Objective and family of objectives
AssigneeCarl-Zeiss-Stiftung
InventorsBertram Achtner, Jurgen Noffke, Dietmar Gangler, Elke Schmidt, Bo Moller
Life of this patent
Estimating the term…
Abstract
An objective has a front group, a focus group displaceable along the optical axis and a follow-on lens group having a diaphragm. The front group is arranged at the objective end. The lens group having the diaphragm includes at least two composite lenses and/or two positive lenses and/or the back focus can be adjusted. An objective series is presented wherein all objectives of the series have a uniform appearance and/or the diaphragm is arranged in all objectives proceeding from the image plane at the same location.
Claims31
An objective defining an optical axis and comprising:
- a front group;
- a focus group displaceable along said optical axis;
- and,
- a lens group incorporating a diaphragm;
- and,
- said lens group being mounted adjacent said focus group and including at least two composite lenses.
An objective defining an optical axis and comprising:
- a front group;
- a focus group displaceable along said optical axis;
- and,
- a lens group incorporating a diaphragm;
- and,
- said lens group being mounted adjacent said focus group and including individual lenses of positive refractive power mounted at the image side.
An objective defining an optical axis and comprising:
- a front group;
- a focus group displaceable along said optical axis;
- and,
- a lens group incorporating a diaphragm;
- and,
- said lens group being mounted adjacent said focus group and including at least two composite lenses and two individual positive lenses mounted at the image side.
A series of objectives comprising a plurality of objectives and each of said objectives defining an optical axis and including a front group;
- a focus group displaceable along said optical axis;
- and, a lens group including a diaphragm;
- and, the diaphragm in all of said objectives being mounted at the same distance from the image plane of the objective.
A television camera assembly comprising:
- an objective defining an optical axis and said objective including:
- a front group;
- a focus group displaceable along said optical axis;
- and, a lens group incorporating a diaphragm;
- and, said lens group being mounted adjacent said focus group and including at least two composite lenses;
- and,
- a television camera mounted on said optical axis next to said lens group.
A television camera assembly comprising:
- an objective defining an optical axis and said objective including:
- a front group;
- a focus group displaceable along said optical axis;
- and, a lens group incorporating a diaphragm;
- and, said lens group being mounted adjacent said focus group and including two individual lenses of positive refractive power mounted at the image side;
- and,
- a television camera mounted on said optical axis next to said lens group.
A television camera assembly comprising:
- an objective defining an optical axis and said objective including:
- a front group;
- a focus group displaceable along said optical axis;
- and, a lens group incorporating a diaphragm;
- and, said lens group being mounted adjacent said focus group and including at least two composite lenses and two individual positive lenses mounted at the image side;
- and,
- a television camera mounted on said optical axis next to said lens group.
A method of developing an objective series comprising the steps of:
- proceeding from the structure of a lens group;
- and,
- modifying only the additional lens groups for making available the wanted focal length.
Dependencies are inferred from the claim text.