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US 12,352,935 B2Granted
Rear adapter for a high etendue modular zoom lens
AssigneeNavitar, Inc.
InventorChad Byler
Life of this patent
Estimating the term…
Abstract
A rear adapter module for a finite conjugate optical assembly and camera is configured to couple with a core zoom module. A lens assembly of the rear adapter module includes three or more lens elements and has a positive focal length. The lens assembly exhibits a pupil size of between 16 and 25 mm and a pupil depth greater than 50 mm.
Claims20
A finite conjugate camera, comprising a lens assembly including five lens groups and an image sensor disposed at an image plane of said lens assembly, wherein said lens assembly comprises, from object end to image end:
- (a) a lens attachment module that comprises a lens attachment lens assembly including a first lens group that includes a doublet within a first fixed housing;
- (b) a zoom module that comprises a zoom lens assembly including:
- (i) a second lens group that includes a doublet and a singlet both within a second fixed housing and exhibits a positive focal length;
- (ii) a third lens group that includes a doublet and a second lens element both within a first movable housing and exhibits a negative focal length;
- (iii) a fourth lens group that includes a doublet within a second movable housing and exhibits a positive focal length;
- and
- (iv) a fifth lens group that includes a doublet and a second lens element both within a same housing and exhibits a negative focal length;
- and
- (c) a rear adapter module.
6 more elements
A finite conjugate camera, comprising:
- (a) an afocal zoom module comprising a zoom lens assembly, comprising at least two movable lens groups disposed between a pair of fixed lens groups, each of said at least two movable lens groups being movable in its entirety, at least one of said at least two movable lens groups has a negative focal length and includes a doublet and a second lens element, at least one of said at least two movable lens groups has a positive focal length and includes a doublet, each of said fixed lens groups includes (i) a triplet or (ii) a doublet and a singlet, said zoom lens assembly exhibiting a ratio of highest to lowest magnification between 5.5:1 and 16:1;
- (b) a lens attachment module coupled at an object end of said afocal zoom module, comprising a lens attachment lens assembly having a positive focal length and including a doublet;
- (c) a rear adapter module coupled at an image end of said afocal zoom module;
- and
- (d) an image sensor disposed at an image plane.
2 more elements
Dependencies are inferred from the claim text.