Narrow optical band-pass filters and nanoplasmonics

Synthesis of Optical Band-pass Chebyshev Filters

A Design of Narrow-Band Band-Pass

C l c3 Abstract-In this paper, a design method is described for low-sensitivity narrow-band band-pass switched-capacitor filters (SCF's) using a pseudo-2-path principle and a capacitor-error-free voltage inversion. The proposed method is based on the low-pass to high-pass transformation using voltage inversion, the pseudo2-path principle, the capacitance-ratio reduction technique and a very low...

Characterization of Narrow Band Filters for

We present a characterization of two narrow band lters commonly used in Infrared Astronomy. Our study mainly quantiies the eeect of temperature and tilt angle on the central wavelength and width of the transmission bands of such lters. This allows to evaluate some important eeects that must be taken into account to have good quality astronomical images. EEects as the limitation of the eld of vi...

ACS CCDs UV and narrow- band filters red leak check

We present results of the observations of the star 15 Mon, obtained with the aim of checking the impact of red leaks in the UV (and U-band) and two narrow-band filters on ACS CCDs. The red leak in the F220W, F250W and F330W filters appears to be smaller than measured in pre-flight tests. We derive updated passbands for the three filters and we present the updated correction table for different ...

Bandwidth-variable tunable optical filter unit for illumination and spectral imaging systems using thin-film optical band-pass filters.

An optical filter unit is demonstrated, which uses two successively arranged tunable thin-film optical band-pass filters and allows for simultaneous adjustment of the central wavelength in the spectral range 522-555 nm and of the spectral bandwidth in the range 3-16 nm with a wavelength switching time of 8 ms∕nm. Different spectral filter combinations can cover the complete visible spectral ran...