BH-S19 Shortpass filter
BH-S19 is a shortpass filter. The main high-transmission region is approximately 380-526 nm.
- Measured wavelength range: 380-780 nm
- Edge at 50% transmission: ≈ 545.2 nm
- Peak transmission: ≈ 95% at 501 nm
- Transmission ≥80%: 380-526 nm
- Custom options: Wavelength response, dimensions and operating conditions
Values shown are sample measurements. Final specifications are agreed for your order.
BH-S19 Shortpass filter
BH-S19 is a shortpass filter. The main high-transmission region is approximately 380-526 nm.
- Measured wavelength range: 380-780 nm
- Edge at 50% transmission: ≈ 545.2 nm
- Peak transmission: ≈ 95% at 501 nm
- Transmission ≥80%: 380-526 nm
- Custom options: Wavelength response, dimensions and operating conditions
Values shown are sample measurements. Final specifications are agreed for your order.
Shortpass filter (BH-S19)
BH-S19 is a shortpass filter. The main high-transmission region is approximately 380-526 nm. Consider it when you need to pass the shorter wavelengths used by your light source or detector. Check the longer-wavelength response as well as the main cut-off.
Optical performance
- Measured wavelength range: 380-780 nm. Performance outside this measured interval is not established by this curve.
- Selected regions at or above 80% transmission: 380-526 nm. Approximate measured intervals.
- Peak transmission: Approximately 95% at 501 nm. Peak wavelength is not the same as a defined centre wavelength.
- Measured edge at 50% transmission: Approximately 545.2 nm. Interpolated absolute-transmission crossing, checked against the factory summary.
- Customization: We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.
These values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.
Applications to consider
- Short-wavelength illuminated inspection: Consider illumination within 380-526 nm when longer-wavelength background interferes with the measurement. Check any secondary transmission against the detector response.
- Illumination-band shaping: Evaluate retaining the shorter-wavelength part of a broadband source. Add a lower spectral limit if unwanted UV or shorter wavelengths must also be removed.
- Fluorescence source conditioning: Consider trimming longer-wavelength output from an excitation source. Confirm signal transmission and rejection at the actual wavelengths rather than assuming a complete fluorescence filter set.
Choosing this filter
- Check the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.
- Tell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.
Custom options
Start with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.
Transmission spectrum
Questions about BH-S19
What high-transmission regions should I compare for BH-S19?
The measured regions at or above 80% transmission are 380-526 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.
How should I read the transition reported for BH-S19?
The reference edge at 50% transmission is approximately 545.2 nm. This is an interpolated crossing on the measured sample curve. If your signal sits near that transition, confirm the allowed edge tolerance and working angle before ordering.
Discuss this filter with KUPO - include the product reference, source wavelength, working angle and required dimensions.