A viewing apparatus for producing a stereoscopic image for an observer, the viewing apparatus comprising: first and second video projectors for projecting respective ones of first and second video images of an object, the first and second images being different images which are one or both of spatially and angularly shifted in relation to the object so as to convey parallax between the images; a mirror arrangement comprising a concave mirror which receives light from the first and second video projectors, the mirror arrangement being located in relation to the first and second video projectors such that focussed images of the object are produced at the mirror arrangement; and a viewing lens for relaying exit pupils corresponding to each of the focussed images as reflected by the mirror arrangement to a viewing plane so as to be viewable at the respective eyes of the observer as a stereoscopic image without use of adapted eyewear; wherein the video projectors comprise first and second video displays which are driven by first and second video signals to display respective ones of the first and second video images, and first and second optical arrangements for focussing light from the respective images as displayed by the first and second displays to the mirror arrangement.

A biological tissue inspection apparatus is disclosed. The biological tissue inspection apparatus comprises a stage and a probe. The probe comprises an optical imaging device, an optical interference detector, and a light guide. The probe acquires data regarding optical images and optical interference, through the optical imaging device and the optical interference detector. The stage or the probe moves such that a selected area of the inspection object is positioned in the FOV of the optical imaging device and of the optical interference detector. The light guide is configured such that illumination light from the optical imaging device and measurement light from the optical interference detector are coaxially emitted to the inspection object.

The invention relates to a correction objective (10), comprising a first lens group (12) of positive optical power, a second lens group (14) of positive optical power, a third lens group (16) of negative optical power, and a fourth lens group (18) of positive optical power, which are arranged in this order from the object side, the second lens group (14) being movable along the optical axis (O) in such a way that the sum of the distance (V1) between the second lens group (14) and the first lens group (12) and the distance (V2) between the second lens group (14) and the third lens group (16) is constant. The image scale of the second lens group (14) lies in a range of −0.9 to −1.1.

A variable focal length (VFL) imaging system comprises a camera system, a first high speed variable focal length (VFL) lens, a second high speed variable focal length (VFL) lens, a first relay lens comprising a first relay focal length, a second relay lens comprising a second relay focal length, and a lens controller. The first relay lens and the second relay lens are spaced relative to one another along an optical axis of the VFL imaging system by a distance which is equal to a sum of the first relay focal length and the second relay focal length. The first high speed VFL lens and the second high speed VFL lens are spaced relative to one another along the optical axis on opposite sides of an intermediate plane which is located at a distance equal to the first relay focal length from the first relay lens. The lens controller is configured to provide synchronized periodic modulation of the optical power of the first high speed VFL lens and the optical power of the second high speed VFL lens.

A digital microscope system comprises a plurality of camera systems for imaging a target region of an object, each camera system comprising a digital camera and an optical imaging system being aligned along an optical axis of said camera system, wherein the optical axes of the camera system are parallel to each other; a microscope stage, on which the object is to be arranged; a positioning device; and a controller configured to control the positioning device to move the plurality of camera systems and the microscope stage relative to each other orthogonally to the optical axes of the camera systems for selectively aligning any one of the camera systems with the target region of the object.

The invention relates to a microscope (10) that encompasses an objective system (30) and a zoom system (32). The microscope furthermore has a diaphragm (60) for limiting the aperture of the beam path. A control unit (64) is furthermore provided, that control unit (64) automatically ascertaining, as a function of the current manifestation of at least one parameter of the microscope (10), a respective setting of the diaphragm (60) predetermined for the current manifestation, and setting the diaphragm (60) accordingly.

A scanning microscope includes a scanner, an objective irradiates a sample with illumination light deflected by the scanner, and a beam splitter that is arranged between the objective and an exit pupil position, and that reflects one of the illumination light and observation light from the sample and transmits the other. The objective has the exit pupil position outside the objective.

The invention relates to a method for punctiform illumination of a sample (1) in a microscope, more particularly a MINFLUX microscope, using illumination light, with the sample (1) being sequentially illuminated at the illumination points (3) of a predefined or predefinable illumination point pattern (2). The method is distinguished in that a lateral extent of the illumination point pattern (2) is smaller than the longest wavelength of the illumination light and in that the illumination points (3) are always illuminated exclusively with a time offset and in that a distinct individual light source (4) of a plurality thereof is assigned to each illumination point (3) of the 10 illumination point pattern (2) and each illumination point (3) is illuminated by the focus of an illumination light bundle (5) of the individual light source (4) assigned thereto.

A microscope (10) is described, having an aperture limiter (12), arranged in the beam path (22), for generating at least one optical channel (16; 18; 20). The aperture limiter (12) is embodied to set the aperture of the at least one optical channel (16; 18; 20). The aperture limiter (12) is furthermore embodied in such a way that in a first operating mode a first optical channel, and in a second operating mode at least one second optical channel, is selectively generatable. The aperture limiter is also arranged in the pupil plane of the beam path.

A microscope (10) for detecting images of an object (14) located in an object plane (12) is described, comprising a microscope stand (18); a microscope objective (20); a light source (22) integrated into the microscope stand (18); and a beam splitter (24), integrated into the microscope objective (20), for coupling in a coaxial incident illumination.