9mm Dia. x 18mm EFL, UV-VIS Coated, Near UV Achromatic Lens

Product Details Excellent Transmission in 345 – 700nm Range Ideal for use with NUV LEDs and Mercury Lamps Low-Cost, Cemented Design TECHSPEC Near-UV (NUV) Achromatic Lenses are specifically designed to minimize the spot size for polychromatic illumination in the 345 – 700nm region. The achromatic lenses are ideal for use in fluorescence applications, as well as for simple focusing of common UV light sources, such as Mercury Arc Lamps, UV LEDs, and Tripled Nd:YAG lasers. Featuring a simple cemented design, the lenses are an excellent alternative to air-spaced doublets and triplets for the UV. TECHSPEC Near-UV (NUV) Achromatic Lenses feature >90% transmission at 360nm and provide >50% transmission at 334nm. The lenses feature either N-FK5 or F2HT substrate and a UV-VIS coating. Specifications General Type: Achromatic Lens Physical & Mechanical Properties Diameter (mm): 9.00 +0.0/-0.025 Center Thickness CT (mm): 5.50 ±0.10 Center Thickness CT 1 (mm): 4.00 ±0.05 Center Thickness CT 2 (mm): 1.50 ±0.05 Edge Thickness ET (mm): 4.02 Clear Aperture CA (mm): 8.1 Centering (arcmin): <1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 18.00 Focal Length Tolerance (%): ±1 Focal Length Specification Wavelength (nm): 405.00 Back Focal Length BFL (mm): 15.05 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-FK5 / F2HT f/#: 2 Numerical Aperture NA: 0.25 Coating: UV-VIS (345-700nm) Coating Specification: R avg ≤1.5% @ 345 - 700nm Wavelength Range (nm): 345 - 700 Radius R 1 (mm): 9.99 Radius R 2 (mm): -8.07 Radius R 3 (mm): -24.83 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Regulatory Compliance RoHS 2015: Exempt × Certificate of Conformance: View × Reach 247: Compliant ×