Results 251 to 260 of about 6,537,748 (290)

Phase-shifting interference microscope with extendable field of measurement

Journal of Optics, 2018
Abstract An innovative phase-shifting interference microscope aimed at extending the field of measurement is proposed in this paper. The microscope comprises a light source module, a phase modulation module, and an interferometric module, which reconstructs the micro-structure contours of samples using the five-step phase-shifting ...
Shyh-Tsong Lin, Wei-Feng Hsu, Ming-Shiang Wang   +2 more
openaire   +1 more source

Differential-phase-shift quantum key distribution with an extended degree of freedom

Optics Letters, 2006
Differential-phase-shift quantum key distribution (DPS-QKD) with an extended degree of freedom of measurement is proposed. Extending the degree of freedom makes it possible to strengthen the DPS-QKD scheme against intercept-and-resend attacks. The feasibility of this idea is experimentally demonstrated.
Toshimori, Honjo, Kyo, Inoue
openaire   +2 more sources

Systematic design of phase-shifting masks with extended depth of focus and/or shifted focus plane

IEEE Transactions on Semiconductor Manufacturing, 1992
An optimization based algorithm for designing phase-shifting masks is proposed. The approach is an extension of the previous work in the sense that the intensity image is optimized at a number of optical planes rather than just the focus plane. In addition, the algorithm can be used to design masks with shifted focus plane and/or extended depth of ...
Yong Liu, Anton K. Pfau, Avideh Zakhor
openaire   +1 more source

Extending the Frequency Range of the Phase-Shift Oscillator

Proceedings of the IRE, 1945
Methods for facilitating the design of phase-shift oscillators at extreme frequencies of a fraction of a cycle to a few megacycles are discussed. It is shown that, if the input impedance of each section of a lumped resistance-capacitance network is made K times that of the previous section, the gain required for oscillation can be reduced to a ...
openaire   +1 more source

Fizeau simultaneous phase-shifting interferometry based on extended source

SPIE Proceedings, 2016
Coaxial Fizeau simultaneous phase-shifting interferometer plays an important role in many fields for its characteristics of long optical path, miniaturization, and elimination of reference surface high-frequency error. Based on the matching of coherence between extended source and interferometer, orthogonal polarization reference wave and measurement ...
Shanshan Wang, Qiudong Zhu, Yinlong Hou, Zheng Cao   +3 more
openaire   +1 more source

Minimum-Backflow-Power Scheme of DAB-Based Solid-State Transformer With Extended-Phase-Shift Control [PDF]

IEEE Transactions on Industry Applications, 2018
As key component for the flexible dc distributed power system, the dual active bridge (DAB)-converter-based solid-state transformer (SST) with high efficiency for a wide operating range is essential.
Lin Jiang, Guipeng Chen, Haochen Shi
exaly   +2 more sources

Extended averaging technique for derivation of error-compensating algorithms in phase-shifting interferometry

Applied Optics, 1995
Phase-shifting interferometry suffers from two main sources of error: phase-shift miscalibration and detector nonlinearity. Algorithms that calculate the phase of a measured wave front require a high degree of tolerance for these error sources. An extended method for deriving such error-compensating algorithms patterned on the sequential application of
J, Schmit, K, Creath
openaire   +2 more sources

Adaptive extended binary phase-shift keying waveform design algorithm for extended target detection

Journal of Applied Remote Sensing, 2019
We discuss the problem of extended binary phase-shift keying (EBPSK)–modulated radar waveform design in the presence of colored Gaussian disturbance subject to peak-to-average-power ratio and power constraints. The research work aims at improving the target detection and parameter estimation performance with respect to Doppler shifts.
Yu Yao, Junhui Zhao, Lenan Wu
openaire   +1 more source

Transferability of Phase Shifts in Extended X-Ray Absorption Fine Structure

Physical Review Letters, 1976
Phase shifts in extended x-ray-absorption fine-structure (EXAFS) measurements have been empirically determined for atom pairs. For photoelectron energies g 100 eV it is shown that these phase shifts, because they are essentially independent of chemical environment, can be used with EXAFS spectra to determine interatomic distances typically to ...
P. H. Citrin, P. Eisenberger, B. M. Kincaid   +2 more
openaire   +1 more source

Binary Decoding Extended to Nonbinary Demodulation of Phase Shift Keying

IEEE Transactions on Communications, 1969
The required energy per information bit E_{B}/N_{o} to achieve a specified error probability with a binary error correcting code is reduced by retaining partial knowledge of digit amplitudes. Quantization to three or four levels is the minimum step of demodulator complexity beyond hard decisions. A simple extension of binary decoding is described which
openaire   +1 more source