A drive device includes a filter section that includes an optical filter, a transmission section that rotates around a rotation shaft, a first groove portion that is formed to the transmission section, a protruding portion that is formed to the filter section, in contact with the first groove portion, and that moves the filter section from a first position to a second position by moving along the first groove portion in coordination with rotation of the transmission section, and a second groove portion that is formed continuously with the first groove portion, and that is provided along a tangent line direction passing through the protruding portion that is on a circle having the rotation shaft of the transmission section at a center and a radius that is a distance between the rotation shaft and the protruding portion, when the optical filter section is moved to the second position.

There are provided a light source device, which is more compact and inexpensive than a known light source device, and an endoscope system having a compact and inexpensive light source device. In a light source device, a light source unit includes a first light source that emits blue light, a second light source that emits broadband green light including not only a green component but also a red component, and an optical filter that adjusts the amount of broadband green light for each wavelength. The optical filter has a characteristic in which the reflectance of the green component is smaller than the reflectance of the red component in the case of reflecting the broadband green light or a characteristic in which the transmittance of the green component is smaller than the transmittance of the red component in the case of transmitting the broadband green light.

The present disclosure provides systems and methods for medical imaging. The system may comprise an optical adapter. The optical adapter may comprise a housing that comprises (1) a first end configured to releasably couple to a scope and (2) a second end configured to releasably couple to a camera. The optical adapter may comprise an image sensor coupled to the housing. The optical adapter may comprise an optics assembly disposed in the housing. The optics assembly may be configured to (1) receive light signals that are reflected from a target site within a subject's body and transmitted through the scope, and (2) reflect a first portion of the light signals onto the image sensor while permitting a second portion of the light signals to pass through to the camera.

Adaptive imaging methods and systems for generating enhanced low light video of an object for medical visualization are disclosed and include acquiring, with an image acquisition assembly, a sequence of reference frames and/or a sequence of low light video frames depicting the object, assessing relative movement between the image acquisition assembly and the object based on at least a portion of the acquired sequence of reference video frames or the acquired sequence of low light video frames, adjusting a level of image processing of the low light video frames based at least in part on the relative movement between the image acquisition assembly and the object, and generating a characteristic low light video output from a quantity of the low light video frames, wherein the quantity of the low light video frames is based on the adjusted level of image processing of the low light video frames.

A fluorescence observation apparatus including a light source that radiates illumination light and excitation light; a return-light-image generating portion and a fluorescence-image generating portion that generate a return-light image and a fluorescence image, respectively; a fluorescence detecting portion that detects a fluorescence region in the fluorescence image; a return-light-image adjusting portion that adjusts gradation values of the return-light image; a superimposed-image generating portion that generates a superimposed image by using the return-light image, in which the gradation values have been adjusted, and the fluorescence image; and a coefficient setting portion that sets, in the case in which the fluorescence region is detected, a degree-of-reduction of the gradation values, so that the gradation values of the return-light image are decreased as compared with the case in which the fluorescence region is not detected.

The disclosure relates to an endoscopic light source that includes a first emitter. The first emitter may emit light of a first wavelength at a dichroic mirror which reflects the light of the first wavelength to a plurality of optical fibers. The endoscopic light source further comprises a second emitter. The second emitter may emit light of a second wavelength at a second dichroic mirror which reflects the light of the second wavelength to the plurality of optical fibers. In one embodiment, the first dichroic mirror may be transparent to the light of the second wavelength, allowing the light of the second wavelength to pass through the first dichroic mirror.

An endoscopic imaging system for use in a light deficient environment includes an imaging device having a tube, one or more image sensors, and a lens assembly including at least one optical elements that corresponds to the one or more image sensors. The endoscopic system includes a display for a user to visualize a scene and an image signal processing controller. The endoscopic system includes a light engine having an illumination source generating one or more pulses of electromagnetic radiation and a lumen transmitting one or more pulses of electromagnetic radiation to a distal tip of an endoscope.

For the purpose of allowing fat to be stably distinguished irrespective of individual differences, so as to prevent damage to nerves that surround a target organ, an image processing device includes: a fat-image-region extracting unit that extracts a fat-image region that indicates a region, in a living-tissue image, where fat exists; a fat-color-component detecting unit that detects a fat-color-component amount that determines the color of fat, from the fat-image region extracted by the fat-image-region extracting unit; and a correction unit that corrects the signal intensity of the fat-image region extracted by the fat-image-region extracting unit on the basis of the fat-color-component amount detected by the fat-color-component detecting unit.

Systems, methods, and devices for hyperspectral imaging with increased dynamic range are disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation, wherein the pixel array comprises a plurality of pixels each configurable as a short exposure pixel or a long exposure pixel. The system includes a controller comprising a processor in electrical communication with the image sensor and the emitter. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of electromagnetic radiation having a wavelength from about 513 nm to about 545 nm, electromagnetic radiation having a wavelength from about 565 nm to about 585 nm, or electromagnetic radiation having a wavelength from about 900 nm to about 1000 nm.

An optical observation unit (1) has an illumination apparatus (43) for illuminating an observation object (3). The illumination apparatus (43, 143) has a light source (45) emitting illumination light with a first color temperature, and a spectral filter (49) that can be inserted in the illumination beam path. The spectral filter (49) converts the illumination light with the first color temperature into illumination light with a second color temperature. The illumination apparatus further has an attenuator (51) that can be inserted in the illumination beam path in place of the spectral filter (49) and has a transmission characteristic that leads to an intensity reduction of the illumination light with the first color temperature that corresponds to the intensity reduction of the illumination light with the second color temperature by way of the spectral filter (49).