The LIDT of Ta2O5/SiO2 narrow-band interference filters under different laser modes

2004 ◽  
Author(s):  
WeiDong Gao ◽  
Hongbo He ◽  
Yuanan Zhao ◽  
Jianda Shao ◽  
Zhengxiu Fan
Keyword(s):  
Narrow Band ◽  
Interference Filters ◽  
Laser Modes

Laser-induced damage of Ta 2 O 5 /SiO 2 narrow-band interference filters under different 1064 nm Nd:YAG laser modes

2005 ◽  
Vol 250 (1-4) ◽  
pp. 195-202 ◽  
Author(s):  
Weidong Gao ◽  
Meiqiong Zhan ◽  
Shuhai Fan ◽  
Janda Shao ◽  
Zheng-Xiu Fan
Keyword(s):  
Nd:Yag Laser ◽  
Narrow Band ◽  
Interference Filters ◽  
Laser Modes ◽  
Laser Induced Damage

scholarly journals Measurement of Rose Indices on a Kiso 4-Degree Objective Prism Plate

1995 ◽  
Vol 148 ◽  
pp. 344-346
Author(s):  
S.-G. Lee
Keyword(s):  
Narrow Band ◽  
Structure Study ◽  
Galactic Structure ◽  
Spectral Indices ◽  
Structure Program ◽  
Interference Filters ◽  
Objective Prism ◽  
Low Dispersion

AbstractIn order to check the utilisation of 4-degree objective prism spectra for the deep spectroscopic galactic structure study, Rose’s (1984) seven indices between 3500 Å and 4400 Å for 19 Hyades stars were measured on a Kiso Schmidt prism plate, L3496. By comparison with those of Rose (1984), it is found that his spectral indices, Hδ/FeI, Hγ/P(4325), and P(3912)/P(CN) measured on these low dispersion spectra, are still usable. This result gives good prospects for a deep spectroscopic galactic structure program with the 4-degree objective prism and narrow band interference filters.

scholarly journals Multicolor Contrast Effects by Monochromatic Astronomic Filters – Utilization in Light Microscopy and Photomicrography

2008 ◽  
Vol 16 (5) ◽  
pp. 20-27 ◽  
Author(s):  
Jörg Piper
Keyword(s):  
Image Quality ◽  
Narrow Band ◽  
Light Pollution ◽  
Contrast Effects ◽  
Characteristic Radiation ◽  
Improve Image Quality ◽  
Interference Filters ◽  
Positive Effects ◽  
Spectral Components ◽  
Color Filters

Several color filters have been developed for astronomic use in order to improve image quality in visual observations and astronomic photography. Various positive effects, which can be achieved in astronomic practice, have already been described by several authors, manufacturers and distributors [2, 4, 5, 9, 10, 12]. Monochromatic narrow-band filters are widely used by astronomers. These filters are constructed as interference filters; they select small ranges within the spectrum of the visible light corresponding with characteristic radiation emitted by celestial nebula or the sun and its protuberances. This way, scattered terrestrial radiation caused by “light pollution” and non visible infrared or ultraviolet spectral components are blocked. Fundamental improvements of image quality will result from these filters when refractors or reflector telescopes are fitted with them.

Revisiting the innermost kinematics of M31 galaxy with the OMM Fabry-Perot interferometer

2019 ◽  
Vol 14 (S353) ◽  
pp. 130-133
Author(s):  
Sié Zacharie Kam ◽  
Claude Carignan ◽  
Michel Marcelin ◽  
Philippe Amram ◽  
Jean Koulidiati
Keyword(s):  
Rotation Curve ◽  
Narrow Band ◽  
Optical Emission ◽  
Emission Lines ◽  
Interference Filters ◽  
Andromeda Galaxy ◽  
Fabry Perot ◽  
The Galaxy ◽  
Data Points ◽  
Made In

AbstractWe present observations on optical emission lines acquired with the scanning Fabry-Perot interferometer of the observatoire du Mont Mégantic, of the Andromeda galaxy (M31). A 765 order Fabry-Perot were used with a fast readout EM-CCD. From data obtained, kinematic maps and data points for the rotation curve of the innermost part of the galaxy are derived. Several dozen of regions have been scanned with the Fabry-Perot interferometer and narrow band interference filters. The central 10’x10’ were scanned with five different filters. Observations have been made in order to get better Hα data for kinematics purposes.

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