Gold Mirror, Economy, Borofloat, 50.8 mm, λ/10, 650-20,000 nm

The 20D620ER.4 is an Economy Broadband Gold Mirror. By taking advantage of advanced polishing techniques and our high-volume manufacturing, these mirrors are truly cost effective. This 50.8 mm (2.0 inch) diameter mirror is made from a 12.7 mm thick Borofloat® 33 substrate which is coated with the ER.4 gold coating. Borofloat® 33 has low thermal expansion and is an excellent substrate for most applications. The ER.4 protected gold coating is ideal for applications requiring broadband reflectance in the near IR to the far IR. A multilayer dielectric overcoat provides protection to the gold from the environment. The 20D620ER.4 has an average reflectivity greater than 96% from 650–1700 nm and greater than 98% from 1.7–20 μm. This mirror has a λ/10 surface flatness and a 40-20 surface quality. This product is also available in 10-piece saving pack .

Specifications

Technical Specs

Wavelength Region
Broadband
Wavelength Range
650-20000 nm
Mirror Shape
Round
Diameter
50.8 mm
Mirror Size
Ø50.8 mm
Thickness
12.7 mm
Material
Borofloat® 33
Coating Type
Protected Gold
Coating Code
ER.4
Surface Quality
40-20 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>96%, R_min>92% @ 650-1700 nmR_avg>98%, R_min>96% @ 1.7-20 µm
Damage Threshold
0.5 J/cm², 10 ns pulses , 20 Hz at 1064 nm
Diameter Tolerance
+0/-0.13 mm
Thickness Tolerance
±0.25 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Wavelength Region
Broadband
Wavelength Range
650-20000 nm
Mirror Shape
Round
Diameter
50.8 mm
Mirror Size
Ø50.8 mm
Thickness
12.7 mm
Material
Borofloat® 33
Coating Type
Protected Gold
Coating Code
ER.4
Surface Quality
40-20 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>96%, R_min>92% @ 650-1700 nmR_avg>98%, R_min>96% @ 1.7-20 µm
Damage Threshold
0.5 J/cm², 10 ns pulses , 20 Hz at 1064 nm
Diameter Tolerance
+0/-0.13 mm
Thickness Tolerance
±0.25 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Resources & Downloads

Other

20D620ER.4 RoHS Certificate(704 kB, PDF)
ER.4 Raw Data.xlsx(223.5 kB, XLSX)

Related Products

Similar

Description	Compatibility	Avail.	Price
10Q20UF.35PTurning Mirror, Super-Broadband, Ultrafast, 25.4 mm, P Pol, 680-1060 nm	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$804
10SD520ER.4Gold Mirror, Economy, Borofloat, 25.4 mm Square, λ/10, 650-20,000 nm	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$129
13E20ER.4Elliptical Mirror, Gold, Borofloat, 33 mm x 46.7 mm, λ/10, 650-20,000 nm	UNIVERSAL	In Stock	$215
10Q20BB.2Dielectric Mirror, Ultra-broadband, 25.4 mm, 99% 0-50°, 610-1130 nm	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$493

Compatible

Description	Compatibility	Avail.	Price
U200-AC3KMirror Mount, ULTIMA^®, Center, 2.0 in., 3 Locking Knob Adjustment	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$463
M2Mirror Mount, Lab Standard, 2.0 in. Diameter, 2 Knob Actuators	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$100
U200-G2KGimbal Mirror Mount, ULTIMA^®, Center, 2.0 in., 2 Locking 100-TPI Knobs	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$428
U200-A3KMirror Mount, ULTIMA^®, Clear Edge, 2.0 in., 3 Locking Knobs	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$286