Gradient Filters

Variable Light Transmission

Reynard Corporation offers a variety of variable filters such as: Bullseye® Apodizing, Linear Apodizing, CVND, CVNT, LVND and LVNT. Variable Gradient Filters are optical filters that have variable light transmission and are designed to operate from the UV to the far Infrared. They can be produced as small as a few millimeters to over 250mm in diameter or square. Reynard offers custom sizes and densities upon request.

Custom prototypes to volume production are available.

Contact us with your custom requirements!

Bullseye^® Apodizing Filters

Reynard Corporation offers Bullseye^® Apodizing filters used to eliminate undesirable intensity variations in optical systems. There are two types: Clear Center, where the Gaussian density distribution increases in a radial direction from the center to edge and Dark Center, where the density increases from the edge to the center of the substrate. Bullseye^® Apodizing filters which can be designed for any mathematical function regardless of the size of the beam.

Custom sizes and densities are available upon request.

Specifications:

Linear Apodizing Filters

Linear Apodizing filters are customizable density gradient filters that have constant density in one direction and variable ND filter in the other direction. Two types: dark in center to clear on the outer edges or clear in center to dark on the outer edges. These filters are used to eliminate undesirable intensity variations in optical systems. There are two basic types of these filters: 1) Dark in the center to clear on the outer edges, or 2) Clear in the center to dark on the outer edges.

Custom sizes and densities are available upon request.

Specifications:

Circular Variable Neutral Density Filters (CVND)

Circular Variable Filters (UV-VIS-IR) are filter wheels that linearly attenuate light as the filter is rotated. As the filter rotates, the beam intensity is customized due to the density variation of a gradient metallic coating around the filter. These filters are fully customizable in optical density gradient function, transmission gradient function, substrate type, coating materials, and size to meet customer requirements. Densities can be supplied as a standard linear or a customized gradient function.

Custom sizes and densities are available upon request.

Specifications:

Circular Variable Neutral Transmission Filters (CVNT)

The Circular Variable Neutral Transmission filters (UV-VIS) are designed to attenuate light as a function of transmission instead of density. These CVNT filters are much more sensitive to position at the lower transmission values than are linear density filters. Sizes are available from 25mm to over 200mm in diameter.

Custom sizes and densities are available upon request.

Specifications:

Linear Variable Neutral Density Filters (LVND)

The Linear Variable Neutral Density Filter is used to attenuate light as the filter is translated. The filters can be used with white light as well as with low power lasers. A large finite aperture can be attenuated by translating two filters in opposite directions.

Custom sizes and densities are available upon request.

Specifications:

Linear Variable Neutral Transmission Filters (LVNT)

The Linear Variable Neutral Transmission (UV-VIS-IR) filters are designed to attenuate light as a function of transmission instead of density. These LVNT filters are much more sensitive to position at the lower transmission values than are linear density filters.

Custom sizes and densities are available upon request.

Specifications: