An image quality is improved although a medical stereomicroscope optical system and a medical observation apparatus are small and light. An objective optical system and a plurality of imaging optical systems are arranged in an order from an object side to an image side, and the imaging optical system has at least a single aspheric surface. Accordingly, a spherical aberration and a field curvature are improved, and the image quality is improved although the medical stereomicroscope optical system and a medical observation apparatus are small and light.

An imaging system includes: an image forming device that obtains image information of an object with the focal length to the object being changed by a variable focal length lens in an optical system, so as to form an all-focused image of the object; a sensor device that detects variations in the surface level of the object in a focus direction; and a position adjustment device that adjusts the position of the object in the focus direction in accordance with the surface level variations of the object detected by the sensor device. The position adjustment device adjusts the position of the object in the focus direction in such a manner that the surface level of the object becomes closer to the center of a variable focal length range of the variable focal length lens.

Microscopic analysis of a sample includes a system using dark-field illumination. A mid-IR optical source generates a mid-infrared beam, which is directed onto the sample to induce a temperature change by absorption of the mid-infrared beam. A visible light source generates a light illuminating the sample on a substrate and creating a scattered field and a reflected field along a collection path of the system. A pupil mask is positioned along the collection path to block the reflected field while allowing the scattered field to pass therethrough. A camera is positioned at an end of the collection path to collect the scattered field and generate a dark-field image of the sample.

Methods and systems for collecting high definition images of spent firearm cartridges under different illumination conditions described herein. Features indicative of firing pin impact with each spent firearm cartridge are extracted and compared to features extracted from different spent firearm cartridges. The likelihood that the cartridges were fired from the same firearm is determined based on the differences between the extracted features. A cartridge fixture locates a spent firearm cartridge inside an imaging chamber illuminated by different combinations of illumination devices located in different locations with respect to the spent firearm cartridge. Collected images are filtered by a trained image feature filter to extract features indicative of a firing pin strike. Features extracted from different spent firearm cartridges are compared to determine the likelihood that the spent firearm cartridges were fired from the same firearm based on one or more error metrics characterizing feature differences.

A surgical microscope system for use in a medical procedure. The surgical microscope system is controlled in a first mode of operation corresponding to a phase of the medical procedure and defining at least one setting for adjusting a set of adjustable optics. While in the first mode of operation, the surgical microscope system automatically determines, from a captured image, an indication that a second mode of operation is relevant. The mode of operation is switched to the second mode of operation.

The phase contrast microscope includes: an illumination optical system 10 that emits illumination light for phase difference measurement to an observation target placed in a container; an adjustment optical system 20 that is provided between the illumination optical system 10 and the observation target S, has at least one optical element 21, and adjusts refraction of the illumination light due to a liquid surface shape of a liquid C in the container 60; an imaging unit 40 that images the observation target to which the illumination light has been emitted; and an adjustment optical system control unit 51 that adjusts optical characteristics of the adjustment optical system 20 based on uniformity of a density of an image captured by the imaging unit 40 and a density contrast.

A varioscope optical unit has a positive member (9) with a positive refractive power and a negative member (11) with a negative refractive power arranged along an optical axis (OA) so that the negative member follows the positive member along an observation direction (B). At least one of the members is displaceable along the optical axis. Each member has a first termination lens surfaces (23, 27) counter to the observation direction (B) and second termination lens surface (25, 29) in the observation direction. The second termination lens surface of the positive member and the first termination lens surface of the negative member are concave when viewed in the observation direction (B) and have radii of curvature of at most 500 mm. The second termination lens surface of the negative member is convex when viewed in the observation direction (B) and has a radius of curvature of at most 70 mm.

The invention relates to a eucentric digital microscope (10) that encompasses a stationary stand body (12) and a pivot unit (14) mounted pivotably on the stand body (12), the pivot unit (14) being mounted rotatably around a rotation axis (26) extending in a Y direction. The pivot unit (14) encompasses at least an optical system having an optical axis (15) extending orthogonally to the rotation axis (26), and a focal plane (92), the pivot unit (14) being arranged nondisplaceably at least in an X direction and in a Z direction relative to the rotation axis (26).

A medical imaging system for illuminating tissue samples using three-dimensional structured illumination microscopy is port-based surgery is provided. The system comprises: an image sensor; a mirror device; zoom optics; a light modulator; a processor; and collimating optics configured to convey one or more images from the modulator to the mirror, the mirror configured to convey the images to the zoom optics, the zoom optics configured: to convey the image(s) from the mirror to a tissue sample; and convey one or more resulting images, formed by the image(s) illuminating the sample, back to the mirror, which conveys the resulting image(s) from the zoom optics to the image sensor, and, the processor configured to control the modulator to form the image(s), the image(s) including at least one pattern selected to interact with the sample to generate different depth information in each of resulting image(s).

The present invention provides a light-field microscope including: an illumination optical system that radiates excitation light onto a sample; and a detection optical system including an objective lens that collects fluorescence generated in the sample as a result of the sample being irradiated with the excitation light by the illumination optical system, an image-acquisition element that acquires an image of the fluorescence collected by the objective lens, and a microlens array disposed between the image-acquisition element and the objective lens. The illumination optical system radiates a beam of the excitation light having a predetermined width in the optical-axis direction of the objective lens so as to include the focal plane of the objective lens onto the sample in a direction substantially perpendicular to the optical axis.