Thin-Film Coatings: Bullseye® Apodizing Filters

• Model: Thin-Film Coatings: Bullseye® Apodizing Filters
• Company: Reynard Corporation
• Type: Filters
• Diameter / Dimension: 25mm - 100mm
• Filter Category: Neutral Density Filter
• Applications: Astronomy, Biomedical/Medical, Communications, Industrial, Military, Scientific Research, Other
• Optical Density (OD): 0 to 5
• Surface Quality: 80-50 scratch/dig
• TWE: < 2 waves per 25 mm
• Wavelength: 375 nm to IR
• Calibrated Wavelength: 632.8 nm
• Beam Deviation: < 3 Arcminutes

Continuously variable apodizing filters are used to eliminate intensity variations in optical systems. Inserting a variable transmission filter at the aperture stop will modify the diffraction pattern of a lens.

Two types: Clear Center, density distribution increases in a radial direction from the center to the edge, and Dark Center, density increases from the edge to the center of substrate.