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1. (WO2015126710) ZOOM LENS OPTICAL SYSTEM

Pub. No.:    WO/2015/126710    International Application No.:    PCT/US2015/015532
Publication Date: Fri Aug 28 01:59:59 CEST 2015 International Filing Date: Fri Feb 13 00:59:59 CET 2015
IPC: G02B 7/04
G02B 15/00
Applicants: KREITZER, Melvyn, H.
MOSKOVICH, Jacob
Inventors: KREITZER, Melvyn, H.
MOSKOVICH, Jacob
Title: ZOOM LENS OPTICAL SYSTEM
Abstract:
A zoom lens (8) includes an optical path (12) extending between object and image ends (14, 16), two or more zoom lens groups (23, 24, 25), an intermediate real image plane (28) in optical path (12), and all zoom lens groups (23, 24, 25) on an image side (30) or an object side (34) of intermediate real image plane (28). Zoom lens (8) may include at least one optical path fold (20) in optical path (12). Field optics (100) in the vicinity of and associated with intermediate real image plane (28) may be in optical path (12). Zoom lens (8) may include a fixed rear optical group (26) nearest to image end (16) in optical path (12) and a fixed aperture stop (88) in fixed rear optical group (26) wherein aperture stop (88) remains stationary during zooming. Zoom lens (8) may have a magnification with an absolute value greater than 0.4 between intermediate and final real image planes (28, 17) located at image end (16). Zoom lens (8) may be entirely within a housing (54) of a digital camera (52) or cellphone (6) during its operation.