Rochester, NY--Semrock has begun the production of what it says is the world’s first 11-band filter, with all the bands having steep edges within a 100 nm wide spectral window (see figure). The filter has high transmission and exceptional blocking outside each of the 11 bands, says Semrock. The filter was designed specifically to match corresponding formaldehyde fluorescence-emission spikes in the 380 to 480 nm wavelength range.
The filter can be used to investigate the homogeneous charge compression ignition (HCCI) combustion process, an internal-combustion-engine process in which a uniform mix of fuel and oxidizer is compressed until it spontaneously ignites, usually in more than one location in the mix (HCCI is different than the diesel process, in which, while compression is also used to create spontaneous combustion, the fuel is injected).
Semrock notes that previously the company was the world’s first manufacturer of a five-band filter for multicolor fluorescence applications.