Patent · US Active

Optical system and optical apparatus including optical system

US7292398B1 · kind B1 · utility

13Cited by

5References

8Claims

0Family size

Assignee

Canon Kabushiki Kaisha · JP

Inventor

Makoto Misaka · Yokohama, JP

Key dates

Filing date	Oct 25, 2006
Grant date	Nov 6, 2007
Priority date	—
Expiry date	Oct 25, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG02B27/0062
WIPO fieldOptics
WIPO sectorInstruments

Abstract

At least one exemplary embodiment is directed to an optical system which includes at least one first refractive optical element, which includes a solid material satisfying the following conditional expression (1), and at least one second refractive optical element, which includes a solid material satisfying the following conditional expression (2):−1.33×10−3×υd+6.7×10−1<θgF (1)−1.63×10−3×υd+6.2×10−1>θgF (2)

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