Request InfoMcPHERSONMcPherson Inc. has released double monochromators featuring dual 350-mm focal length with f/4.8, ±0.07-nm accuracy in the visible, ±0.005-nm reproducibility and continuous stray light rejection of 10-9 to 10-10. The double additive monochromator includes mechanical linkage of two sine drives and wavelength control via a single-motor, high-resolution-scan drive, while the subtractive unit uses either single- or dual-motor drives, depending on the configuration. 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