C35413 Shortpass Filter

The C35413 transmits UV through the yellow-green edge with its 50 % cut-off measured at 559.6 nm. Transmission peaks at 95.1 % near 528 nm, averaging above 92 % from 384 to 552 nm – a wide passband that captures violet, blue, cyan, green, and the very onset of yellow. Blocking drops below 1 % by 581 nm and holds under 0.8 % to 779 nm, providing broadband rejection of everything from yellow-orange through the near-infrared.

Key Advantages

• 560 nm cut-off with 95 % peak – T50 % at 559.6 nm captures the full cool-visible spectrum up to the yellow edge, peaking at 95.1 %.
• Broadband passband 384–552 nm – Averages > 92 % across nearly 170 nm of bandwidth, supporting multi-line excitation and broadband imaging.
• Deep blocking 581–779 nm – Average transmission under 0.8 % removes yellow, orange, red, and NIR contamination from the optical path.
• Hard-oxide durability – Ion-assisted sputtered hard coating withstands environmental exposure, solvents, and repeated cleaning.
• Custom formats – Round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21–3.8 mm, on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG glass.

Typical Applications

• Multi-fluorophore excitation – Passes DAPI, CFP, GFP, and YFP excitation bands simultaneously while blocking emission and ambient red-NIR light.
• Color temperature trimming – Removes warm tones from broadband white sources to produce cooler, daylight-balanced illumination for machine vision and photography.
• Environmental remote sensing – Defines the blue-green-yellow channel for multi-band vegetation and water-quality instruments.
• LED phosphor filtering – Cuts the warm yellow-orange phosphor tail from white LEDs, producing spectrally pure cool-white output.
• Theatrical & architectural lighting – Creates broad cool-toned washes with no warm spillover for visually crisp and modern stage designs.

KUPO Optics manufactures the C35413 to your exact specifications – rapid prototyping and volume production available. Contact us.