An autofocusing method includes causing light having n wavelengths different from one another to sequentially pass through a spectral filter and acquiring n image frames corresponding to the n wavelengths, n being an integer greater than or equal to two, selecting a wavelength corresponding to the image frame having the largest statistical value from the n image frames, the statistical value being one of the average, median, and mode of class values of pixels contained in a first region out of entire measurement pixels in each of the image frames, and determining a focusing point in a second region wider than the first region out of the entire measurement pixels while causing the light having the selected wavelength to pass through the spectral filter.

A laser analysis device includes a laser analysis unit that a sample is irradiated with laser light, a cover that covers a periphery of the laser analysis unit, so as to prevent the laser light from being emitted to outside, and has a slit in at least a part of the cover, a fastener configured to open and close the slit, and an interlock mechanism including a key provided on the fastener and a detector that detects a state in which the fastener is fully closed, in which in a state where the detector has detected that the fastener is fully closed, laser light having a predetermined intensity or more is introduced into the laser analysis unit.

A method for calibrating sensitivity of a photometer includes measuring, by a double-beam spectrophotometer, an absorbance spectrum of a control solution, which has been diluted and includes a control substance. The method further includes linearly regressing the absorbance spectrum of the control solution over a predetermined range of wavelengths and determining whether a first slope of the linearly regressed absorbance spectrum of the control solution falls within a range of slopes of lines obtained from linearly regressing absorbance spectra of a plurality of reference solutions over the predetermined range of wavelengths. A concentration of chromophore in each reference solution is known and the absorbance spectra of the plurality of reference solutions have been obtained by the double-beam spectrophotometer.

An illuminator system for semiconductor chip testing has a rotary plate and a first light source and second light source mounted on the rotary plate. A controller is configured to rotate the rotary plate to provide a desired light output. A light output of the illuminator system is aligned to the desired first or second light source. A first semiconductor chip receives illumination from the desired source. The rotary plate is rotated until the desired light source is aligned to the light output. A quality or characteristic of light emitted by the first light source can be measured, and then the first light source can be adjusted, or an alert can be generated, if the quality or characteristic falls outside of a preconfigured range.

A spectral property acquisition apparatus includes: a first conveying device to convey an object in predetermined conveying direction; a color data acquisition device including a plurality of spectroscopic sensors in the conveying direction, the plurality of spectroscopic sensors receive light emitted and reflected by the object to acquire color data on the object; a second conveying device to convey the color data acquisition device in a direction orthogonal to the conveying direction; and circuitry to estimate a spectral property of the object based on the color data. The circuitry controls the first conveying device so as to generate predetermined tension for the object in a color data acquisition area in which the color data on the object is acquired.

A Fourier spectrophotometer includes: a light source; an interferometer configured to obtain first and second interferograms whose intensity distributions are inverted from each other from the light emitted from light source; a multiplexing optical system configured to multiplex the first and second interferograms to irradiate the sample with a resultant interferogram; a demultiplexing optical system configured to demultiplex the first and second interferograms contained in the light passing through the sample; a light receiver configured to output a first light reception signal obtained by receiving the demultiplexed first interferogram and a second light reception signal obtained by receiving the demultiplexed second interferogram; and a signal processing device configured to perform processing for obtaining a noise-removed spectrum of the wavelength component in the analysis wavelength band by using the first and second light reception signals.

A sensor degradation evaluation method according to an aspect of the present disclosure includes an evaluation step of evaluating degradation of at least one of a sensor for coarse measurement that receives interference fringes produced by a spectrometer for coarse measurement and a sensor for fine measurement that receives interference fringes produced by a spectrometer for fine measurement, and the evaluation step includes causing a plurality of kinds of laser light having wavelengths different from one another to be sequentially incident on the spectrometer for coarse measurement and the spectrometer for fine measurement and acquiring a coarse-measurement wavelength and a fine-measurement wavelength on a wavelength basis from a plurality of the received interference fringes, acquiring a degradation parameter on a wavelength basis from the coarse-measurement wavelength and the fine-measurement wavelength on a wavelength basis, and comparing the degradation parameter on a wavelength basis with a threshold.

A colorimetric system includes: a communication section that receives the color value of a color for which colorimetry has been performed by a colorimetric device that performs colorimetry; and a comparison processing section that performs comparison processing between the received color value and the color value of a reference color. The comparison processing section decides whether a line colorimetry error occurred on a line under colorimetry. When the comparison processing section decides that a line colorimetry error occurred, the communication section transmits information about the line colorimetry error to the colorimetric device.

The colorimetric system of this embodiment includes the reception section that accepts generation of a color group including a plurality of reference colors to be compared with a color measured by a colorimetric section and an input of a color group name and the display processor that performs a process of displaying the generated color group on the display section. Furthermore, the reception section accepts a selection of a color group of a colorimetry target and the display processor performs a process of displaying a name of the selected color group in the display section.

A system and methods are used to provide patients access to in-home healthcare, for example, using a device in conjunction with a mobile device. The system and methods described herein are used for tooth whitening applications, general dental or medical checkups, detecting disease, updating dental or medical records, and automatic ordering of prescription and non-prescription products.