Optical Coatings

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Optical Coatings Fundamental Optics 100 typical reflectance curves 100 typical reflectance curves Material Properties Optical Specifications Gaussian Beam Optics PERCENT REFLECTANCE 80 60 40 20 0 normal incidence 45° incidence 250 300 350 400 WAVELENGTH IN NANOMETERS Figure 5.46 MAXBRIte /007 coating $ Excellent performance for excimer and YAG third- and fourth-harmonic lines, as well as broadband ultraviolet sources $ Superior reflectance from 0 to 45 degrees incidence for s- and p-polarizations $ R avg > 98% from 245 to 390 nm $ Damage threshold: see /001 (similar specifications) OPTICS GLASS CLEANING PERCENT REFLECTANCE 99 98 97 96 normal incidence 45° incidence 400 500 600 700 WAVELENGTH IN NANOMETERS Figure 5.47 MAXBRIte /009 coating $ Wavelength range extended even farther than /001 MAXBRIte $ Outstanding performance from 0 to 45 degrees incidence $ R avg > 98% from 420 to 700 nm $ Damage threshold: 0.4 J/cm 2 810%, 10-nsec pulse (35 MW/cm 2 ) at 532 nm on silica substrate Melles Griot removes all contamination from our substrates prior to coating with a high-volume, five-stage Interlab semi-aqueous glass cleaner. 5.34 1 Visit Us OnLine! www.mellesgriot.com
Laser-Line MAX-R Coatings These multilayer coatings achieve the highest possible reflectances at specific laser wavelengths and at particular angles of incidence. At these wavelengths and angles, laser-line MAX-R coatings outperform MAXBRIte . We offer coatings for angles of incidence at 0 degrees (see figure 5.48) and 45 degrees (see figure 5.49). Because the layer thicknesses differ for these two angles, the coatings cannot be used interchangeably. Laser-line MAX-R coatings are intended for external beam-manipulation applications. Specified coating reflectances apply to p-polarization (except at normal incidence, where the p- and s-polarization states are indistinguishable). Reflectances for s-polarization generally exceed those for p- polarization. Other coatings can be supplied at any center wavelength from 193 nm to 1.6 mm. APPLICATION NOTE LASER-INDUCED DAMAGE The following laser damage threshold statistics do not constitute a performance guarantee but should be representative for MAX-R coatings. /205 2.4 J/cm 2 810%, 10-nsec pulse (195 MW/cm 2 ) at 355 nm /255 13.3 J/cm 2 810%, 12-nsec pulse (920 MW/cm 2 ) at 355 nm /225 12.6 J/cm 2 810%, 10-nsec pulse (1008 MW/cm 2 ) at 532 nm /275 13.6 J/cm 2 810%, 10-nsec pulse (1088 MW/cm 2 ) at 532 nm /241 2.4 J/cm 2 810%, 20-nsec pulse (700 MW/cm 2 ) at 1064 nm /291 17.7 J/cm 2 810%, 20-nsec pulse (800 MW/cm 2 ) at 1064 nm PERCENT REFLECTANCE 100 80 60 40 20 Figure 5.48 PERCENT REFLECTANCE 100 Figure 5.49 normal incidence typical reflectance curve 0.8 0.9 1.0 1.1 1.2 RELATIVE WAVELENGTH, g = l 0 /l 80 60 40 20 MAX-R coating, normal incidence 45° incidence s-polarization p-polarization typical reflectance curves 0.8 0.9 1.0 1.1 1.2 RELATIVE WAVELENGTH, g = l 0 /l MAX-R coating, 45-degree incidence $ Highest possible reflectance achieved at specific laser wavelengths and angles of incidence $ Standard MAX-R coatings available for popular laser wavelengths at both 0 degrees and 45 degrees $ Custom designs easily produced $ Coatings available from 193 nm to 1550 nm PLEASE NOTE FOR THE ABOVE CURVES: For g = l 0 /l, l 0 is the design wavelength and l is arbitrary. For example, l = l 0 /g = 1064 nm/0.9 = 1182 nm, if one looks at g = 0.9 for the /291 coating. For values of g below 0.8 and above 1.2, the reflectance curves oscillate sinusoidally, in a manner that varies from coating to coating and run to run. Fundamental Optics Gaussian Beam Optics Optical Specifications Material Properties Optical Coatings Visit Us Online! www.mellesgriot.com 1 5.35
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Fundamental Optics 1 Introduction 1
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Paraxial Formulas SIGN CONVENTIONS
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object F 2 Figure 1.4 image Example
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Figure 1.6 Figure 1.7 f f 2 object
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Figure 1.8 Figure 1.9 INDIVIDUAL EL
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Performance Factors After paraxial
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third-order, monochromatic, spheric
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Positive lens elements usually have
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Lens Shape Aberrations described in
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ay f-numbers 2.7 3.3 4.4 6.7 13.3 S
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AIRY DISC DIAMETER = 2.44 l f/# Fig
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Lens Selection Having discussed the
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Example 4: Diffraction-Limited Perf
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Aberration Balancing To improve sys
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Definition of Terms FOCAL LENGTH (f
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infinity (which is a comfortable vi
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For symmetric lenses (r 2 = 4r 1 ),
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Separation of Nodal Point from Corr
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Gaussian Beam Optics 2 Introduction
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Even if a Gaussian TEM 00 laser-bea
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eam expander INCORPORATING M 2 INTO
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M 2 AND THE LENS EQUATION For real-
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employed when laser power must be c
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Figure 2.13 Keplerian beam expander
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Optical Specifications 3 Wavefront
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Centration The mechanical axis and
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PERFECT RECTANGULAR LENS The MDMTF
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The permissible number of maximum-s
Page 57 and 58: Material Properties 4 Material Prop
Page 59 and 60: Introduction Glass manufacturers pr
Page 61 and 62: maximum value for homogeneity withi
Page 63 and 64: Melles Griot Lens Materials Melles
Page 65 and 66: Refractive Index of Five Schott Gla
Page 67 and 68: Synthetic Fused Silica Fused silica
Page 69 and 70: PERCENT INTERNAL TRANSMITTANCE 99.9
Page 71 and 72: Low-Expansion Borosilicate Glass Th
Page 73 and 74: ZERODUR ® Many optical application
Page 75 and 76: Optical Coatings 5 Optical Coatings
Page 77 and 78: OEM and Special Coatings Melles Gri
Page 79 and 80: PERCENT REFLECTANCE 100 90 80 70 60
Page 81 and 82: will depend on the ratio of optical
Page 83 and 84: v = angle of incidence PERCENT REFL
Page 85 and 86: PERCENT REFLECTANCE PER SURFACE 2.0
Page 87 and 88: Two-Layer Coatings of Arbitrary Thi
Page 89 and 90: ION-ASSISTED BOMBARDMENT Ion-assist
Page 91 and 92: Single-Layer MgF 2 Antireflection C
Page 93 and 94: PERCENT REFLECTANCE 5 4 3 2 1 norma
Page 95 and 96: EXTENDED-RANGE HEBBAR ANTIREFLECTIO
Page 97 and 98: V-Coatings V-coatings are multilaye
Page 99 and 100: Metallic High-Reflection Coatings W
Page 101 and 102: INTERNAL SILVER (/036) $ For intern
Page 103 and 104: Dielectric High-Reflection Coatings
Page 105 and 106: PERCENT REFLECTANCE 100 80 60 40 20
Page 107: MAXBRIte Coatings MAXBRIte (multi
Page 111 and 112: Ultrafast Coating Melles Griot has
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Optical Coatings

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