A new and highly efficient tunable filter for illumination and imaging

摘要

A new, simple and highly efficient approach for tunable wavelength filtering is evaluated with a motorized angledependent tunable filter. This new device combines the flexibility of a monochromator with the imaging functionality ofa thin-film interference filter, and is ideal for use in both illumination and image acquisition in optical microscopes. Themain features include independent tuning of center wavelength and bandwidth, high transmission efficiency and circularround aperture with high damage threshold.