Patent
Pulsed interferometric remote gauge
TLDR
In this article, a short-coherence-length laser pulse is projected upon two optical surfaces separated by a distance, d The reflected, coincident beams are directed into a Michelson interferometer in which one plane mirror is replaced by a stepped mirror and the beams reflected from the two mirrors are directed onto a film where they form interference images.Abstract:
The invention comprises a method and means for measuring the separation been two optical surfaces A short-coherence-length laser pulse is projected upon two optical surfaces separated by a distance, d The reflected, coincident beams are directed into a Michelson interferometer in which one plane mirror is replaced by a stepped mirror The beams reflected from the two mirrors are directed onto a film where they form interference images A formula using the number of channels, n, between successive interference fringes and the step width of the stepped mirror is used to calculate dread more
Citations
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Patent
Miniature fourier transform spectrophotometer
TL;DR: The Miniature Fourier Transform Spectrophotometer (MFTS) as discussed by the authors is a miniaturized Michelson interferometer with a scanning mirror that acquires the interferogram of the input light.
Patent
Interferometric device for recording the depth optical reflection and/or transmission characteristics of an object
TL;DR: In this article, a tomographic interferometer is used to create an object beam originating from an object, and the resulting light is sent to an array of side by side photodetectors.
Patent
Measurement system using optical coherence shifting interferometry
TL;DR: In this paper, a coherence shifting interferometry system determines the thickness or refractive index of an optically transmissive medium, where the source beam is divided into two beams by reflecting one portion of the beam off of a reflective surface.
Patent
Clip-on cover plate for electrical fixtures
TL;DR: In this article, a connection box system comprising an anchor configured to be removably secured to a fixture for delivery of a signal to a consuming device is described, and a face plate is attached to the electrical fixture or connection box using clips hidden behind the surface thereof.
Patent
Method and apparatus for contour mapping using synthetic aperture radar
TL;DR: In this article, two SAR antennas were used to illuminate the same target area, and pixel data from the two antennas were compared in phase to determine a difference Δφ from which a slant angle θ was determined for each pixel point from an equation Δ φ=(2πB/λ)sin(θ-α), where λ is the radar wavelength and α is the roll angle of the aircraft.
References
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Patent
Interferometric optical phase discrimination apparatus
TL;DR: In this paper, the authors proposed a method to determine the thickness of a travelling film by using a fixed reference pulse created during each cycle of the mirror when light from each beam individually constructively interferes.
Related Papers (5)
Michelson optical interferometer, thermal expansion meter using optical interferometer, and thermal expansion amount measuring method
Yukio Maeda,幸男 前田 +1 more