Determination of the characteristics of interference filters with a spectral interferometer

1971 ◽  
Vol 14 (2) ◽  
pp. 237-239
Author(s):  
E. A. Ptitsyna
Keyword(s):  
Interference Filters

scholarly journals Trinary mappings: a tool for the determination of potential spectral paths for optical monitoring of optical interference filters

2018 ◽  
Vol 57 (24) ◽  
pp. 7012 ◽  
Author(s):  
Mael Vignaux ◽  
Fabien Lemarchand ◽  
Thomas Begou ◽  
Catherine Grèzes-Besset ◽  
Julien Lumeau
Keyword(s):  
Optical Monitoring ◽  
Optical Interference ◽  
Interference Filters

A Simple, Stable Instrument for Determination of Bilirubin by Direct Spectrophotmetry

1961 ◽  
Vol 7 (5) ◽  
pp. 512-520 ◽  
Author(s):  
Sanford H Jackson
Keyword(s):  
Spectrophotometric Determination ◽  
Monochromatic Light ◽  
Interference Filters ◽  
Prototype Instrument

Abstract A description is given of a prototype instrument for the direct spectrophotometric determination of bilirubin in infant serum. The instrument uses a mercury-arc emission lamp and interference filters to isolate monochromatic light. Results given by this instrument are about 5 per cent higher than those by the Evelyn and Malloy chemical procedures but agree closely with those given by the Beckman DU spectrophotometer.

DETERMINATION OF CHARACTERISTICS OF INTERFERENCE FILTERS

1971 ◽  
Vol 177 (1 Defined Immun) ◽  
pp. 430-433 ◽  
Author(s):  
Jørgen Rygaard ◽  
Werner Olsen
Keyword(s):  
Interference Filters

Dual pure-rotational Raman channel design and implementation in a multiwavelength lidar system for the monitoring of aerosol optical properties.

2021 ◽  
Author(s):  
José-Alex Zenteno-Hernández
Keyword(s):  
Optical Properties ◽  
Cross Sections ◽  
State Of The Art ◽  
Aerosol Optical Properties ◽  
Lidar System ◽  
Separation Unit ◽  
Interference Filters ◽  
Multi Wavelength ◽  
Expected Signal

<p>Pure-rotational Raman (PRR) scattering has proven to be an efficient technique for the determination of atmospheric aerosol optical properties for lidar applications. We present the implementation of a UV-PRR and the design of a VIS-PRR in the EARLINET/UPC multi-wavelength lidar system (Barcelona, Spain). State-of-the-art computations of N<sub>2</sub> and O<sub>2</sub> differential backscatter cross-sections weighted by the optical losses inside the optical separation unit of the system allow for the theoretical estimation of the expected signal-to-noise ratios (SNR) in both UV and VIS channels. By means of customized optical interference filters UV-PRR signals from atmospheric N<sub>2</sub> and O<sub>2</sub> were detected and compared to the classical vibro-rotational Raman signals. UV-PRR detected signals have shown to possess high SNR and relative uncertainty levels lower than a tolerable 15% for daytime and nighttime measurements. The theoretical analysis of the VIS-PRR channel augurs improvements similar to those observed with the UV-PRR channel.</p>

Porosity profile determination of porous silicon interference filters by RBS

2005 ◽  
Vol 2 (9) ◽  
pp. 3208-3212 ◽  
Author(s):  
V. Torres-Costa ◽  
F. Pászti ◽  
A. Climent-Font ◽  
R. J. Martín-Palma ◽  
J. M. Martínez-Duart
Keyword(s):  
Porous Silicon ◽  
Interference Filters

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

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