A 546 nm filter is a type of optical bandpass filter centered at 546 nm, with its main characteristics and applications summarized as follows:

1. Optical Characteristics
   ? Center Wavelength (CWL): 546 nm (green light).
   ? Full Width at Half Maximum (FWHM): Common specifications are 8–10 nm, with 10 nm being a standard product.
   ? Peak Transmittance: >50%, typically >75% for biochemical/medical-grade products.
   ? Blocking Depth: Optical density OD≥3–5 within the 200–1100 nm range, with strong out-of-band rejection.
   ? Tolerance: Center wavelength ±2 nm, bandwidth ±2 nm.
   ? Process: Ion-sputtered hard coating, black anodized aluminum housing, resistant to humidity and wiping.

2. Typical Applications
   ? Biochemical Analysis: Used as the 546 nm channel in automated biochemical analyzers and microplate readers for colorimetric determination of specific chemical components in body fluids.
   ? Microscopy: Commonly used for green excitation (G excitation) in fluorescence microscopy; also employed for color balance compensation to achieve more accurate color reproduction under halogen lamp illumination.