Ultra-Narrow Band Tunable Filter

2005 ◽  
Author(s):  
Balam A. Willemsen
Keyword(s):  
Narrow Band ◽  
Tunable Filter

scholarly journals Detection and measurement from narrow-band tunable filter scans

2002 ◽  
Vol 329 (4) ◽  
pp. 759-774 ◽  
Author(s):  
D. Heath Jones ◽  
Patrick L. Shopbell ◽  
Joss Bland-Hawthorn
Keyword(s):  
Narrow Band ◽  
Tunable Filter

The visible to the near infrared narrow band acousto-optic tunable filter and the hyperspectral microscopic imaging on biomedicine study

2014 ◽  
Vol 16 (12) ◽  
pp. 125303 ◽  
Author(s):  
Chunguang Zhang ◽  
Hao Wang ◽  
Junfeng Huang ◽  
Qiang Gao
Keyword(s):  
Near Infrared ◽  
Narrow Band ◽  
Tunable Filter ◽  
Microscopic Imaging

Aotfs as Atomic Spectrometers: Basic Characteristics

1996 ◽  
Vol 50 (7) ◽  
pp. 885-892 ◽  
Author(s):  
Greg Fulton ◽  
Gary Horlick
Keyword(s):  
Inductively Coupled Plasma ◽  
Narrow Band ◽  
Atomic Emission ◽  
Peak Position ◽  
Tunable Filter ◽  
Inductively Coupled ◽  
Half Height ◽  
Light Filters ◽  
Basic Characteristics ◽  
Electronically Tunable

An electronic spectrometer based on an acousto-optic tunable filter (AOTF) is presented. These devices are electronically tunable, narrow-band light filters with no moving parts. The wavelength range from 350 to 600 nm can be covered with a single device, the entire spectrum is scanned in less than 1 s, and any wavelength can be randomly accessed in 0.1 ms. The resolution [full width at half-height (FWHH)] was determined to be 0.22 nm at 361 nm, and the standard deviation of peak position was usually less than 0.03 nm. Under software control, the AOTF can be stationary on a line, peak-hop between any 20 different lines, hop between 20 regions of any size, scan a spectrum, or operate as a wavelength modulation spectrometer. Operation of the spectrometer is illustrated by using hollow cathode and inductively coupled plasma atomic emission sources.

APPLICATION OF PHOTOREFRACTIVE FIBER AND WAVEGUIDE GRATINGS TO FAST SPEED NARROW BAND TUNABLE FILTERS

1999 ◽  
Vol 08 (01) ◽  
pp. 147-158 ◽  
Author(s):  
SHIZHUO YIN
Keyword(s):  
Narrow Band ◽  
Grating Period ◽  
Tunable Filters ◽  
Tunable Filter ◽  
Bragg Grating ◽  
Diffraction Effect ◽  
Preliminary Results ◽  
Fast Speed ◽  
Electro Optic ◽  
Waveguide Gratings

In this paper, the progress of the application of photorefractive fiber and waveguide crystal gratings to a narrow band, fast speed, tunable filter is presented. This novel filter is based on tunable Bragg grating. It uses the diffraction effect of Bragg grating to select the wavelength and the electro-optic effect of the grating to tune the effective grating period. Several approaches of fabricating this type of tunable Bragg grating based filter are discussed and some preliminary results are provided. It is shown that the tuning speed of this type of filter can be in the ns range and the bandwidth can be as narrow as 0.01 nm.

Polarization-independent, ultra-narrow band-pass and multi-wavelength tunable filter based on PS-PM-CFBG

2019 ◽  
Vol 443 ◽  
pp. 55-62
Author(s):  
Liangying Wu ◽  
Li Pei ◽  
Tigang Ning ◽  
Jingjing Zheng ◽  
Jing Li
Keyword(s):  
Narrow Band ◽  
Tunable Filter ◽  
Wavelength Tunable ◽  
Multi Wavelength ◽  
Band Pass ◽  
Polarization Independent

scholarly journals 3.15. Narrow-band imaging of the nuclear region of the Seyfert galaxy NGC1068

1998 ◽  
Vol 184 ◽  
pp. 119-120
Author(s):  
T. Ishigaki ◽  
H. Ohtani ◽  
T. Hayashi ◽  
S. Ozaki ◽  
T. Hattori ◽  
...  
Keyword(s):  
Spectral Resolution ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Seyfert Galaxy ◽  
Tunable Filter ◽  
Nuclear Region ◽  
Fabry Perot ◽  
Imaging Observation ◽  
Made In

A narrow-band imaging observation of the Seyfert galaxy NGC1068 was made in the Fabry-Perot mode of the Kyoto 3D Spectrograph attached to the 188cm telescope of the Okayama Astrophysical Observatory. We observed at wavelengths of Hα, [S ii]λ6716, [S ii]λ6731 and adjacent continua of the respective lines with a “tunable filter”, i.e. a gap-scanning etalon with a spectral resolution of 20 Å.

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