Zobrazeno 41 - 50
of 257
pro vyhledávání: '"Osami Sasaki"'
Autor:
Yasuo Ohdaira, Kengo Murotani, Takamasa Suzuki, Futao Kaneko, Kazunari Shinbo, Kazumasa Banba, Keizo Kato, Osami Sasaki, Akira Baba
Publikováno v:
Molecular Crystals and Liquid Crystals. 504:114-123
A new Mach-Zehnder type optical-interferometer utilizing evanescent wave illuminations of a reflected beam at a prism surface was constructed to evaluate photoreactive molecular thin films on a prism surface. Refractive index changes of the films due
Publikováno v:
Optical Review. 14:314-318
A parallel plate interferometer with a reflecting mirror for measuring angular displacement is proposed. A deflection angle of a beam caused by an angular displacement is amplified by use of a reflecting mirror to increase the optical path difference
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 9:422-426
We demonstrate a full-range parallel Fourier-domain optical coherence tomography (FD-OCT) in which a tomogram free of mirror images as well as DC and autocorrelation terms is obtained in parallel. The phase and amplitude of two-dimensional spectral i
Publikováno v:
Optical Review. 14:23-28
In this work we describe a simple external-cavity laser diode equipped with a feedback control system, in which a high-resolution position-sensitive detector detects the slight misalignment of the light within the cavity. Our system not only provides
Publikováno v:
Applied optics. 54(10)
By nonrecursive matrix method using the Zernike circle polynomials as the basis functions, we derived a set of polynomials up to fourth order which is approximately orthonormal for optical systems with an annular pupil having a cross-shaped obstructi
Publikováno v:
Optics Communications. 267:341-346
Movements of a surface profile are measured with a two-grating interferometer using sinusoidal phase-modulation. Since sinusoidal phase-modulating (SPM) interferometry can record a phase change due to the movement of an object in the interference sig
Publikováno v:
Optics Communications. 260:398-402
A method for measuring diameters of metal cylinders is proposed. In this method a sinusoidally vibrating interference pattern (SVIP) of 100μm-period is used to generate an exact spatial scale along x-axis. Detection of the amplitude and the phase of
Publikováno v:
Optical Review. 12:319-323
We propose a sinusoidal wavelength-scanning interferometer for measuring thickness and surface profile of a thin film. The interference signal contains phase modulation amplitude Z and phase $aL which are related to the positions and profiles of the
Publikováno v:
Optical Engineering. 43(3):678-683
We propose a sinusoidal phase-modulating laser diode interferometer that uses a charge-coupled device (CCD)-based additive operation on four integrating buckets. By shifting the injection-current bias of a laser diode to introduce additional phase sh
Publikováno v:
Proceedings of SPIE - the International Society for Optical Engineering. 5265:127-133
We propose a two-wavelength interferometer that is used to a stroboscopic step height measurement. Different from most two-wavelength interferometers, in present experiment, two slightly different wavelengths are simultaneously oscillated by currentl