Dielectric Mirror, Laser Line, 30.0 mm, λ/10, 632.8 nm

Borofloat 33 Laser Line Dielectric Mirrors

The 3MD20DM.4 Laser Line Dielectric mirror is a highly efficient reflector optimized for the 632.8 nm wavelength. This 1.181 inch (30.0 mm) diameter mirror is made from a 6.0 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The DM.4 coating is designed for use with HeNe lasers and has a center wavelength of 632.8 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
VIS
Wavelength Range
632.8 nm
Mirror Shape
Round
Diameter
30.0 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.4
Reflectivity
R_s, R_p>99% @ 632.8 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
3MD20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
6.0 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, 5 J/cm² for 10 nsec pulses @ 694 nm

Wavelength Region
VIS
Wavelength Range
632.8 nm
Mirror Shape
Round
Diameter
30.0 mm
Material
Borofloat® 33
Coating Type
Laser Line Dielectric
Coating Code
DM.4
Reflectivity
R_s, R_p>99% @ 632.8 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
3MD20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
6.0 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, 5 J/cm² for 10 nsec pulses @ 694 nm

Resources & Downloads

Other

3MD20DM.4 RoHS Certificate(704.1 kB, PDF)
DM.4 Raw Data.xlsx(54.4 kB, XLSX)

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Compatible

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Frequently Purchased Together

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		3MD20DM.4Dielectric Mirror, Laser Line, 30.0 mm, λ/10, 632.8 nm	UNIVERSAL			$180