EP 3507639 A1 20190710 - WIDE-ANGLE OPTICAL SYSTEM WITH VARIABLE FOCUS
Title (en)
WIDE-ANGLE OPTICAL SYSTEM WITH VARIABLE FOCUS
Title (de)
OPTISCHES WEITWINKELSYSTEM MIT VARIABLEM FOKUS
Title (fr)
SYSTÈME OPTIQUE GRAND ANGLE À FOCALE VARIABLE
Publication
Application
Priority
- FR 1658104 A 20160901
- FR 2017052310 W 20170830
Abstract (en)
[origin: WO2018042129A1] A fisheye-type wide-angle optical system (1) with variable focus mounted on an electronic image formation system (2) comprising a non-planar electronic image sensor (3) with fixed radius of curvature. The optical system comprises a first group of lenses (A) with negative refractive power and a second group of lenses (B) with positive refractive power moving with respect to each other between a shorter focal distance configuration and a longer focal distance configuration. The optical system satisfies condition (I) where C is the radius of curvature of the image formed by the optical system and bfw is the distance between the end lens of the imaged space of the second group of lenses and the object image formed by the optical system in the shorter focal distance configuration.
IPC 8 full level
G02B 13/06 (2006.01); G02B 15/16 (2006.01)
CPC (source: EP US)
G02B 13/06 (2013.01 - EP); G02B 15/142 (2019.07 - EP); G02B 15/1425 (2019.07 - EP US)
Citation (search report)
See references of WO 2018042129A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3055428 A1 20180302; FR 3055428 B1 20180914; EP 3507639 A1 20190710; WO 2018042129 A1 20180308
DOCDB simple family (application)
FR 1658104 A 20160901; EP 17771488 A 20170830; FR 2017052310 W 20170830