| Solutions >> OPTICS AND MICROOPTICS |
Related product:
· PLu 2300
· PLu neox |
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Sensofar is offering perfect tools for the measurement of optical components. They allow three-dimensional measurements of moulds and finished optical surfaces to evaluate form and texture parameters. Using the highend technology developed by Sensofar, PLu 2300 is able to measure using the high repeatability of interferometry techniques to evaluate roughness, and the high numerical aperture and Super Long Working Distance conventional objectives in confocal mode, to evaluate three-dimensional data up to 71 degrees slope on smooth surfaces.
In addition, Micro optics become widely used in common life. The use of micro lenses increase the light efficiency of portable micro projectors such that we can buy for home cinema. The use of Fresnel lens to concentrate the light of a high power white light LED leads a very small and compact design with a high light efficiency and throughput and low consumption, being the ideal situation to replace the flashlights in a digital still camera. Other designs for biomedical applications improve the imaging properties of endoscopes and «lab on chip» devices used to compare tissue samples or chemical substrates. Alternatively, optical couplers like VCSEL for elecommunications and micro lenses to concentrate light in a microscopic waveguide open the field of Microsystems known as MOEMs. |
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SHAPE AND ROUGHNESS
For 2D non contact form measurement, PLu 2300 is able to acquire profiles up to 300 mm length using the extended profile option, by measuring single profiles and stitching as many as needed to cover the desired length. Maximum slope achieved by PLu 2300 is 71 degree. Nevertheless, because of the typical shape of a lens, it is not possible to avoid physical collision with the mechanics of the objective. Thus Sensofar offers the best solution in the market to measure up to 35 degree using a 100X Super Long Working Distance objective and lateral sampling up to 0.10 mm.
In addition, for 3D roughness evaluation, it is able to acquire single topographies from 91x68 mm2 up to 4.9x3.7 mm2 in few seconds. PSI technique will provide topographies with 0.1 nm repeatability. Roughness can be extracted from the measurement by the use of roughness filtering according to ISO and ASME standards. |
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Micro optical components have two important requirements for metrology: non-invasive and high accuracy. Contact profilers have the problem of being destructive but are able to profile a full lens regardless of the reflectivity and
the local slope. For moderate aspect ratio features or waveguides under a coating a white light vertical scanning interferometry is used. Example of a linear lens array. Replica of an array of cylindrical lens on an epoxy material
from a ion etching master. To measure it, a 50X, 0.8NA Objective with the topography stitching measurement has been used. Local slope of the surface reaches more than 30 degrees. |
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Optical diffuser made of random micro lens on a epoxy substrate. Non contact measurement made using a 20X objective and 10 x 10 single measurements. FOV: 7 x 5 mm. In addition to interferential technology, confocal technology can be operated without a vibration isolation table, and its high light efficiency and high numerical aperture objectives make it the ideal tool for testing and evaluating micro optical components, both in the design and production state. |
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PYRAMIDS
Three dimensional prisms are used in many optical devices. The optical profiling allows to characterize wall angle, angle between faces and prism height. |
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2D PRISMS
Two dimensional prisms are used for light distribution in flat panel displays. The typical angle is 45 degree, but modern prisms are reaching 60 degree.
2D prism measure of 45 degree prisms. Objective used: 100X 0.9NA. That prism was a plastic copy from a master. |
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3D PRISMS
The confocal stack image lets to visualize the “all in focus” image along with the 3D information. This makes the 3D rendering to be visualized as an electron microscope image. |
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PATTERN GENERATOR
Phase pattern generator on glass. At left-right: the FFT equals to the light pattern generated with a laser beam. |
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DIFFRACTIVE ARRAY
Diffractive elements configured in a square array for light gathering. |
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