Abstract:
A method of calibrating an interferometer system and a multilayer thin film used for calibrating the interferometer system. The method including measuring the step height of a gold step with the interferometer system, the multilayer thin film comprising a gold layer that defines the gold step. The multilayer thin film having an optical flat, a first layer on the surface of the optical flat, a second layer on the first layer, a test layer on a part of the second layer, and a gold layer on the test layer and on a part of the second layer uncovered by the test layer. The test layer having a test layer step, and the gold layer having a gold step over the test layer step. Also, a reference standard and a method of making the reference standard for a thin film sample with one or more component thin film layers, the reference standard having a gold layer over the surface of the thin film sample.
Abstract:
Wavelength reference standard using multiple gasses and calibration methods using same. A wavelength reference using absorption lines of multiple gasses provides stable reference wavelengths over multiple regions of interest of the optical spectrum. The gasses may be in separate cells or combined in one cell. Improved calibration using the reference is achieved by performing calibration measurements at a plurality of known wavelengths and using an average calibration constant derived from the plurality of measurements. In a second embodiment, improved calibration is achieved by performing calibration measurements at a plurality of known wavelengths and calculating a higher order calibration model, such as a least-squares linear fit. Both approached may be extended by segmenting the wavelength range and using calculated calibration values for each segment.
Abstract:
A method of calibrating a pick and place machine having an on-head linescan sensor is disclosed. The calibration includes obtaining z-axis height information of one or more nozzle tips via focus metric methods, including a Fourier transform method and a normalized correlation method. Additionally, other physical characteristics such as linear detector tilt, horizontal scale factor, and vertical scale factor are measured and compensated for in the process of placing the component. Nozzle runout, another physical characteristic, is also measured by a sinusoidal curve fit method, and the resulting Z-height calibration data is used to later place the component.
Abstract:
Method and apparatus for forming thin films by the application of a film forming liquid to a substrate at rest or rotating a speed up to 500 rpm and then rotating the film forming liquid on the substrate at a speed and for a time sufficient to form the thin film. Such films can be used for analysis by spectrophotometric methods. Apparatus for forming such thin films is also disclosed.
Abstract:
A method and apparatus for determining the condition of a test subject based on color uses a color measuring instrument to detect change in a color factor indicative of a condition such as a disease, spoilage, ageing, etc. A medical condition such as bilirubinemia that affects skin color can be detected. One measures color factors such as Hunter b and L in the subjects' skin color. For predetermined ranges of one color factor, in particular L, changes in the other color factor, e.g. Hunter b, above predetermined levels are indicative of the medical condition. In many cases, a single measurement of the color factors can be utilized as a warning of the likelihood of the medical or contaminated condition, if the ordinary range of the color factor is known for healthy individuals with skin coloration like that of the test subject. Even if there has been no baseline measurement and the test subject's color is such that a single reading of one or two color factors will not warn of the possible presence of the medical condition or contamination, sequential readings can indicate the presence or absence of the condition based upon changes in the measured color factor, or lack of changes. The color measuring techniques apply to a wide range of biological test subjects (e.g. hair, teeth, tissue, excretions, foods, soil, animals, plants). Methods and apparatus for determining accurate hair color classifications and appropriate coloring agents to bring about a selected change of color include a table of hair color classifications, a color measuring instrument to arrive at Hunter L, a and b for use in identifying a particular classification from the table and a database that identifies appropriate coloring agents based on a selection of coloring actions from a menu and the classifications of hair color.
Abstract:
The present invention overcomes the disadvantages of the related art by providing a spatial reference system that includes at least one artifact assembly. The artifact assembly has a measuring bar assembly including an inner member with a proximate end and a distal end, an outer member with a proximate end and a distal end, and a compensating member with a proximate end and a distal end operatively disposed between said inner and said outer members. The distal end of the outer member is fixedly mounted to the distal end of the compensating member. The proximate end of the compensating member is fixedly mounted to the proximate end of the inner member. The inner and the outer members each have a predetermined length and a predetermined coefficient of thermal expansion and the compensating member has a predetermined length and a predetermined coefficient of thermal expansion, such that the thermal expansion of the inner and the outer members is substantially eliminated by the expansion of the compensating member.
Abstract:
A test slide for the calibration, characterization, standardization, use and study of photon and electron microscopes. The slide is created by forming patterns with specific types of geometries on suitable substrates and these slides provide a standard for comparison of image forming capability of any type of microscope imaging system including, without limitation, light, UV, and X-ray photon microscopical imaging systems operating in transmission or reflection modes, and other microscope techniques. Microscopists can employ one of these slides to compare images of the slide which have been produced by the microscope system under consideration with a known, accurate, image of the slide to better understand the fidelity and accuracy of the microscope system under consideration. The test patterns can also comprise reference images which can be images created by a graphic artist or the like or which can be actual images of samples, these images being either two dimensional or three dimensional.
Abstract:
The present invention is an apparatus and method for calibrating a downward viewing image acquisition system. The apparatus comprises a calibration panel with calibrative material of known reflectivity. The calibrative material coats the panel surface or is pulled across its surface or pulled across its frame so as to maintain a consistent reflectivity and/or emissivity. A housing is provided which protects the calibration panel from the deteriorative effects of natural elements. The housing alternately exposes the calibration panel to the downward viewing image acquisition system as a calibration exposure and covers the calibration panel after the calibration exposure.
Abstract:
A light measuring apparatus is provided with a photoelectric conversion element for converting a light energy to an electrical signal, a calculation circuit for calculating a measurement value based on the electrical signal, a memory for storing a correction value, a corrector for correcting the measurement value using the correction value, and a controller for allowing calculation of a recent correction value when the timer measures elapse of a predetermined time, and permitting the memory to renewably store the recent correction value.
Abstract:
Solid state devise for the calibration of microplate fluorescence and absorption readers and spectrometers is described. When present in a single moiety, the disclosed device can tell if the lamp photomultiplier tube and optical alignment of the microplate reader or spectrometer deviates from its true value. When present as graded calibration pieces, the disclosed device can be used to calibrate a fluorescence or absorption reader. Calibration pieces are shaped, polished and coated with color absorbing or fluorescent standard to fit in microplate holding trays or spectrometers which are commercially available. Solid state devices are stable and durable and very inert to manipulations and thus are more reliable and unfaltering than solutions for absorption and fluorescence microplate readers or spectrometers.