Blue optical filter Lambda VF-5™/ VF-1™

tunable

Sutter Instrument introduces two new filter changers specially designed for wavelength selection over a wide spectral range to any given nanometer value. The Lambda VF-5™ and Lambda VF-1™ employ the innovative VersaChrome® thin -film filter technology from Semrock® to provide outstanding bandpass characteristics such as high transmission (close to 100%), steep edges and out of band blocking. Since these filters pass an image, they are equally suitable for emission and excitation paths. A specific wavelength within the wide spectral range of each filter is obtained by adjusting the angle of incidence from 0 to 60 degrees. This tuning causes little or no change in spectral performance of the filter regardless of the state of polarization of the light passing through the filter. The current VersaChrome® series has 7 filters covering 338 to 800nm. By simply selecting the desired center-wavelength on the controller, the Lambda VF-5 automatically moves and tilts one of its five filters into position. Users can select any combination of filters offered by Semrock® for the Lambda VF-5 (which holds up to 5 filters) or any single filter in the series for the Lambda VF-1.