Interferometers TRIZ Cases

A measurement system uses transmissive and reflective diffraction gratings to acquire in-plane distortion data.

A compact spatial phase shifting interferometer design reduces component count and size while maintaining a common optical path for signal and reference beams.

Self-calibrating redundant interferometers correct installation errors without auxiliary sensors, simplifying the calibration process.

A linear position sensor assembly uses a high permeability magnetic shield to enclose field sensors and minimize electromagnetic noise.

A Sagnac interferometer routes orthogonal polarization signals to a single detector for optical noise cancellation.

A wavelength-variable light source adjusts coherent length to separate interference fringes for precise shape computation.

Depolarizing means vary polarization state above scanning frequency to eliminate density stripes caused by fiber birefringence.

Diffraction grating filters multi-scattered signals to achieve tenfold depth increase in thick scattering media.

A normalization method adjusts retinal nerve fiber layer thickness measurements from off-centered time domain optical coherence tomography scans.

A galvanometer-based optical path adjustment unit switches light beams between anterior and posterior eye segment imaging modules.

Quadrature detection splits reference signals into phase-shifted components to generate evenly spaced triggers within each period.

A heterodyne fiber interferometer displacement measuring system uses a specially processed fiber ferrule and plano-convex lens to eliminate spot separation.

Merging branching and coherence portions into a single waveguide stabilizes measurement precision by eliminating manufacturing variances in branch ratios.

Galvanometer and wobble mirrors shift the beam along the path, resolving circular scanning inefficiencies that limit ambient detection.

Dynamic polarization switching enables simultaneous multi-depth imaging using one interferometer, eliminating the complexity and cost of multiple detectors.

An optical imaging apparatus uses frequency domain measurement to detect light scatter at multiple locations along a device under test.

A common path interferometer uses parallel optical branch paths and a three-way coupler to compute distance from detected light intensities.

Asymmetric detection aperture excludes reflected light to maintain focus accuracy on thin samples near reflective surfaces.

Entangled photon interference measures relative separations without prior knowledge, enabling femtosecond clock synchronization.

A single-chip optical coherence tomography engine integrates a digital Fourier-transform spectrometer with an optical phased array scanner.

A polarization control unit adjusts measuring beam orientation using reflected light to stabilize imaging systems.

Dual diffraction gratings cancel optical path length changes from surface tilt, enabling high-speed and stable height direction measurement.

Merging spatially separated beams via polarizing optics eliminates thermal drift and nonlinearity, ensuring high-precision displacement measurements.

Optical comb measures laser wavelengths to enable wide-range interferometric displacement measurement without expensive high-stability lasers.

Segmented pupil illumination resolves Height Process Dependency errors by combining multi-angle interference data to improve measurement reliability.

A wavelength-tunable light source determines output wavelengths via multiple drive parameters to enable continuous linear sweeping.

Extreme birefringence in the polarizing fiber maintains polarization stability despite movement, preventing signal degradation and image artifacts.

Segmenting illumination across spectral bands increases angular subtense and sensitivity while maintaining safe irradiance levels.

Multi-beam interference generates an inner light layer that reduces absorption and scattering, enhancing signal strength by over 600 dB.

A common path auto-correlation interferometer measures wafer feature depth using static mirrors and virtual interfaces.

A dual beam assembly divides a source beam into two measurement beams using reflective elements to enable simultaneous multi-point sensing.

Broadband interferometry system uses intensity monitors to track light fluctuations for precise position sensing.

A piezoelectric actuator and stepping motor stage adjust optical path length difference for surface form measurement.

A Fizeau interferometer uses an optical retarder to generate orthogonal polarization states for single-shot surface profiling.

Merging reference and object beams into a single path eliminates differential errors, achieving 1/1000 wavelength interpolation accuracy.

Polarization-sensitive semiconductor optical amplifiers maintain orthogonal polarization states to resolve tissue birefringence without mechanical modulators.

A digital holography system uses scattered coherent illumination to measure surface topography.

A heterodyne grating interferometer system measures large-stroke horizontal and vertical displacements using beat frequency signals from dual-frequency laser beams.

Segmenting measurement beams below 550 nm creates a synthetic wavelength that extends the distance range while absorbing coating reflections.

Spatial filtering blocks specular light at the Fourier plane to resolve edge registration errors in flatness measurement.

Parallel detection architecture eliminates mirror image and DC noise while achieving ultra-high speed imaging without mechanical scanning.

Triple-pass interferometer routing beams through flat plates compensates for tilting without complex prism assemblies.

A grating measurement device uses dual-frequency light beams to calculate vertical displacement with high precision.

Copied optical patterns on plane plates replace complex beam splitter cubes, reducing device complexity while maintaining measurement precision.

An optical image measurement device determines optimal signal light projection positions to acquire clear OCT images.

An optical coherence tomography scanner uses a back reflection mechanism to determine lateral beam deflection position.

A Fabry-Perot interferometer uses single-detector quadrature detection to determine displacement direction.

Active beam steering maintains signal continuity during off-center rotation, enabling sub-nm resolution without mechanical centering.

A single laser source generates opposing chirp signals via optical delay to enable interferometric distance measurement.

A polarization-separated interferometer uses orthogonally polarized beams and electro-optic phase modulation to generate stable interferograms without moving parts.