Laser Bandpass Filter

The bandpass and laser line filters shown on this page feature center wavelengths of 700 nm to 1650 nm.

Laser bandpass filter.

Transmission and optical density curves for individual filters are available by clicking on the blue info icon for each individual filter below. 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. Our premium bandpass filters are hard coated for higher transmission and are more durable and longer lasting than our standard bandpass filters. Bandpass filters dichroic beamsplitters edge and notch filters raman spectroscopy filters mirrors and fluorescence filters sets.

To achieve the best results use filters with bandwidths as narrow as 1 2nm and optical densities of od 6 0. Each filter is mounted in a black anodized alumi. 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. Narrow bandwidth 1 3 nm and excellent blocking from 300 to 1200 nm.

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. Our bandpass filters feature a dielectric stack fabry pérot interferometer design. 2 2 nm maximum this part is not available for custom sizing. The highly reflective side of the filter should generally face the source minimizing the thermal load on the blocking glass and epoxies.

Each specification refers. Bandpass filters with extremely narrow passbands. Bandpass and laser line filters are available in the visible near ir and infrared ranges. The laser line bandpass filter is placed in the optical path between the laser and the sample.

The last two which rely on. Thorlabs selection of dielectric coated spectral filters are presented here. Different standard full width half maximum values in bandpass filters e g 1 1 2 4 3 8 or 11 are specified. 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.

It is important to pay attention to the tolerance. Laser line bandpass filters are ideal for transmitting laser light while suppressing ambient light as well as lower intensity secondary laser lines. This ensures that any external ambient light is blocked and only the laser line wavelength is passed. The highly reflective side of the filter should generally face the source minimizing the thermal load on the blocking.