Fluorescence filter is a key component widely used in biomedical and life science instruments . It's main function is to isolate and select the excitation band and emission band.

A typical fluorescence system has three basic filters : an exciter , an emitter and a dichroic mirror . 

The characteristics of fluorescence filters are deep cutoff , small auto-fluorescence , and good surface quality , which are beneficial to fluorescence imaging . Therefore,it

is better to use single piece transparent glass as a substrate and two surfaces coating . However , most of single piece coating filters are high cost due to high difficulty in production . 

Optolong provides high-brightness and high-contrast fluorescence filter sets , coating on single piece transparent glass .  

Characteristics of Optolong fluorescence filters : 

· Hard coating , double sided coating 

· High transmittance , high-brightness 

· OD＞5 blocking , high-contrast , no crosstalk 

· Wavelength stability without shifting