Abstract:
A light guide may include a light stop part that is formed at a first end of an optical fiber, the light stop part stopping a light that is incident at a second end of the optical fiber and is transmitted through the optical fiber, and a slit part that is formed in the light stop part, the slit part being configured to pass the light that is incident at the second end of the optical fiber and is transmitted through the optical fiber.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide achieving both enhancement of resolution of a spectroscope and efficient acquisition of light.SOLUTION: A light shielding member to shield light is provided on an end of an optical fiber, and on this member a slit for letting light entering from the other end and propagating through the optical fiber pass is formed.
Abstract:
The invention relates to a bimodal optical spectroscopy device for producing spectra of autofluorescence and diffuse reflectance signals coming from a biological sample such as the skin. The following are identified: an excitation unit made up of a plurality of monochrome light-emitting diodes and a wideband pulsed lamp; a flexible optical probe made up of an excitation optical fibre arranged, on the distal side, at the centre of the flexible optical probe in order, consecutively, to carry the excitation signals from each element of the excitation unit to the biological sample, and a plurality of receiving optical fibres arranged, on the distal side, in the form of concentric circles around the excitation optical fibre in order to carry signals coming from the sample; a detection unit including a plurality of spectrometers, each receiving signals from receiving optical fibres arranged on a single circle in the optical probe; a filter wheel for eliminating excitation signals; and a processing unit for controlling the excitation and detection units and for ensuring synchronisation between said units during measurements.
Abstract:
A spectroscopic unit and spectroscopic device according to the present invention are provided with a filter that is provided with a plurality of optical filter elements disposed in order from the entrance side to the exit side of light under measurement and has different transmission wavelengths corresponding to entrance positions along a first direction. A first optical filter element from among the plurality of optical filter elements is tilted with respect to a second optical filter element disposed adjacently to the first optical filter element as a result of the first optical filter element being rotated by a prescribed angle with a third direction that is perpendicular to both the first direction and s second direction from the entrance side to the exit side as the axis of rotation thereof or being rotated by a prescribed angle with the first direction as the axis of rotation thereof.
Abstract:
A probe head for a diagnostic instrument using Raman spectroscopy for tissue measurements, the probe head comprising; a transmission optical fiber, a plurality of collection optical fibers, and a lens to transmit light from the transmission optical fiber to a test site, wherein the ends of the collection optical fibers are beveled or angled. The beveled surfaces can face towards or away from the end of the transmission fiber. Optical elements are used to gather and filter light scattered from tissue, and analysed to identify abnormal tissue.