Optics Balzers linear variable filters operate from 300 nm to the near-infrared
Linear variable filters for use in laboratory analysis systems are coated to have a precisely defined spectral response. Various features can be customized and optimized according to the application. Different filters operate from 300 nm to the near-infrared range. The adjustable edge position of the transmission band can be adapted to the respective measurement task.
Optics Balzers
Liechtenstein
![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)