M32815 490-585 nm nominal rejection-region broadband notch filter

490-585 nm nominal rejection-region broadband notch filter (M32815)

M32815 is a broadband notch filter. Its measured curve has a low-transmission region at approximately 501-564 nm, with transmission recovering on either side. Choose it for broad spectral suppression rather than assuming a narrow laser-line stop.

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: 393-482 nm; 588-731 nm. Approximate measured intervals.
• Selected regions at or below 5% transmission: 501-564 nm. Measured sample intervals; confirm the required blocking for your order.
• Peak transmission: Approximately 94.7% at 613 nm. Peak wavelength is not the same as a defined centre wavelength.
• Measured edge at 50% transmission: Approximately 486.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary.
• Measured edge at 50% transmission: Approximately 581.6 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

• Broadband illumination shaping: Consider suppressing the indicated wavelength region while retaining shorter and longer wavelengths. Check that the desired signal lies outside the transition bands.
• Spectral contrast development: Evaluate whether reducing the rejected band improves contrast for a selected source and detector. Compare both remaining transmission regions with detector sensitivity.
• Multi-region optical experiments: Consider retaining light on both sides of the rejection band. Add channel-separation optics if independent measurements are required.

Choosing this filter

• Additional regions reach at least 50% transmission at approximately 382-486 nm. Include these in the detector and blocking assessment.
• 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.