OCT Mirrors
Overview
As OPTOMAN is playing a protagonist role for laser system developers, the beam delivery setup in machines designed for micro drilling, micro structuring, micro shaping, and laser processing in general, motivated OPTOMAN to optimize Ion Beam Sputtering coatings for laser processing applications.
Key Problems
OPTOMAN has fought many battles. From the experience gathered throughout these years, he highlighted main problems laser processing faces.
Short duty cycle and lifetime of machines caused by coating absorption and laser damage.
Beam profile deformation.
Polarization sensitivity requires beam delivery components to be optimized for s and p at the same time.
Multiple wavelengths coverage in the system.
What can OPTOMAN do for the laser processing market?
Lower cost of ownership due to enhanced lifetime.
OPTOMAN’s concentration on high LIDT and enhanced lifetime IBS coatings allows industrial players to forget about headaches when components have to be replaced after a short period of time. Learn more about this here.
Laser optics made by OPTOMAN, due to low absorption, low surface roughness and high batch-to-batch repeatability, offer higher longevity than optics produced by others, thus lowering the Total Cost of Ownership and ensuring the cost of supply wouldn’t be just the tip of the iceberg when purchasing optics.
OCT Mirrors for Laser Processing applications
OCT (Optical Coherence Tomography) is an imaging technique used in laser processing applications to capture high-resolution images of desired materials. OCT relies on the interference of electromagnetic waves to generate the images.
There are various types of mirrors used in OCT setups, but all of them need to possess High Reflectivity, Low Absorption, Multiwavelength Performance, Extraordinary Flatness and High Laser-Induced Damage Threshold (LIDT), which is quite the challenge for coaters.
Does OPTOMAN solve the challenges?
Of course, have a look:
High Reflectance
In some instances, reflection values of as high as 99.99% and 99.95% for s and p polarizations respectively can be reached.
Low Absorption
In some mirrors, absorption loss can be lowered down to <1 ppm per coated surface.
Multiwavelength Performance
OPTOMAN can manufacture mirrors with multiple wavelengths coverage (for eg. HR/AR @ 1030, 515 nm at the same time).
Extraordinary Flatness
Some Laser Optics from OPTOMAN, depending on application, are super-polished, which allows for Extreme Low-Loss coatings. Typical values of Surface Flatness go down to <λ/10 @ 633 nm per CA.
High LIDT
OPTOMAN thrives on achieving the highest LIDT possible. That's why such coatings were feasible:
> 1.183 J/cm2 @ 1030 nm, 507 fs, 1 kHz, 136.5 μm
> 426 kW/cm @ 1070 nm, 30 s, 137.6 μm (where 426 kW was the power limit of the laser)
Wide range of Wavelengths
OCT systems usually use wavelengths from VIS to the Mid-IR range, depending on applications. OPTOMAN uses advanced techniques to fulfill the necessary requirements in any band configuration.
Custom - Custom shape, curvature and size.
- Spectral range 193 nm - 5000 nm.
- Size range from 3 mm up to 360 mm.
- Optimization for 2, 3, 4 or more wavelengths.
- Various angles of incidence.