Abstract:
Spectrometer apparatus, for self-calibrating a color image scanner of the line scanner or area scanner type, comprises a member, having an optical slit, movable into position on an optical axis of the scanner between its polychromatic light source and its focusable lens in a plane occupied by a color image when it is scanned. A diffraction grating is similarly movable onto the optical axis, a given distance from an image sensor of the scanner. The light source illuminates the slit and the diffraction grating disperses transmitted polychromatic light according to its wavelength, forming duplicate spectra off-axis across respective halves of the image sensor, with longer wavelengths being diverted to respectively higher angles.
Abstract:
Density variation across a localized area of a photographic plate is detected by directing a beam through said area and thence onto a photoelectric detector through a narrow slot at the imaging plane. Relative motion is effected between the beam and the slot, hence detector output varies with density across the scanned zone. A fiducial mark carrier is in a separate beam (preferably emanating from the same source) which follows a path in bypass relation to the plate but which is combined with the image carrying beam at the slot. Light filters in the respective beams enable separate electronic processing of image beam signals and fiducial mark beam signals.
Abstract:
An image beam from a constant intensity light source is passed through a small area of an image on a photographic plate, thence through a variable width scanning slot and onto a photoelectric detector. Relative scanning motion between beam and slot is effected in directions transverse to slot length. A second beam from the same source is directed around the plate, through the slot and onto the detector. The beams fall on the detector alternately, in synchronism with scanning, so that the second beam produces calibration pulses. Detector output is so amplified as to maintain amplified calibration pulses at constant magnitude.
Abstract:
A spectrometer where spectral lines within a wide wavelength range with a high resolution can be focused at one fixed output slit by using a diffraction grating which consists of separate areas having different numbers of grooves per unit length, the grating being arranged to refract spectral lines in superimposition or in alignment with each other, the instrument being suitable for flame photometer determination of substances.
Abstract:
A signal obtained by an analytical instrument is converted into a light and shade spectrum by an electron exposure unit, the said light and shade spectrum then being formed into a hologram. Unknown samples are qualitatively and quantitatively analyzed by correlating the hologram formed by a given unknown sample with the hologram of a known sample. Further, if the output signal from an interference spectrometer is fed into the exposure unit, a light and shade spectrum in the form of a hologram is produced. By applying Fraunhofer diffraction, Fourier transformed spectrum in reverse corresponding to a wave number is derived from the said hologram.
Abstract:
A spectrograph especially suited for research analysis of low level sources in such areas as reentry spectroscopy, comprising a high efficiency transmission grating or prism combined with a simplified Maksutov optical layout, and featuring lightweight structural components and arrangements which minimize thermally induced misalignments and simple adjustment mechanisms for focus of the film surface and alignment of the optical elements.
Abstract:
An image processing apparatus comprises: an image forming unit configured to form an image on a recording medium using a plurality of color materials on the basis of first image data showing an image; and an estimating unit configured to estimate a characteristic of each one of the plurality of color materials in a target region on the formed image on the basis of second image data obtained by reading the formed image. The estimating unit selects an estimation processing unit to use from among a plurality of estimation processing units used for different estimation methods on the basis of a combination of the color materials in the target region.