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MICRO-CONTROLE / Spectra-Physics
Laser Line Dielectric Mirrors

Laser Line Dielectric Mirrors

Product catalog summary

Laser Line Dielectric Mirrors
These mirrors are designed for high efficiency reflectivity within a narrow wavelength range, achieving over 99% reflectance for any polarization at angles of incidence from 0 to 45 degrees. They are available in diameters ranging from 12.7 mm to 203.2 mm and in two elliptical sizes. The mirrors are suitable for various laser types including HeCd, Argon-Ion, HeNe, Nd:YAG, and diode lasers.

Specifications

Diameter Tolerance: Varies by size, with tolerances from +0/-0.13 mm to +0/-0.25 mm.
Thickness Tolerance: ±0.25 mm to ±0.38 mm depending on size.
Clear Aperture: At least 80% of the diameter.
Chamfers: Specified face width and angle tolerances.
Durability: Complies with MIL-C-675C standards.
Cleaning: Non-abrasive methods recommended.
Damage Threshold: Varies by coating, with typical thresholds specified for continuous wave and pulsed lasers.

Ordering Information
To order, append the coating code to the substrate number. For example, 10D20+DM.5 becomes 10D20DM.5. For specific coatings like DM.7, contact the supplier.

Coatings and Reflectivity

HeCd: 325 nm and 441.6 nm with Rs, Rp >99% reflectivity.
Argon-Ion: 488-514.5 nm with Rs, Rp >99% reflectivity.
Nd:YAG: 532 nm and 1064 nm with Rs, Rp >99% reflectivity.
HeNe: 632.8 nm with Rs, Rp >99% reflectivity.
Diode: 1300 nm and 1550 nm with Rs, Rp >99% reflectivity.

Round and Elliptical Mirrors
Various substrate numbers are available with specific diameter, thickness, material, surface flatness, and surface quality specifications. Materials include Pyrex® and Zerodur®, with surface flatness ranging from λ/2 to λ/20 and surface quality from 40-20 to 10-2.

Conclusion
This document provides detailed specifications and ordering information for laser line dielectric mirrors, emphasizing their high reflectivity and durability for various laser applications.

Catalog excerpts

526 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 Laser Line Dielectric Mirrors These mirrors are highly efficient reflectors optimized for a narrow wavelength range. We offer eight standard dielectric coatings for HeCd, Argon-Ion, HeNe, low-power Nd:YAG, and diode lasers. Each achieves greater than 99% reflectance, from 0–45° angle of incidence, for any polarization. These mirrors are available in sizes from 12.7–203.2 mm (0.5–8.0 in.) diameters and in two elliptical sizes. 1.44 0.96 0.48 0.00 -0.48 -0.96 -1.44 Surface Microroughness (nm) Distance on Surface in Microns (20.2x) 0 131 262 393 523 654 Typical Mirror Surface Profile RMS: 0.337 nm RA: 0.274 nm PV: 1.90 nm • High efficiency narrowband reflectivity • Rs, Rp >99% at a laser line • Over 35 types of substrates and 8 coatings to choose from Specifications Diameter Tolerance [in. (mm)] 0.5 (12.7)–4.0 (101.6) +0/-0.13 mm 6.0 (152.4) & 8.0 (203.2) +0/-0.25 mm Elliptical Minor Axis +0/-0.18 mm Elliptical Major Axis +0/-0.25 mm Thickness Tolerance [in. (mm)] 0.5 (12.7)–4.0 (101.6) ±0.25 mm 6.0 (152.4) & 8.0 (203.2) ±0.38 mm Elliptical ±0.25 mm Clear Aperture central 80% of diameter Chamfers [in. (mm)] 0.5 (12.7) & 1.0 (25.4) 0.25–0.76 mm face width x 45° ±15° 1.181 (30.0)–4.0 (101.6) 0.38–1.14 mm face width x 45° ±15° 6.0 (152.4) & 8.0 (203.2) 0.51–1.52 mm face width x 45° ±15° Elliptical 0.38–1.14 mm face width x 45° ±15° S2 Surface Ground Durability MIL-C-675C Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold RM.2, 1000 W/cm2 CW, 2 J/cm2 with 10 nsec pulses at 325 nm, typical DM.8, DM.10 & DM.11, 500 W/cm2 CW, 2 J/cm2 with 10 nsec pulses within the wavelength range, typical All others, 500 W/cm2 CW, 1 J/cm2 with 10 nsec pulses within the wavelength range, typical Ordering Information To order, append the coating code RM.2, DM.6, DM.5, DM.11, DM.4, DM.10, or DM.8 to the substrate number. For example, 10D20+DM.5 = 10D20DM.5. (Note: For DM.7 coating, please call us.) Coatings Laser Type Center Wavelength (nm) Wavelength Range (nm) Reflectivity Angle of Incidence Coating Code HeCd 325 325 Rs, Rp >99% 0–45° RM.2 HeCd 441.6 441.6 Rs, Rp >99% 0–45° DM.6 Argon-Ion 488/514.5 488–514.5 Rs, Rp >99% 0–45° DM.5 Nd:YAG 532 532 Rs, Rp >99% 0–45° DM.11 HeNe 632.8 632.8 Rs, Rp >99% 0–45° DM.4 Nd:YAG 1064 1030–1090 Rs, Rp >99% 0–45° DM.10 Diode 1300 1290–1350 Rs, Rp >99% 0–45° DM.7 Diode 1550 1520–1580 Rs, Rp >99% 0–45° DM.8 45° P 45° S 0° RM.2 325 nm 100 95 90 85 80 0.2 0.3 0.4 0.5 0.6 Reflectance (%) Typical 45° P 45° S 0° DM.6 441.6 nm 100 95 90 85 80 0.4 0.5 0.6 0.7 0.8 Reflectance (%) Wavelength (ìm) Typical Precision Beam Steerers page 692

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