A manufacturer of optical filters for the biotechnology and analytical instrumentation market, Semrock Inc. has issued its 2006-2007 catalog. The 48-page, full-color publication presents filtersfor applications in such areas as Raman instrumentation, biomedical laser systems, and fluorescence instrumentation and microscopy. Among the new products that are highlighted are single- and multiband bandpass filters, and single-, dual- and triple-edge dichroic beamsplitters. The MaxDiode laser diode cleanup filters, featuring ultralow-ripple passbands; the StopLine single- and multinotch laser line types, manufactured in volume; and the Bright-Line Clinical fluorescence variety for clinical microscopy also are included. Technical notes are provided.