12.5mm Dia x -35mm FL VIS 0° Coated, Negative Achromatic Lens

Product Details VIS 0° and VIS-NIR Coatings 6.25 – 25mm Diameter Options MgF 2 Coated Negative Achromatic Lenses also Available TECHSPEC Broadband AR Coated Negative Achromatic Lenses are corrected for color and on-axis aberrations. These lenses, consisting of two optical elements cemented together, are commonly used as Barlow lenses to extend focal lengths. The achromatic lenses are available in various diameter sizes and VIS 0° or VIS-NIR coating options. TECHSPEC Broadband AR Coated Negative Achromatic Lenses are offered in 6.25 – 25mm diameter options. MgF2 Coated Negative Achromatic Lenses are also available. Specifications General Type: Negative Achromatic Lens Physical & Mechanical Properties Diameter (mm): 12.50 +0.0/-0.025 Center Thickness CT (mm): 3.56 ±0.10 Center Thickness CT 1 (mm): 2.00 ±0.05 Center Thickness CT 2 (mm): 1.56 ±0.05 Edge Thickness ET (mm): 4.74 Clear Aperture CA (mm): 11.50 Centering (arcmin): <1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): -35.00 Focal Length Tolerance (%): ±1 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): -36.51 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 / N-SF5 f/#: 2.8 Numerical Aperture NA: 0.18 Coating: VIS 0° (425-675nm) Coating Specification: R avg ≤0.4% @ 425 - 675nm Wavelength Range (nm): 425 - 675 Radius R 1 (mm): -21.66 Radius R 2 (mm): 17.48 Radius R 3 (mm): 50.54 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Regulatory Compliance RoHS 2015: Compliant × Reach 219: Compliant × Certificate of Conformance: View ×