Midwest Optical Systems intros blue bandpass filters
The BP450 indigo bandpass filter enhances viewing of subjects illuminated by a 450 nm blue LED; for UV fluorescence applications, its broad bandwidth and high peak transmission results in significantly brighter, higher contrast images. The BN450 narrow indigo bandpass filter has utility with 3D blue laser triangulation systems used for measuring position, distance, level, displacement, proximity, and profiles of objects. Both filters are manufactured with the company’s StablEDGE technology and coated with its BBAR antireflection coating.
Midwest Optical Systems (MidOpt)
Palatine, IL
![FIGURE 1. This functional prototype of a combined system for diagnosing, monitoring, and treating cataracts includes eye positioning location (a), LEDs to excite fluorescence for quantitative diagnosis and to provide photobleaching treatment (b), a continuously variable bandpass filter (CVBPF)-enabled spectrometer (c), a single-photon counting photomultiplier tube (PMT; [d]), and a second eye-positioning location (e).](https://img.laserfocusworld.com/files/base/ebm/lfw/image/2020/03/2004LFW_pus_1.5e8346083bae0.png?auto=format,compress&fit=crop&q=45&h=139&height=139&w=250&width=250)
