Cut-off filters
Special filters (cut-off filters). The blue light components of the visible spectrum can cause glare because it is precisely this light component that is strongly scattered at the blurring of the cornea, the eye lens and the vitreous body. This short-wave, energy-rich component of the visible spectrum, which leads to substantial scattering and reduced visual performance and contrast, can be absorbed by cut-off filters. These special filters completely absorb short-wave blue and violet light. There are cut-off filters with an absorption edge of varying wavelengths (e.g. 450 nm, 511 nm, 527 nm, 550 nm).
Clip-on-Holder• Ø 37 mm, black Art.-No. 5010
• Ø 23 mm, black Art.-No. 5011
Cut-off filters
• Colour: 450 nm (yellow), brightening and high contrast in half light.
• Ø 37 mm Art.-No. 5070 450 nm
• Ø 37 mm Hart & Super-ET Art.-No. 5074 450 nm
• Ø 23 mm Art.-No. 5071 450 nm
• Ø 23 mm Hart & Super-ET Art.-No. 5077 450 nm
• Colour: 511 nm (orange 35%), high contrast in dim light and normal light.
• Ø 37 mm Art.-No. 5070 511 nm
• Ø 37 mm Hart & Super-ET Art.-No. 5074 511 nm
• Ø 23 mm Art.-No. 5071 511 nm
• Ø 23 mm Hart & Super-ET Art.-No. 5077 511 nm
• Colour: 527 nm (orange 55%), high contrast in normal light.
• Ø 37 mm Art.-No. 5070 527 nm
• Ø 37 mm Hart & Super-ET Art.-No. 5074 527 nm
• Ø 23 mm Art.-No. 5071 527 nm
• Ø 23 mm Hart & Super-ET Art.-No. 5077 527 nm