Abstract:
PROBLEM TO BE SOLVED: To provide a laser scanning method for measuring in vivo amount of a specific substance, which can quantitatively and non-invasively measure the concentration and distribution of lutein in ocular fundus.SOLUTION: The laser scanning method for measuring an in vivo amount of a specific substance is characterized in measuring the density of the lutein from a signal intensity level of an anti-stokes ray by causing the wavelength of the anti-Stokes ray to be greater than a wavelength absorption band of a specific substance, shifting the wavelength of a probe light by the amount of shifting in Raman scattering of the specific substance from the wavelength of the anti-Stokes ray, and shifting the wavelength of a Stokes light by the amount of shifting in Raman scattering of the specific substance from the wavelength of the probe light.
Abstract:
In the scanning molecule counting method which detects light of a light-emitting particle in a sample solution using a confocal or multiphoton microscope, there is provided an optical analysis technique enabling the scanning in a sample solution with moving a light detection region in a broader area or along a longer route while making the possibility of detecting the same light-emitting particle as different particles as low as possible and remaining the size or shape of the light detection region unchanged as far as possible. In the inventive optical analysis technique, there are performed detecting light from the light detection region and generating time series light intensity data during moving the position of the light detection region along the second route whose position is moved along the first route in a sample solution, and thereby, the signal indicating light from each light-emitting particle existing in a predetermined route is individually detected using the time series light intensity data.
Abstract:
A detection device includes: a light source that emits, toward an object, light of a first wavelength band, and light of a second wavelength band that is less readily absorbed by water than the light of the first wavelength band; a polarization splitter that splits at least one of S-polarized light and P-polarized light from light that has been reflected or scattered at the object; a photoreceptor that receives light reflected or scattered at the object via the polarization splitter; and a control unit that determines a state of the object from information based on light received by the photoreceptor. The light emitted by the light source is random polarized light where the ratio of P-polarized light and S-polarized light is generally uniform.
Abstract:
The invention concerns a method for inspecting packaging seams which involves: - creating a light beam producing at least one light transition (t); - acquiring a raw image matrix (B(N)) encompassing the light transition; - memorising, from each obtained image (B(N)), a measurement of the diffusion of the light transition; - for each of the H successive scanning increments, creating, from the raw matrix image (B(N)), an image line of which each pixel receives, as a value, the measurement in the raw matrix image (B(N)) of the diffusion of at least the light transition; - next, recording at least N lines of images in order to obtain a matrix image; - and analysing the matrix image in order to determine the conformity of the seam on said portion when the transverse width remains, at any point, greater than a given minimum.
Abstract:
A method and apparatus for optical detection of residual soil on articles (such as medical instruments and equipment), after completion of a washing or a rinsing operation by a washer. A soil detection system provides an indication of soil on the articles by detecting luminescent radiation emanating from the soil in the presence of ambient light.
Abstract:
Even when the distance from an objective lens to a sample differs, the distribution of light from the sample can be detected accurately. A first lens 23 for converting light from the objective lens into parallel light is composed of a concave lens part 32 having a concave curved face 32c in a center portion of a flat face 32a, and a convex lens part 33 having a convex curved face 33c around a flat face 33b. Further, the first lens 23 includes first and second regions for diverging light through the flat face 33b and the concave curved face 32c and a third region for collecting light through the convex curved face 33c and the concave curved face 32c. When the sample is placed on a sample table while being sealed in a two-dimensional electrophoresis substrate, light totally reflected by a side surface of the objective lens is caused to enter the second region. In contrast, when the sample is directly placed on the sample table, the light is caused to enter the third region. As a result, in any of the cases, the rays of light d emitted from the first lens 23 are nearly parallel to one another, and are nearly parallel to the optical axis.