Dielectric Mirror, Laser Line, 50.8 mm, λ/10, 1520-1580 nm

The 20D20DM.8 Laser Line Dielectric mirror is a highly efficient reflector optimized for a narrow 1520 to 1580 nm wavelength range. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The DM.8 coating is designed for use with diode lasers and has a center wavelength of 1550 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
1520-1580 nm
Mirror Shape
Round
Diameter
50.8 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.8
Reflectivity
R_s, R_p>99% @ 1520-1580 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm

Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
12.7 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 10 J/cm² for 10 nsec pulses @ 1540 nm

Wavelength Region
IR
Wavelength Range
1520-1580 nm
Mirror Shape
Round
Diameter
50.8 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.8
Reflectivity
R_s, R_p>99% @ 1520-1580 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm

Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
12.7 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 10 J/cm² for 10 nsec pulses @ 1540 nm

Resources & Downloads

3D Product Models

Other

20D20DM.8 RoHS Certificate(701.9 kB, PDF)
DM.8 Raw Data.xlsx(57.3 kB, XLSX)

Related Products

Similar

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price

Compatible

Description	Compatibility
Mirror Mount, Fixed, 50.8 mm Diameter, 8-32 Thread, A-LINE	IMPERIAL	Learn More
Mirror Mount, Lab Standard, 2.0 in. Diameter, 2 Knob Actuators	UNIVERSAL	Learn More
Mirror Mount, ULTIMA<sup>®</sup>, Clear Edge, 2.0 in., 2 Locking Knobs	UNIVERSAL	Learn More

Need help?

Contact an Applications Specialist by sending us an email