A zoom camera comprising an optical path folding element (OPFE) for folding the light from a first optical path to a second optical path, a first lens having a first optical axis and a first effective focal length EFL.sub.L1, the first optical axis being along the second optical path, a collimating lens having a second optical axis, and an image sensor located on the second optical path, wherein the collimating lens is movable between at least a first state and a second state, wherein in the first state the collimating lens is positioned in the second optical path between the OPFE and the first lens such that light entering the first lens arrives only from the image side of the collimating lens, and wherein in the second state the collimating lens is positioned outside the first optical path such that light entering the first lens does not arrive from the image side of the collimating lens.

The present invention provides microscopes and optical devices able to provide improved spherical aberration correction through the combined use a first optical system which comprises a common moveable or deformable rear lens system which forms part of the microscope objective in conjunction with a semi-objective lens system, and a second optical system which comprises a telescopic focusing system. Deforming, moving or repositioning one or more lenses of the common moveable or deformable rear lens system in the first optical system is able to act primarily on the anterior Gauss particulars (or the front conjugate) of the objective, while the telescopic focusing system of the second optical system is able to act on both the anterior and posterior Gauss particulars (or the front and rear conjugates). Adjustment of both optical systems in combination with one another allows for the formation of an improved image with enhanced spherical aberration correction.

The present invention provides microscopes and optical devices able to provide improved spherical aberration correction through the combined use a first optical system which comprises a common moveable or deformable rear lens system which forms part of the microscope objective in conjunction with a semi-objective lens system, and a second optical system which comprises a telescopic focusing system. Deforming, moving or repositioning one or more lenses of the common moveable or deformable rear lens system in the first optical system is able to act primarily on the anterior Gauss particulars (or the front conjugate) of the objective, while the telescopic focusing system of the second optical system is able to act on both the anterior and posterior Gauss particulars (or the front and rear conjugates). Adjustment of both optical systems in combination with one another allows for the formation of an improved image with enhanced spherical aberration correction.

A zoom lens is provided which has at least one front optical group with fixed optical power, adapted to receive rays from an observed object, at least one rear optical group with fixed optical power, adapted to convey the rays towards an image plane of a sensor, a lens opening positioned between the front optical group and the rear optical group, a front adaptive lens positioned between the at least one front optical group and the lens opening, and a rear adaptive lens positioned behind the lens opening. The front and rear adaptive lenses are controllable to vary the respective optical power to adjust focal length, magnification, and working distance of the zoom lens.

A changing system for a microscope includes multiple afocal enlargement changing modules of different enlargement levels that are optionally introducible into an infinite beam path running along an optical axis of the microscope. Each of the enlargement changing modules contain a light deflection system. The light deflection systems are designed to adjust the path length of the infinite beam path passing through the respective enlargement changing module in such a way that all of the enlargement changing modules, regardless of the different enlargement levels of the enlargement changing modules, map an exit pupil of a lens of the microscope onto the same location along the optical axis.

A changing system for a microscope includes multiple afocal enlargement changing modules of different enlargement levels that are optionally introducible into an infinite beam path running along an optical axis of the microscope. Each of the enlargement changing modules contain a light deflection system. The light deflection systems are designed to adjust the path length of the infinite beam path passing through the respective enlargement changing module in such a way that all of the enlargement changing modules, regardless of the different enlargement levels of the enlargement changing modules, map an exit pupil of a lens of the microscope onto the same location along the optical axis.

A changing system for a microscope includes multiple afocal enlargement changing modules of different enlargement levels that are optionally introducible into an infinite beam path running along an optical axis of the microscope. Each of the enlargement changing modules contain a light deflection system. The light deflection systems are designed to adjust the path length of the infinite beam path passing through the respective enlargement changing module in such a way that all of the enlargement changing modules, regardless of the different enlargement levels of the enlargement changing modules, map an exit pupil of a lens of the microscope onto the same location along the optical axis.

A changing system for a microscope includes multiple afocal enlargement changing modules of different enlargement levels that are optionally introducible into an infinite beam path running along an optical axis of the microscope. Each of the enlargement changing modules contain a light deflection system. The light deflection systems are designed to adjust the path length of the infinite beam path passing through the respective enlargement changing module in such a way that all of the enlargement changing modules, regardless of the different enlargement levels of the enlargement changing modules, map an exit pupil of a lens of the microscope onto the same location along the optical axis.

An embodiment of the present invention relates to an optical apparatus comprising: a first main body including first cover glass; a second main body including second cover glass and foldably connected to the first main body; a first optical module arranged in the first main body; and a second optical module which is arranged in the second main body and which overlaps with the first optical module in the optical axis direction when the first cover glass and the second cover glass are facing each other.

A zoom camera comprising an optical path folding element (OPFE) for folding the light from a first optical path to a second optical path, a first lens having a first optical axis and a first effective focal length EFL.sub.L1, the first optical axis being along the second optical path, a collimating lens having a second optical axis, and an image sensor located on the second optical path, wherein the collimating lens is movable between at least a first state and a second state, wherein in the first state the collimating lens is positioned in the second optical path between the OPFE and the first lens such that light entering the first lens arrives only from the image side of the collimating lens, and wherein in the second state the collimating lens is positioned outside the first optical path such that light entering the first lens does not arrive from the image side of the collimating lens.