Bullseye Apodizing Filters
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Perfecting Your Light™ Bullseye® Apodizing Filters Eliminates undesirable intensity variations KEY FILTER BENEFITS PERFORMANCE Filters can be designed to be used from the UV to the far IR. ABSORPTION Bullseye® Normal Apodizing filter, Dark in center Bullseye® Inverse Apodizing filter, Clear in center 10% to 35% absorption, depending on coating materials. DESCRIPTION: Bullseye® Apodizing filters are customizable density gradient filters that change radially from the center to the outside of the optical component. These filters are used to eliminate undesirable intensity variations in optical systems or to modify the wavefront of an illumination source. Standard, catalog Gaussian density distribution filters change in a radial direction from the center to edge or from the edge to the center of the substrate. These filters are manufactured on high quality BK-7 substrates, are available with an optical density from 0.04 to OD3, and come in diameters of 25mm or 50mm. Reynard Corporation also offers customized Bullseye® Apodizing Filters which can be designed for any mathematical function regardless of the size of the beam. These filters are produced on a custom basis to meet any distribution function, available on any substrate material and size, and can be designed to operate at any wavelength from the UV to the far infrared. Bullseye® filters come in two configurations, normal and inverse apodizing: Normal: The Bullseye® normal apodizing filter function decreases in density radially from a dark center, where light is usually at its peak intensity, to the outside edge, where it can become completely transparent. Normal apodizing filters are used to modify a Gaussian light source into a 'top-hat' type of output with a flat wavefront. Density gradients can be customized to suit any application. SIMPLICITY The filter can be applied to a number of different substrate types & sizes. UNIFORMITY Corrects for non-uniformity in illuminations systems. SIZE Standard 25mm or 50mm. Customize to your system requirements. Inverse: The Bullseye® inverse apodizing filter function increases density from a clear or light center to a darker outside edge. These filters are typically used to create a welldefined Gaussian wavefront or can be used to eliminate unwanted intensity variations in an optical system. Contact us to see how we can help your system achieve the high levels of performance of your application. We will assist you in specifying the Bullseye® Apodizing filter for your needs. www.reynard

Perfecting Your Light™ The distribution functions can be defined by either density (D) or transmission (T). These functions can range from a simple linear equation to much more complex algebraic, exponential, or geometric functions as shown below: Examples of Custom Bullseye® Apodizing density and transmission gradients SPECIFICATIONS Property Substrate Material Surface Quality Transmitted Wavefront Error Beam Deviation Calibrated Wavelength Laser Damage < 30 W/cm2 CW, typical Not recommended for Pulse Laser Use www.reynardcorp.com Tel (949) 366-8866 • Fax (949) 498-9528 •...