PhaseCam SWIR – Dynamic Interferometry at 1.55 µm
The PhaseCam by 4D Technology is a dynamic Twyman-Green interferometer for high-precision measurement of wavefronts and optical surfaces. The SWIR version operates at a wavelength of 1.55 µm and is particularly well-suited for testing large optical systems, telescope systems, mirrors, and optical components for the infrared spectral range.
At the heart of the system is the patented Dynamic Interferometry® Technology by 4D Technology. Unlike traditional phase-shifting interferometers, a complete measurement is performed in less than 30 microseconds recorded. As a result, vibrations, air turbulence, and other environmental factors have significantly less time to affect the measurement result.
The PhaseCam thus enables precise interferometric measurements even under conditions in which conventional interferometers would require elaborate vibration isolation or a controlled measurement environment.
Metrology of large optics and telescope systems
The combination of dynamic measurement and the SWIR wavelength makes the PhaseCam particularly well-suited for large optical systems. Typical measurement objects include telescope mirrors, concave and convex optical elements, lens systems, collimators, and complete optical assemblies.
Because of its high resistance to environmental disturbances, measurements can be performed not only in a traditional optics laboratory, but also in manufacturing environments, test benches, and on large or difficult-to-transport optical systems.
Dynamic Interferometry® – Measurement Without Conventional Phase Shifting
Conventional phase-shifting interferometers require multiple consecutive measurements. Movements between these measurements can affect the measurement results. In contrast, Dynamic Interferometry® technology captures the information needed for phase determination virtually simultaneously.
This makes it possible to analyze dynamic processes and perform highly precise measurements even in the presence of vibrations, air movements, or mechanically less stable measurement setups.
Advantages of the PhaseCam SWIR
- SWIR wavelength 1.55 µm
- Complete measurement in less than 30 µs
- Patented Dynamic Interferometry® Technology
- High resistance to vibrations and air turbulence
- Suitable for large apertures and telescope optics
- Precise wavefront and surface measurement
- Use in the optics lab as well as in manufacturing and testing environments
- Dynamic processes can be measured
- No conventional time phase shift is required
- Additional PhaseCam configurations are available for different spectral ranges
Additional wavelengths and PhaseCam configurations
In addition to the SWIR version, PhaseCam and customized interferometer systems from 4D Technology are available for other wavelengths. Depending on the measurement task, systems can be configured for the visible and infrared spectral ranges.
For applications in cleanroom environments, those involving special coatings, or for optical components whose properties are to be characterized as a function of wavelength, Soliton provides support in selecting the appropriate measurement wavelength and system configuration. Solutions for the MWIR and LWIR ranges are also available for specialized applications.
