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Precision Objective Lenses

Precision Objective Lenses
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O p t i c s 493 Email: sales@newport.com • Web: newport.com TECHNICAL REFERENCE AND FUNDAMENTAL APPLICATIONS LENS SELECTION GUIDE SPHERICAL LENSES CYLINDRICAL AND SPECIALTY LENSES OPTICS SETS OPTICAL SYSTEMS MIRRORS PRISMS Precision Objective Lenses Our precision objectives feature optical designs well corrected for infinite conjugate with the added benefit of a working distance more than 5 times as long as ordinary microscope objectives. This long working distance makes these lenses useful where other objectives are prohibited by mechanical constraints. These objectives are excellent for laser collimating and focusing applications. Ordering Information Model Magnification Numerical Aperture (NA) Focal Length (mm) Working Distance (mm) Clear Aperture (mm) Depth of Focus (ìm) Visible N-20X-LD 20x 0.30 10.0 17.0 6.3 3.0 N-40X-LD 40x 0.60 5.0 3.0 6.9 0.7 Near Infrared N-8X-TIR 8x 0.25 25.0 7.0 12.5 9.0 N-20X-TIR 20x 0.30 10.0 17.0 6.3 6.0 N-20X-APO-IR 20x 0.35 10.0 6.8 5.2 4.0 N-40X-TIR 40x 0.60 5.0 3.0 6.9 1.5 N-80X-TIR 80x 0.90 2.5 0.3 4.5 0.7 Microscope objective power is based on a 200 mm tube length. MP = 200 mm/f Note: The threads adhere to Microscope Society Standard (800-36). • Extra-long working distance • Visible and NIR versions • Infinity corrected, ideal for laser applications • Parfocal designs simplify refocusing SB Series Multi-Axis Translators page 678 UV Objective Lenses • UV fused silica lenses • Infinity corrected, ideal for laser applications • Excellent wavefront quality • High damage threshold The rear conjugate of these UV fused silica objective lenses is corrected for infinity, making them ideal for UV laser applications. Computer-optimized optical designs yield wavefront quality better than ë/5 from 350–1064 nm. Damage threshold exceeds 8 J/cm2 with 12 nsec pulses at 1064 nm. Our standard AR.10 antireflection coating is optimized for 245–440 nm. The housing has a standard microscope objective thread for easy mounting. Ordering Information Model Focal Length (mm) Numerical Aperture (NA) Working Distance (mm) Clear Aperture (mm) U-13X 11.53 0.13 6.82 3.00 U-27X 5.77 0.13 3.50 1.50 U-37X 3.41 0.11 2.42 0.75 Specifications measured at 365 nm. 100 99 98 97 250 300 350 400 450 Wavelength (nm) Transmission (%) U-37X U-27X U-13X UV transmission with AR.10 antireflection coating. U-13X ø 20.3 27.9 40.6 6.4 ø 23.9 .80-36 THD U-37X and U-27X ø 18.4 25.4 38.1 ø 23.9 .80-36 THD 6.4

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Precision Objective Lenses
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