Terahertz-Filter

Name: Terahertz-Filter
Brand: Swiss Terahertz

Band pass BPF · Band stop BSF · Low pass LPF · High pass HPF

Bandpass-, Bandsperr-, Tiefpass- und Hochpassfilter für Terahertz. Spitzentransmission > 70 %, typisch > 90 %. Mittenfrequenz auf < 5 % gehalten, anpassbar auf < 1 %, und Bandbreite < 30 %, anpassbar auf < 1 %. Grössen bis 150 mm, ab 100 Euro für einen 10 mm Typ I.

Spitzentransmissiontyp. > 90 %

Mittentoleranz< 5 %, to < 1 %

Bandbreite< 30 %, to < 1 %

Grösseup to 150 mm

ab 100 Euro

Typ I, 10 mm

Versand ab Zürich
Lieferzeit auf Anfrage

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Four filter families, all metal mesh: **band pass (BPF)** for isolating one line, **band stop (BSF)** for rejecting one, **low pass (LPF)** for cutting everything above a frequency, and **high pass (HPF)** for cutting everything below it. Peak transmission is above 70 % and typically better than 90 %.

Centre frequency is held to within 5 % as standard and can be specified to better than 1 %; bandwidth is under 30 % as standard and can be narrowed below 1 %. Clear apertures run to 150 mm. Anything outside the standard range is made to order — tell us the frequency, the width and the aperture you need.

Every curve in the figures below is a measurement, not a model. The low-pass data was taken on a Perkin-Elmer FTIR spectrometer with each sample scan ratioed against its own open-beam reference; where a second trace appears above the filter curve, that is the reference.

▸ **Low pass, 3 THz type** — measured half-power cut-off **3.0 THz**, passband 87 %, blocking 1.4 % (−18.5 dB) median from 3.6 to 24 THz.
▸ **Low pass, 20 THz type** — measured half-power cut-off **21.5 THz**, passband 83 %, blocking 0.5 % median from 23 to 30 THz.
▸ Filter designations below are nominal. The measured cut-off of a mesh filter sits a little above the name it is sold under; both numbers are given so there is no ambiguity.

Allgemeine Spezifikationen

Spitzentransmission	> 70 % Typ. > 90 %
Toleranz der Mittenfrequenz	< 5 % anpassbar < 1 %
Bandbreite	< 30 %. Anpassbar < 1 %
Grösse	up to 150 mm

Typen & Preise


Type I	Bandpass (BPF)	< 3 THz	10 mm — 100 Euro · 19 mm — 400 Euro · > 19 mm — Kontakt
Type II	Bandpass (BPF)	3 – 30 THz	Kontakt
Type III	Band pass (BPF), high rejection	—	Kontakt
Type IV	Tiefpass (LPF)	measured examples at 3, 9.5 and 20 THz	Kontakt
—	Bandsperre (BSF)	made to order	Kontakt
—	Hochpass (HPF)	made to order	Kontakt