Elliptical Mirror, 46.7 x 66.04 mm, 1030-1090 nm Dielectric Laser Line

The 18E20DM.10 Laser Line Dielectric Elliptical Mirror is a highly efficient reflector optimized for a narrow 1030 to 1090 nm wavelength range. This 1.838 inch (46.70 mm) minor axis, 2.60 inch (66.04 mm) major axis, elliptical mirror is made from a 12.45 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The DM.10 coating is designed for use with low-power Nd:YAG lasers and has a center wavelength of 1064 nm. The coating achieves greater than 99% reflectance, from 0–45° angle of incidence, for any polarization. This multilayer dielectric coating is extremely durable, making it resistant to damage from repeated cleaning. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
IR
Wavelength Range
1030-1090 nm
Mirror Shape
Elliptical
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.10
Reflectivity
R_s,R_p>99% @ 1030-1090 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
18E20
Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter

Back Surface
Ground
Thickness
12.5 mm
Thickness Tolerance
±0.25 mm
Damage Threshold
500 W/cm² CW, 4 J/cm² for 10 nsec pulses @ 1064 nm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Minor Axis
46.70 mm
Major Axis
66.04 mm

Wavelength Region
IR
Wavelength Range
1030-1090 nm
Mirror Shape
Elliptical
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.10
Reflectivity
R_s,R_p>99% @ 1030-1090 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
18E20
Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter

Back Surface
Ground
Thickness
12.5 mm
Thickness Tolerance
±0.25 mm
Damage Threshold
500 W/cm² CW, 4 J/cm² for 10 nsec pulses @ 1064 nm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Minor Axis
46.70 mm
Major Axis
66.04 mm

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