Laser Bandpass Filter

The laser line bandpass filter is placed in the optical path between the laser and the sample.

Laser bandpass filter.

The highly reflective side of the filter should generally face the source minimizing the thermal load on the blocking glass and epoxies. 2 2 nm maximum this part is not available for custom sizing. This ensures that any external ambient light is blocked and only the laser line wavelength is passed. Transmission and optical density curves for individual filters are available by clicking on the blue info icon for each individual filter below.

Bandpass filters with extremely narrow passbands. Bandpass and laser line filters are available in the visible near ir and infrared ranges. Laser line filters are centered on the wavelengths of standard lasers and suppress underground plasma and secondary emissions in order to prevent the distortion of measurement signals. Each filter is mounted in a black anodized alumi.

The last two which rely on. 248 6 nm maxline laser clean up filter laser wavelength 248 6 nm t abs 40 248 6 nm fwhm of 1 7 nm typical. Home spectroscopic filters bandpass filters laser line laser line iridian s laser line filters are amongst the best in the world featuring high transmittance greater than 90 in the pass band. The highly reflective side of the filter should generally face the source minimizing the thermal load on the blocking.

It is important to pay attention to the tolerance. Narrow bandwidth 1 3 nm and excellent blocking from 300 to 1200 nm. Thorlabs selection of dielectric coated spectral filters are presented here. The bandpass and laser line filters shown on this page feature center wavelengths of 700 nm to 1650 nm.

The center wavelength shifts linearly with temperature less than 0 02 nm c. Our premium bandpass filters are hard coated for higher transmission and are more durable and longer lasting than our standard bandpass filters. Tunable bandpass optical filters for spectroscopy come in many possible configurations including diffraction gratings acousto optic liquid crystal volume bragg gratings tilted multilayer filter coated plates and flat bandpass filters with bandpass center wavelength linearly varying across the filter many of these require complex and costly extra optics. To achieve the best results use filters with bandwidths as narrow as 1 2nm and optical densities of od 6 0.

The customer is free to choose the central wavelength in bandpass filters as well as the cut on and cut off wavelength in broadband bandpass filters. Bandpass filters dichroic beamsplitters edge and notch filters raman spectroscopy filters mirrors and fluorescence filters sets. Our laser line bandpass filters cover most of the common laser lines and feature excellent out of band blocking of less than 0 01 10 4. Different standard full width half maximum values in bandpass filters e g 1 1 2 4 3 8 or 11 are specified.