Economy Shortpass Filters, 400-1100nm CWL
Shortpass Filters transmit light with wavelengths shorter than the cutoff wavelength and block light of longer wavelengths. Tuniu Optics shortpass filters feature wide stop bandwidth, high optical density, steep spectral transition and high transmittance. They are widely used in fluorescence excitation spectroscopy, Raman spectroscopy, spectral splitting and astronomical observation. Also suitable for imaging optical systems and machine vision systems, they effectively eliminate stray interference light outside the working band, greatly improving imaging clarity and system sensitivity. We supply a large selection of in-stock standard shortpass filters, and also provide customized solutions according to your technical requirements.
Precautions
If the filter surface becomes contaminated, gently wipe it with lint-free lens tissue dampened with alcohol. Do not use rough cloth or paper, or clean merely with water, as this will damage the optical surface and coating of the shortpass filter.
Parameters
| Material: H-K9L (CDGM) | TWE: λ/4@633 nm |
| Parallelism: < 30” | Surface Quality: 60/40 |
| Dia. tolerance: + 0.0/- 0.1 mm | Thickness: 2 ± 0.2 mm |
| Central wavelength(λC): ± 2% | Transmission: Tavg > 85% |
| Blocking depth: OD2 | Cutting Slope**: < 3% |
| Clear aperture: > 85% | AOI: 0° |
*Central wavelength(λC): the wavelength with transmission = 50% Tmax
**Cutting slope: (λ(T80%) -λ(T10%))/λ(T10%) *100%
Model
| Dia.(mm) | CWL(nm) | Transmission band(nm) | Blocking(nm) |
| 12.5/25.0/50.0 | 400nm | 250~385nm | 420~485nm |
| 450nm | 250~430nm | 470~545nm | |
| 500nm | 250~480nm | 520~610nm | |
| 550nm | 250~530nm | 575~665nm | |
| 600nm | 400~580nm | 625~795nm | |
| 650nm | 400~630nm | 675~850nm | |
| 700nm | 400~680nm | 725~900nm | |
| 750nm | 400~725nm | 800~990nm | |
| 800nm | 400~775nm | 850~1050nm | |
| 850nm | 400~820nm | 910~1110nm | |
| 900nm | 425~865nm | 960~1170nm | |
| 950nm | 450~910nm | 1025~1235nm | |
| 1000nm | 465~940nm | 1085~1305nm | |
| 1050nm | 485~1000nm | 1130~1370nm | |
| 1100nm | 510~1050nm | 1180~1440nm |