IdealPhotonics' multimode fiber filter cube is a modular, detachable optical component. Its cubic structure integrates bandpass/cutoff filters, beam splitters, and other multi-layered coated elements, supporting rapid filter replacement (e.g., wavelength switching from 400-700nm) and optical path adjustment, adapting to the flexible experimental needs of multimodal microscopy and optogenetics.Parameters such as passband wavelength (e.g., 470±10nm), transmittance (>90%), cutoff depth (OD>6), aperture compatibility (e.g., Ø5mm), and disassembly repeatability (±5μm) directly determine its spectral selectivity and modular optical path stability.