522 O p t i c s Phone: 1-800-222-6440 • Fax: 1-949-253-1680 TECHNICAL REFERENCE AND FUNDAMENTAL APPLICATIONS CYLINDRICAL AND SPHERICAL LENSES LENS SELECTION GUIDE SPECIALTY LENSES PRISMS MIRRORS OPTICAL SYSTEMS OPTICS SETS PinholeFreeTM Broadband Metallic Mirrors Being virtually free of pinholes, these metallic mirrors produce much lower scatter than standard metallic mirrors. They are ideal for sensitive applications requiring an economical broadband reflector. Four round sizes are available — 12.7, 19.05, 25.4, and 50.8 mm (0.5, 0.75, 1.0, and 2.0 in.) diameter. • Low scatter coating (for UV, visible, and IR), virtually free of pinholes • Broader bandwidth than dielectric coatings • Ideal for sensitive OEM applications Specifications Material Pyrex® Surface Flatness (S1) ë/5 at 632.8 nm over the clear aperture Surface Quality (S1) 15-5 scratch-dig Clear Aperture central 80% of diameter Diameter Tolerance +0/-0.13 mm Thickness Tolerance ±0.25 mm Chamfers 12.7–25.4 mm 0.25–.076 mm face width x 45° ±15° Chamfers 50.8 mm 0.38–1.14 mm face width x 45° ±15° S2 Surface Ground Coating Pinholes None visible when the mirror is illuminated from the back with a high intensity chromatic light source with 800–1200 foot candle illumination. Inspection performed in a darkened room without using magnification. Durability MIL-M-13508C Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold AL.2-PF, 100 W/cm2 CW, 5 mJ/cm2 with 10 nsec pulses at 308 nm, typical ER.1-PF, 100 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at 532 nm, typical ER.2-PF, 1000 W/cm2 CW, 1 J/cm2 with 10 nsec pulses at 1064 nm Typical 100 90 80 70 60 50 250 300 350 400 450 500550600 Wavelength (nm) Reflec tance (% ) AL.2-PF UV Enhanced Aluminum ER.1-PF Enhanced Aluminum 0° Reflectance (%) Wavelength (ìm) Typical 100 90 80 70 60 0.4 0.6 0.8 2 4 6 810 0.8 2 4 6 810 0° 0.4 0.6 ER.2-PF Protected Silver 100 90 80 70 60 Reflectance (%) Wavelength (ìm) Typical Ordering Information To order, append the coating code AL.2-PF, ER.1-PF, or ER.2-PF to the substrate number. For example, 10D20+ER.1-PF = 10D20ER.1-PF. Coatings Coating Type Wavelength Range Reflectivity Coating Code UV Enhanced Aluminum 250–600 nm Ravg >90 % AL.2-PF Enhanced Aluminum 450–700 nm Ravg >93%, Rmin >90 % ER.1-PF Protected Silver 480–1100 nm 1.1–20 ìm Ravg >96%, Rmin >93% Ravg >98.5%, Rmin >97 % ER.2-PF Round Mirrors Substrate Number Diameter (mm) Thickness (mm) 05D20 12.7 3.1 07D20 19.05 4.57 10D20 25.4 6.0 20D20 50.8 12.7 ULTIMA® Series Precision Mounts
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