Zobrazeno 91 - 100
of 257
pro vyhledávání: '"Osami Sasaki"'
Publikováno v:
Optical Engineering. 33(8):2670-2674
A sinusoidal phase-modulating Fizeau interlerometer using a BaTiO 3 self-pumped phase conjugator is constructed to measure surface profiles of objects with a high accuracy. An object field is formed on a surface of a glass plate where the object wave
Publikováno v:
Proceedings of SPIE - the International Society for Optical Engineering. 4829:853-855
Phase modulation amplitude Z_b caused by a sinusoidal wavelength-scanning and conventional phase α of an interference signal are kept at π and 3π/2, respectively, with feedback control systems for a displacement of an object larger than a half-wav
Publikováno v:
Optics in the Life Sciences.
The optical gradient force employed in optical tweezers is enhanced using a pulsed laser diode. A time-sharing approach can be applied for performing multiple optical manipulations to obtain gentle and stiff tweezers for delicate samples.
Publikováno v:
Proceedings of SPIE - the International Society for Optical Engineering. 2003:12-20
We propose a sinusoidal phase-modulating Fizeau interferometer using self-pumped conjugate wave for surface profile measurements. The interferometer is self-referencing and free from the effects of the axial movements of object surfaces. The characte
Publikováno v:
Optical Engineering. 32(5):1033-1037
A real-time displacement measurement system using a sinusoidal phase modulating interferometer is proposed and demonstrated. The system utilizes the frequency components of the interference signal to detect the desired phase or the displacement in re
Publikováno v:
SPIE Proceedings.
A profilometry based on Fizeau interferometer using the optical comb and the sinusoidal phase modulation technique is demonstrated. The optical comb generated with the Fabry-Perot etalon and a SLD is introduced in the Fizeau interferometer. The inter
Publikováno v:
SPIE Proceedings.
The multi-wavelength back-propagation (MWB) method enables to determine precisely the optical path different (OPD) longer than the optical wavelength from detecting the amplitude and phase of the interference signal for the multiple wavelengths. In t
Publikováno v:
SPIE Proceedings.
Two light beams reflected from a front and rear surfaces of a glass film of 20 micron thickness interfere with each other in a common path interferometer. Sinusoidal wavelength-scanning light with the scanning amplitude of 5 nm and frequency of 15 KH
Autor:
Osami Sasaki, Taku Yamagami
Publikováno v:
Applied optics. 26(7)
In singular vector space produced by singular value decomposition, the effect of noise on the expansion coefficients of an object is clear. A new image restoration method estimates the expansion coefficients corrupted by noise from the expansion coef
Autor:
Osami Sasaki, Toshiaki Watanabe
Publikováno v:
Applied optics. 20(23)