BP420-30 대역 통과 필터(CWL=420nm, FWHM=30nm)

Biomedical & Chemical Analysis - Porphyrin Detection

• Porphyrin Excitation: Porphyrins absorb strongly in this region and fluoresce in the red (~600–700 nm). This filter can serve as an excitation filter to stimulate porphyrin fluorescence.

Recommended Light Sources

To maximize the efficiency of this filter, you should use light sources that have strong output in the 405–435 nm range: High-Power LEDs

• 415 nm or 420 nm LEDs: These are the most efficient match. They emit a narrow spectrum that fits almost perfectly inside the filter's 30 nm bandwidth, resulting in very little wasted energy.
• 405 nm LEDs: While common, 405 nm sits right on the edge of this filter's passband (405–435 nm). Depending on the steepness of the filter's slope, it might cut off some of the light. A 415/420 nm LED is a better fit.

Machine Vision & Industrial Inspection

• Surface Inspection: Violet light (shorter wavelength) scatters more on rough surfaces than red light, helping to reveal fine surface scratches, dust, or texture defects that might be invisible under longer wavelengths.

Recommended Light Sources

• High-Intensity Violet LED: Violet light has a shorter wavelength (~420 nm) compared to red or green. This shorter wavelength scatters significantly more when it hits microscopic imperfections (like dust or fine scratches), making them appear bright against a dark background.