OPTICAL IMAGING SYSTEM

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens sequentially disposed from an object side. The optical imaging system satisfies |Pnu| [10−6° C.−1 mm−1]≤30, where Pnu is ΣPnui in which i=1, 2, . . . , 7, Pnui i...

Full description

Saved in:
Bibliographic Details
Main Authors LEE, Eun Chong, CHAE, Kyu Min
Format Patent
LanguageEnglish
Published 06.10.2022
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
Online AccessGet full text

Cover

More Information
Summary:An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens sequentially disposed from an object side. The optical imaging system satisfies |Pnu| [10−6° C.−1 mm−1]≤30, where Pnu is ΣPnui in which i=1, 2, . . . , 7, Pnui is 1/(vti·fi), vti is [DTni/(ni−1)−CTEi]−1, fi is an effective focal length of an i-th lens, ni is a refractive index of the i-th lens, DTni is a rate (dni/dT) of change of the refractive index according to a temperature of the i-th lens, and CTEi is a thermal expansion coefficient of the i-th lens.
Bibliography:Application Number: US202117378945