Partial reflection Coating

Partial Reflection (PR) coatings provide attenuation functions and are generally applied to output mirrors of laser cavity. Our company can design the PR coating with reflectance from 10% to 99.7% to achieve the desired performance.

Wideband PR coatings are typically used at 45 degrees angle to the beam splitting of wideband light, such as 50/50,40/60,30/70 with error at around 5%.

There is a kind of super wideband PR coatings that can split beam in a wide light region from UV, visible to infrared. This coating is widely used in optical components.

Substrate Substrate
fused silica, BK7 and so on
Surface Figure
<λ/10 @ 632.8nm
Surface Quality
40-20
Chamfer
0.25mm* 45deg
Coating Material
Electron beam deposited dielectric multi-layers
Incident
0deg, 45deg
Clear Aperture
> Central 90% of diameter
 

Wavelength (nm)

Resldual Reflectance

Wavelength (nm)

Resldual Reflectance

266

50%

355

50%

650

70%

1064

10%

400-700

50%

420-680

50%

650-1050

30%

1050-1620

10%