length to maximum diameter of the stop can be in the range of 1.4 to 8. At least one refractive optical element can be formed of a material with an Abbe number for which the absolute value of the difference between relative partial dispersion of the material and a normal relative partial dispersion at the Abbe number of the material is at least 0.05.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.