TFM/TFM2 Laser Line Mirrors
- Laser Line Mirrors are total reflection mirrors multilayer-coated with dielectrics of different refractive index by turns on.
- Dielectric multilayer coating does not have absorption like AL and the reflectance can be more than 99% except some mirrors for UV wavelength.
- These coatings are much stronger than Al+MgF2 coating against high-power lasers.
- The wavelength (range) of reflectance depends on incident angles.
- Three types of laser line mirrors are offered.
- [Narrow Band] Laser line mirrors that are focused on specific wavelengths. Incident angle is 45°.
- [Middle Band] Multi line mirrors with middle reflection bands. Incident angle is 45°.
- [Broad Band] Multi line mirrors with broad reflection bands. Incident angle is 45°.
- The coated surface of the mirror that rear surface is polished is indicated with an arrow on the side of substrate.
- Reflectance of laser line mirrors are different according to the polarization of input beams. S-polarization has the high reflectance and the wide reflective bandwidth compared with p-polarization. The reflectance in the specifications list is that of random polarization or (p-polarization reflectance + s-polarization reflectance) / 2.
- The reflectance curves are based on actual measurements and may be different with production lots.
- Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
- The surface flatness is the reflected wavefront distortion of the surface befor coating.
|Material||BK7, CaF2 for Ultraviolet|
|Coating||Dielectric multilayer coating|
|Measurement of surface flatness||The substrate is measured with Zygo laser interferometer system.|
|Wavelength of surface flatness measurement||632.8nm|
|Surface flatness||λ/10, P(CFU)|
|Clear aperture||90% of actual aperture|