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US 11,768,359 B2Granted
High etendue finite conjugate zoom lens assembly with five doublets two movable lens groups
AssigneeNavitar, Inc.
InventorChad Byler
Life of this patent
Estimating the term…
Abstract
A modular finite conjugate zoom lens assembly with five lens groups each including a doublet, wherein two or three movable lens groups are disposed between a pair of static lens groups.
Claims20
A modular finite conjugate lens assembly that comprises a zooming component including four lens groups and that is configured to exhibit:
- (a) between 0.45 and 4.65 mm2sr of etendue, and
- (b) a ratio of highest to lowest magnification between 5.5:1 and 16:1, and
- (c) a magnification of at least 2× at one or more points of a zoom range, and
- (d) wherein said zooming component comprises:
- (i) a first fixed lens group with a positive focal length comprising a doublet disposed at an object end of said zooming component;
- (ii) a second movable lens group with a negative focal length comprising a doublet disposed on an image side of said first fixed lens group;
- (iii) a third movable lens group with a positive focal length comprising a doublet disposed on an image side of said second lens group;
- and
- (iv) a fourth lens group with a negative focal length comprising a doublet disposed on an image side of said third lens group.
6 more elements
A modular finite conjugate zoom lens assembly, comprising:
- (a) five lens groups that are configured to exhibit:
- (i) between 0.45 and 4.65 mm2sr of etendue, and
- (ii) a ratio of highest to lowest magnification between 5.5:1 and 16:1, and
- (iii) a magnification of at least 2× at one or more points of a zoom range, and
- (b) wherein said zoom lens assembly comprises:
- (i) a static first lens group comprising a doublet disposed at an object end of said zoom lens assembly;
- (ii) a second lens group with a positive focal length comprising a doublet disposed on an image side of said static first lens group;
- (iii) a movable third lens group with a negative focal length comprising a doublet disposed on an image side of said second lens group;
- (iv) a movable fourth lens group with a positive focal length comprising a doublet disposed on an image side of said third lens group;
- and
- (v) a static fifth lens group comprising a doublet disposed on an image side of said movable fourth lens group.
8 more elements
Dependencies are inferred from the claim text.