CASTECH’s aspherical lenses, precisely crafted using CNC polishing technology, offer superior optical performance, particularly where minimized spherical aberration or single-element configurations are essential. With a broad selection of AR coatings and materials extending from DUV to IR, these lenses are iteratively ground and polished in a computer-controlled processing center to ensure optimal surface quality, focal length accuracy, and minimal irregularities. Our lenses are suitable for diverse applications and customizable to exact specifications.

Key Features

• Material Range: From Deep Ultraviolet (DUV) to Infrared (IR)
• Custom Dimensions & Shapes: Precision sizing available from 5 to 200 mm diameter
• Clear Aperture: Central 90% of diameter for maximum light throughput
• High Precision: Irregularity of λ/10 at 632.8 nm
• Surface Quality: Superior finish with a 10-5 scratch-dig rating
• Centration Accuracy: Less than 3 arcminutes
• Coating Options: Standard and custom AR coatings to enhance transmission
• Laser Damage Threshold: High tolerance for demanding applications

CASTECH also offers various aspherical designs, including cylindrical, hyperbolic, axicon, and free-form lenses, ensuring high-quality performance in diverse optical setups.