An image scanning and displaying system for eliminating color differences is revealed. The system includes an image scanner and a display screen with a second emission spectrum. The image scanner consists of an optoelectronic image capturing and forming system, a plurality of first light sources disposed around the optoelectronic image capturing and forming system and a control module. The first light sources have a first emission spectrum which is a white light composed of a plurality of wavebands with different peak wavelengths. The control module controls the optoelectronic image capturing and forming system to take monochrome images in different colors in time sequence. The second emission spectrum has the same characteristics as the first emission spectrum.

An image scanning, displaying and lighting system for eliminating color differences is revealed. The system includes an image scanner, a display screen with a second emission spectrum and a lighting device with a third emission spectrum. The image scanner consists of an optoelectronic image capturing and forming system, a plurality of first light sources disposed around the optoelectronic image capturing and forming system and a control module. The first light sources have a first emission spectrum which is a white light composed of a plurality of wavebands with different peak wavelengths. The control module controls the optoelectronic image capturing and forming system to take monochrome images in different colors in time sequence. The second emission spectrum has the same characteristics as the first emission spectrum while the third emission spectrum has the same characteristics as the second emission spectrum.

Disclosed is a novel vascular optical fiber guidewire. The vascular optical fiber guidewire includes a metal axial wire and an optical fiber surrounding the metal axial wire. The optical fiber includes a core wire and a cladding layer covering the core wire. For above vascular optical fiber guidewire, in a part of the optical guidewire that is required to transmit light, a bending radius of the optical fiber around the metal axial wire is greater than a critical bending radius, and in a region of the optical fiber guidewire that is required to scatter light, the bending radius of the optical fiber around the metal axial wire is less than the critical bending radius. The present disclosure is capable of entering a blood vessel by a percutaneous puncture technique, guiding the optical fiber guidewire through a medical imaging device in a blood vessel, and performing side-illumination on the head.

An oral photography system and method can include: a chassis, the chassis including a chassis base and a vertical chassis extension, the vertical chassis extension extending upward from the chassis base, and the vertical chassis extension including: a magnetic clamp having a first clamping element for securing an imaging device to the vertical chassis extension, the imaging device including a second clamping element, a diffusion panel attachment coupled to the vertical chassis extension, and a light panel attachment coupled to the vertical chassis extension; a diffusion panel releasably affixed to the diffusion panel attachment; and a light panel releasably affixed to the light panel attachment.

A cavity illumination system according to the present disclosure may include one or more illumination elements composed of a transparent or semi-transparent, biocompatible sterilizable polymer and one or more illumination sources. The sterilizable polymer operates as a waveguide. An illumination element may incorporate micro structured optical components such as for example gratings, prisms and or diffusers to operate as precision optics for customized delivery of the light energy. The micro structured optical components may also be used to polarize and/or filter the light energy entering or exiting the illumination element.

An endoscopic system including an endoscope including an optical element including a marker disposed thereon, an optical formation device that changes an angle of view, and an image capturing device receiving light from the optical element via the optical formation device and processing circuitry that identifies the angle of view from an image captured by the image capturing device based on the marker in the image.

Disclosed is a novel vascular optical fiber guidewire. The vascular optical fiber guidewire includes a metal axial wire and an optical fiber surrounding the metal axial wire. The optical fiber includes a core wire and a cladding layer covering the core wire. For above vascular optical fiber guidewire, in a part of the optical guidewire that is required to transmit light, a bending radius of the optical fiber around the metal axial wire is greater than a critical bending radius, and in a region of the optical fiber guidewire that is required to scatter light, the bending radius of the optical fiber around the metal axial wire is less than the critical bending radius. The present disclosure is capable of entering a blood vessel by a percutaneous puncture technique, guiding the optical fiber guidewire through a medical imaging device in a blood vessel, and performing side-illumination on the head.

An oblique-viewing endoscope is equipped with a hard portion which is provided at the tip of the oblique-viewing endoscope and is formed with an oblique end surface that is inclined with respect to the axial line of the oblique-viewing endoscope so as to form an acute included angle with it; an imaging window formed in the oblique end surface; a camera which is provided in the hard portion and performs imaging through the imaging window; an illumination window which is formed in the oblique end surface at a position in the rear of the imaging window; and an illumination device which is provided in the hard portion and performs illumination through the illumination window.

An optical path deflecting prism for endoscope which is used for observing an object in an oblique direction, includes a first prism and a second prism, and the first prism and the second prism are cemented. The first prism has a first polished surface and a second polished surface. The first reflecting surface is a mirror surface having a mirror coating applied to a polished surface of a flat plate, and is fixed by gluing to the fifth polished surface of the second prism upon adjusting an angle so as to correct an optical-axis shift which occurs due to a manufacturing error of the first prism and the second prism.

An endoscope includes: an illumination optical system that transmits illumination light generated by a light source therethrough to radiate the illumination light onto a subject, the illumination optical system being made of a transparent medium; an objective optical system that collects light from the subject irradiated with the illumination light; and a distal-end frame that accommodates the illumination optical system and the objective optical system, the distal-end frame being made of a scattering medium, wherein the illumination optical system radiates one part of the illumination light that has been transmitted therethrough indirectly onto the subject through the distal-end frame and radiates an other part of the illumination light directly onto the subject without passing through the distal-end frame.