Increasing technological capabilities to produce active microelements (incl. microbeams, micromembranes and micromirrors) their expanding areas of application introduce unprecedented requirements concerning design testing. The paper presents a concept an optical measurement system methodology for out-of-plane displacement testing such microelements. is based on Twyman-Green microinterferometer. It gives the possibility combine time average quasi-stroboscopic interferometry methods find...

Mycoplasma synoviae (MS) is a major pathogen in chicken and turkeys, causing subclinical infection. MS infections are highly prevalent may potentate be involved sinovitis, respiratory syndromes, as well lead to eggshell apex abnormality (EAA). A deformed, inhomogeneous susceptible cracks breaks through which microbes get additionally entails higher water loss the egg during entire incubation process. Not all eggs with possess characteristic deformation that why some incorrectly classified...

Fresnel and Fourier holograms recorded by CCD/CMOS cameras can be numerically or optoelectronically reconstructed in order to provide visualization of 3D objects enable further manipulation their phases amplitudes. In the paper we propose introduce into digital holographic (DH) setup Liquid Crystal on Silicon (LCOS) spatial light modulator as an active 2D optoelectronic element which facilitates performing a variety operations at recording reconstruction stages. This includes introducing...

A use of the multichannel phase stepped interferometry approach to automated fringe pattern analysis in moire is described. Polarization optics used implement appropriate shifts each channel. The channels are created by inserting a diffraction grating at output interferometer. It possible work one frame rate. This system enables studies unstable environmental conditions and time dependent events.

An algorithm for interpolation of central fringe position in low-coherence interferometry measurements is presented. The based on a polynomial curve fitting. Fast calculation possible due to the use an NVIDIA Compute Unified Device Architecture (CUDA) technology, which allows independent analysis different points high-resolution detector matrix separate cores graphics processing unit (GPU). dependency method’s accuracy spectral width light source checked. computation times GPU are compared...

Analysis of microelements requires a local approach to their mechanical behavior and material constants distribution. This modern full-field measurement tools, among which automated grating (moire) interferometry (GMI) is one the best-suited methods. A new type microinterferometer presented. It based on concept an achromatic interferometer combined with glass block waveguide designed work standard optical microscopes. The various types plates are presented discussed. interferogram obtained...

Grating (moiré) interferometry is one of the well-known methods for full-field in-plane displacement and strain measurement. There are many design solutions grating interferometers, including systems with a microinterferometric waveguide head. This article proposes modification to conventional interferometer head, enabling implementation polarization fringe phase shift automatic pattern analysis. The presents both theoretical consideration proposed solution its experimental...

In this paper the methodology and instrumentation for investigation of silicon microbeam behavior under tensile bending loads are described. The tests performed by means Automated Grating Interferometry (AGI) Digital Holography (DH). Both methods deliver a direct approach to highly sensitive measurement surface displacements. combination with simulation tools (analytical or FEM models) material parameters can be determined. Consequently main aim measurements is determine three Cartesian...

Abstract This paper shows the result of work Institute Micromechanics and Photonics at Warsaw University Technology Length Angle Division Central Office Measures (GUM) [1] in building an automatic multiwavelength interferometric system with extended measurement range for calibration long (up to 1 m) gauge blocks. The design a full working setup environmental condition control monitoring systems, as well image analysis software, is presented. For length deviation determination phase fraction...

Described in this short paper is an implementation of the phase shifting technique for computer-aided processing interference fringes obtained by moire interferometry method in-plane displacement measurements or a similar arrangement used out-of-plane (flatness) determination. The polarized light approach was selected because common path propagation interfering beams. experimental verification presented.

An implementation ofthe phase-shifting technique for computer-aided processing of interference fringes obtained by the moiré interferometry method in-plane displacement measurements is described. Polarized light used both temporal and spatial (multichannel) approaches. The latter approach enables work at a single-frame rate. experimental results serve as comparison two

We present a methodology for static and dynamic testing of mechanical properties microelements.The measurement path includes temporal phase shifting interferometry quantitative shape elements analysis.This is followed by determination the resonance frequency means modified time average transient amplitude maps vibrating micromembrane capturing evaluation stroboscopic interferometry.Proper application combination these methods allows quick accurate analysis micromembranes optimization their...

This paper describes common efforts of Warsaw University Technology and Polish Central Office Measure to build a multiwavelength interferometer with extended measurement range calibrate long gauge blocks. To achieve this goal modified automatic fringe pattern analysis method based on fraction is proposed. The setup special chamber active temperature control stabilize environmental conditions has been build. assure correctness measure factors like temperature, pressure, humidity concentration...

The production of honey, and especially the unifloral varieties, is limited by factors such as weather conditions or availability nectar flow honeydew. This results in a deficit supply leading to adulteration honey. If they are not properly labeled, customers cannot distinguish artificial / synthetic products from real Currently, basic, commonly used method for determining varieties honey (botanical origin) palynological analysis. However, this procedure quite difficult owing dearth...

Grating Interferometry, known in the relevant literature as High Sensitivity Moiré is a method for in-plane displacement and strain measurement. The sensitivity of this depends on spatial frequency diffraction grating attached to object under test. For typical specimen grating, with high 1200 lines per mm, basic 0.417 µm fringe. A concept sensor based Interferometry stepwise change presented. It realized by using lower frequency. In case, has more higher orders selecting them appropriately,...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We present an interferometric setup for <emphasis emphasistype="italic">in situ</emphasis> monitoring of fiber tip positions when inserting optical fibers fixation in connector components. It ensures accurate position at the connector's front facet and across array cases where postinsertion polishing is not possible. demonstrate our technique by populating a plastic interconnect applications,...

The name “conoscope” in Greek suggests that this tool should be used for observing interference patterns of birefringent crystals the convergent beam light. As such, conoscope has been frequently laboratories quick and usually qualitative estimation optical inhomogeneity crystals. In paper we have described details computer-controlled imaging quantitative investigation uniaxial To best our knowledge, is first an automated arrangement. Its working based on equations derived a plane–parallel...

We have developed a multifunctional interferometric platform for testing MEMS/MOEMS, measuring the 3-D out-of-plane deflections and providing both material properties motion behaviour of microdevices. Specific metrology procedures been demonstrated to determine respectively residual stress silicon membranes compressively prestressed by SiO_xN_y PECVD deposition study vibration modes PZT microactuators as well expertise Scratch Drive Actuators.

Optical coherence tomography (OCT) is noncontact and nondestructive interferometric method which allows visualization of internal structure an investigated sample. Till now it has found many applications in measurements biological tissues, technical materials conservation art. full-field configuration a great technique for subsurface structures measured sample with high resolution. In this technique, <i>en-face </i>data acquisition applied, application microscope objectives numerical...

Determination of a phase correction is necessary when making interferometric measurements gauge blocks with an auxiliary platen. The compensates for the differences in reflecting properties block and platen surfaces. Different corrections are reported different manufacturers, made from materials surface roughness compared to In this paper, process selection best parameter influence complex refractive indices same type material analysed. new based on difference between weighted mean maximum...

Due to the significant difference in physical and chemical properties of ceramics metals, joining process these materials provides several problems. The paper describes a hybrid experimental-numerical approach for determination stresses C-M joint. Automated moire (grating) interferometry is used as full-field experimental method providing in-plane displacement/strain data, well local values Young modulus at vicinity These data can be input finite element analysis full stress state Analysis...

The paper deals with design and implementation of an optical extensometer based on grating (moire) interferometry, for large engineering construction monitoring. presents the principles interferometry miniaturized portable version interferometer its out-door measurement directly at civil structures. also a concept low-cost full-field extensometer.