Summanry. Novel electro-optical alignment technique

1978 ◽  
Vol 125 (1) ◽  
pp. 71
Author(s):  
A.H. Falkner
Keyword(s):  
Alignment Technique ◽  
Optical Alignment

Innovative optical alignment technique for CMP wafers

2002 ◽  
Author(s):  
Ayako Sugaya ◽  
Yuho Kanaya ◽  
Shinichi Nakajima ◽  
Tadashi Nagayama ◽  
Naomasa Shiraishi
Keyword(s):  
Alignment Technique ◽  
Optical Alignment

Efficient Optical Alignment Technique for Compact 100 and 400 GbE TOSAs With Integrated Multiplexing With Free Space Optics

2019 ◽  
Vol 37 (3) ◽  
pp. 799-807 ◽  
Author(s):  
Tadashi Murao ◽  
Keita Mochizuki ◽  
Kazutaka Ikeda ◽  
Mizuki Shirao ◽  
Kiyotomo Hasegawa ◽  
...  
Keyword(s):  
Free Space ◽  
Free Space Optics ◽  
Space Optics ◽  
Alignment Technique ◽  
Optical Alignment

A Passive Optical Alignment Technique for Single-mode Fibers and Light-source Arrays

2017 ◽  
Author(s):  
K. Adachi ◽  
A. Nakanishi ◽  
T. Suzuki ◽  
H. Irie ◽  
Y. Sasaki ◽  
...  
Keyword(s):  
Light Source ◽  
Single Mode ◽  
Alignment Technique ◽  
Optical Alignment

scholarly journals In-Situ Evaluation of the Pitch of a Reflective-Type Scale Grating by Using a Mode-Locked Femtosecond Laser

2021 ◽  
Vol 11 (17) ◽  
pp. 8028
Author(s):  
Dong Wook Shin ◽  
Lue Quan ◽  
Yuki Shimizu ◽  
Hiraku Matsukuma ◽  
Yindi Cai ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Optical Components ◽  
Uncertainty In Measurement ◽  
Fabry Perot ◽  
Alignment Technique ◽  
Optical Alignment ◽  
Expression Of Uncertainty

Major modifications are made to the setup and signal processing of the method of in-situ measurement of the pitch of a diffraction grating based on the angles of diffraction of the diffracted optical frequency comb laser emanated from the grating. In the method, the improvement of the uncertainty of in-situ pitch measurement can be expected since every mode in the diffracted optical frequency comb laser can be utilized. Instead of employing a Fabry-Pérot etalon for the separation of the neighboring modes in the group of the diffracted laser beams, the weight-of-mass method is introduced in the method to detect the light wavelength in the Littrow configuration. An attempt is also made to reduce the influence of the non-uniform spectrum of the optical comb laser employed in the setup through normalization operation. In addition, an optical alignment technique with the employment of a retroreflector is introduced for the precise alignment of optical components in the setup. Furthermore, a mathematical model of the pitch measurement by the proposed method is established, and theoretical analysis on the uncertainty of pitch measurement is carried out based on the guide to the expression of uncertainty in measurement (GUM).

scholarly journals A high-resolution solar spectrum 2000 Å–2200 Å

1970 ◽  
Vol 36 ◽  
pp. 271-273
Author(s):  
B. B. Jones ◽  
B. C. Boland ◽  
R. Wilson ◽  
S. T. F. Engstrom
Keyword(s):  
High Resolution ◽  
Solar Spectrum ◽  
Solar Image ◽  
Roll Control ◽  
North East ◽  
The North ◽  
Alignment System ◽  
Optical Alignment ◽  
South Axis ◽  
System Operating

A high-resolution solar spectrum in the range 2000–2200 Å was obtained in a recent flight of a sunpointing Skylark rocket. This was launched at 04.21 hr UT on April 22, 1969 from Woomera and reached an apogee of 178 km. An optical alignment system operating on the main vehicle pointing system gave a net stabilisation of ±3 arc sec in the position of the solar image relative to the spectrograph slit. The slit, of length 1.0 mm, was set in the north-east quadrant parallel to and 5 arc min from the north/south axis, its lower edge being 1 arc min from the equator. The roll control of ±2.5° was provided entirely by the standard Elliott Bros. type of vehicle stabilisation.

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