altReynard Corp. (San Clemente, CA) provides Circular Variable Neutral Density (CVND) filters for use in optical systems to change light intensity from 100% to less than 0.1%. The filters are specified for linear optical density or transmission, may be sized to match the end-use, and are customizable in optical density gradient function, transmission gradient function, substrate type, and coating materials. The units can be supplied from 1.0 to 8” in diameter. Gradient coatings can be supplied from 45° to 360° of rotation.

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