太赫兹滤波器
Band pass BPF · Band stop BSF · Low pass LPF · High pass HPF
用于太赫兹的带通、带阻、低通和高通滤波器。峰值透过率 > 70 %，典型 > 90 %。中心频率控制在 < 5 %，可定制至 < 1 %；带宽 < 30 %，可定制至 < 1 %。尺寸最大 150 mm，10 mm Type I 起价 100 欧元。
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.
选择规格 — 型号与价格立即显示。
| 峰值透过率 | > 70 % 典型 > 90 % |
|---|---|
| 中心频率公差 | < 5 %，可定制至 < 1 % |
| 带宽 | < 30 %。可定制至 < 1 % |
| 尺寸 | up to 150 mm |
| Type I | 带通滤波器 (BPF) | < 3 THz | 10 mm — 100 欧元 · 19 mm — 400 欧元 · > 19 mm — 请联系 |
| Type II | 带通滤波器 (BPF) | 3 – 30 THz | 联系 |
| Type III | Band pass (BPF), high rejection | — | 联系 |
| Type IV | 低通滤波器 (LPF) | measured examples at 3, 9.5 and 20 THz | 联系 |
| — | 带阻滤波器 (BSF) | made to order | 联系 |
| — | 高通滤波器 (HPF) | made to order | 联系 |
滤波器
低通滤波器 (LPF)
带通滤波器 (BPF)
