Gold Flat Mirror / TFG_TFGS

 


Gold (Au) coated reflection mirrors have high reflectance over wide infrared range.

Chromium (Cr) is used as the undercoated to better reinforce the adhesion of gold to the substrate.
Gold mirrors with silicon substrates have higher durability than glass because gold coating adheres much stronger to silicon and has a higher thermal conductivity. (thermal conductivity of silicon is 111 times better compared to glass)

 

Common Specifications

Material BK7
Hard glass (Pyrex®etc.)
Silicon crysta
Coating Cr (chrome)+Au (Gold)
Parallelism <3′
Surface Quality (Scratch-Dig) 40-20
Clear Aperture 90% of diameter or circle that internally contacts 90% square of diameter
Laser Damage Threshold 1.2kW/cm2(CW laser)

 

Schematic Outline Drawing(Circle) Outline Drawing(Square)

 

Circle
Part Number Diameter
φD
Thickness
t
Surface Flatness Material Rear Surface Quantity
(Wavelegth 632.8nm) (Convert at 10.6μm)
TFG-20C05-10 φ20mm 5mm λ/10 λ/160 BK7 Ground 1 piece
TFG-25C05-10 φ25mm 5mm λ/10 λ/160 BK7 Polished 1 piece
TFG-25C05-10-C φ25mm 5mm λ/10 λ/160 BK7 Polished 10 pieces 1 set
TFG-30C05-10 φ30mm 5mm λ/10 λ/160 BK7 Polished 1 piece
TFG-40C06-10 φ40mm 6mm λ/10 λ/160 BK7 Polished 1 piece
TFG-50C08-10 φ50mm 8mm λ/10 λ/160 BK7 Polished 1 piece

 

Square
Part Number Length
A
Thickness
t
Surface Flatness Material Rear Surface
(Wavelegth 632.8nm) (Convert at 10.6μm)
TFG-20S05-10 □20mm 5mm λ/10 λ/160 BK7 Ground
TFG-25S05-10 □25mm 5mm λ/10 λ/160 BK7 Ground
TFG-30S05-10 □30mm 5mm λ/10 λ/160 BK7 Ground
TFG-50S08-10 □50mm 8mm λ/10 λ/160 Hard glass Polished

 

Gold Silicon Mirrors
Part Number Diameter
φD
Thickness
t
Surface Flatness Material Rear Surface
(Wavelegth 632.8nm) (Convert at 10.6μm)
TFGS-30C03-2 φ30mm 3mm λ λ/16 Silicon crystal Ground
TFGS-40C04-2 φ40mm 4mm λ λ/16 Silicon crystal Ground
TFGS-50C05-2 φ50mm 5mm λ λ/16 Silicon crystal Ground
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