Advances in filter technology for multiphoton microscopy

A new optical interference filter deposition technology demonstrated that provides the deep blocking and extended transmission regions required for multiphoton fluorescence applications. This technology allows for the deposition of high phase thickness coatings with many more layers than was previously possible. Theoretical blocking at a level greater than optical density 9 is achieved. We present examples of shortpass edge filters and bandpass filters with high transmission and deep blocking. A dichroic mirror with high reflection in the near infrared and an extended region of high transmission throughout the visible is also presented.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.