600nm Bandpass Filter

Emitting in the orange-red visible spectrum, 600nm light features concentrated energy at its specific wavelength and is less prone to extensive absorption by common media, enabling targeted spectral interaction.

  • Application 1: (Optical Metrology) In spectrometers, a 600nm bandpass filter precisely isolates reflection/transmission signals from target substances at this wavelength, eliminating interference from adjacent bands to enhance compositional analysis accuracy.
  • Application 2: (Biomedical Imaging) Integrated into fluorescence microscopy systems, this filter efficiently removes stray light outside the 600nm range, allowing clear visualization of specific fluorescent signals emitted by cells or biomolecules labeled with orange-excited dyes.
  • Application 3: (Industrial Quality Control) Within semiconductor wafer inspection tools, a 600nm bandpass filter focuses monochromatic light at this wavelength onto the wafer surface, facilitating precise detection of micron-scale defects or thin-film thickness variations through analysis of reflected light uniformity.
600nm Bandpass Filter
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Center Wavelength (nm)
FWHM (nm)
Optical Density(OD)

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Center Wavelength (nm)
FWHM (nm)
Optical Density(OD)
CN104614795B - Broadband deep cut-off red light fluorescence filter

CN104614795B - Broadband deep cut-off red light fluorescence filter

Context: This patent describes a composite filter design intended to isolate red light fluorescence signals while blocking interference.

Usage: A 600nm bandpass filter is used as a core component, physically stacked or optically aligned with a 350-410nm high-reflectivity (HR) long-wave pass filter.

Function: The filter acts to precisely select the 600nm spectral region (often the emission peak of specific red fluorophores) while the auxiliary filters cut off UV or blue excitation light.

Result: The combination achieves a "deep cut-off," meaning it provides an extremely dark background (high signal-to-noise ratio) for detecting faint red fluorescence, which is critical for high-sensitivity optical instruments.

US20190195894A1 - Microbial-based biosensors for detection of small molecules

US20190195894A1 - Microbial-based biosensors for detection of small molecules

Context: A high-throughput screening platform that uses bioluminescent bacteria to detect specific analytes (small molecules). The system captures images of bacterial colonies reacting to these molecules.

Usage: A 550-600nm bandpass filter is used in the imaging path of the "PhotonIMAGER" or similar detector system.

Function: It isolates the specific emission wavelength of red-shifted firefly luciferase variants (which emit around 615nm or within the 600nm tail) from other potential light sources or overlapping bioluminescent signals (like standard green luciferase).

Result: This allows the system to distinguish between different bacterial strains (e.g., control vs. sensor strains) on the same plate based on their color emission, enabling rapid, automated screening of protein libraries.

US10656089B2 - Systems, devices, and methods for time-resolved fluorescence spectroscopy

US10656089B2 - Systems, devices, and methods for time-resolved fluorescence spectroscopy

Context: A medical device for characterizing biological tissue (in vivo or ex vivo) using time-resolved fluorescence (TRF). This is often used to detect changes in tissue health or pathology.

Usage: The system uses a demultiplexer equipped with multiple spectral filters, including a bandpass filter centered at or near 600nm (often part of a set like 446/523/600/677nm).

Function: It separates the broad fluorescence signal returning from the tissue into distinct spectral channels. The 600nm channel captures the emission decay of specific endogenous fluorophores (like porphyrins or FAD) or exogenous dyes.

Result: By analyzing the fluorescence lifetime in the 600nm band, the system can differentiate between healthy and diseased tissue (e.g., tumors) with higher accuracy than simple intensity imaging.

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