Optical Measurements TRIZ Cases

Multiple photodetector elements use differential and gate signals to validate zero crossings and improve optical encoder reference detection.

Pairwise differencing at mixer outputs suppresses uncorrelated signal portions, preserves dynamic range, and enables real-time correlated signal processing.

Different grating pitches create separable interference patterns, enabling faster and more accurate lithography aberration and alignment measurement.

A modulated mixing unit lets one photodetector track optical power and phase in photonic waveguides with less wiring and light loss.

A lenslet array and focal-plane mask convert phase into intensity for more precise low-light sensing of tip, tilt, and focus aberrations.

Multiple optical channels separate beat frequencies so one interferometric NIR setup can capture brain oxygenation and blood flow faster.

Planar light irradiation and wavelength-splitting optics estimate film thickness distribution in seconds instead of slow point or line scans.

Moving the illumination spot radially lets an interferometer extract absolute cavity distance and autofocus using a fixed-wavelength laser.

Complementary unipolar masks and region-based Fourier iteration recover missing spectral amplitude and phase for sharper image and signal reconstruction.

Wavefront analysis maps optical defects in vehicle glazing, including regions near opaque elements, to protect image quality for onboard cameras.

Adaptive averaging in dual-comb spectroscopy boosts SNR for remote methane leak detection, reducing close-range surveys and operator exposure.

Planar illumination and wavelength-selective light separation enable fast, accurate in-plane film thickness mapping without point-by-point scanning.

A specular reticle grating with phase stepping improves projection aberration accuracy and cuts lithography measurement time.

Inverse-designed 3D metaoptics sort wavelength, polarization, and propagation direction onto sensor pixels for compact multi-property light sensing.

A spatial interferometer and pixel array detect coherent light snapshots in intense sunlight, extracting wavelength and direction without scanning.

Combining wavefront sensing with temporal pulse measurement reconstructs and propagates ultrafast laser fields to model broadband aberrations accurately.

Heterodyne common-path reflectometry separates environmental polarization effects to measure thin-film thickness and optical constants accurately.

By locating the lens from first-face shape data, this case measures transmission wavefronts without inversion, cutting lens inspection time.

Irregular apertures and diffuser imaging split wavefronts into sub-beams, extending tilt and error measurement range without losing sensitivity.

Chebyshev-based nonuniform lenslet spacing improves Shack-Hartmann phase accuracy without doubling lenslet count.

A dichroic mirror and dual line sensors derive wavelength from reflected/transmitted light ratios, improving height measurement despite object color.