The quality of lens systems, mirrors and waveguides in AR headsets and VR glasses determines image quality, colour fidelity and user comfort. This is where Optocraft’s Shack-Hartmann wavefront sensors SHSLab come into play – high-precision measuring devices that detect aberrations of a few nanometres in optical systems. Their use is indispensable in the production and quality assurance of AR and VR optics, where even micro-errors can lead to visible distortions or fatigue symptoms.
Alignment of Pancake-Optiken
When adjusting pancake optics, measuring the transmitted wavefront enables fast and precise optimisation of the imaging quality. This ensures a uniformly sharp image across the entire field of view and prevents double images, which can occur even with minimal angular errors. In addition to measuring the transmitted wavefront and MTF, SHSLab also determines the refractive power of individual lenses.Light engine and wave guide
For optical components such as polarising beam splitters and prisms, which are used in light engines, for example, wavefront sensors control the phase delay and reflection properties to prevent ghost images or colour casts. Furthermore, SHSLab wavefront sensors measure the homogeneity of light propagation in waveguides and identify disturbances caused by surface defects or inhomogeneous materials. This ensures that digital content is precisely superimposed on the real world.
Cosmetic defects
The optical performance of a lens can also be impaired by cosmetic defects such as scratches, stains and drops from the hard coating process. Such defects are detected automatically using phase-shifting deflectometry. The QualiLENS 300 turnkey inspection system measures optics with diameters of up to 90 mm in an objective and non-destructive way.
Geometry
Micro-Epsilon’s confocal chromatic sensors measure geometric dimensions such as centre thickness and distance between optical elements, without contact and with maximum precision. High data rates of up to 70kHz and inclination angles >30° enable the flexible use of these sensors in a wide range of applications.
The future of AR/VR optics depends on how well we control light. Together with V-Optics and Micro-Epsilon, Optocraft offers the tools needed to perfect this control..
Our solutions for testing AR/VR optics
SHSLab wavefront sensors are used to adjust and test optical systems with nanometre precision. Evaluation rates of up to 30Hz and maximum intrinsic stability and dynamic range enable flexible use in production.
The QualiLENS 300 automatically and objectively detects cosmetic defects using phase-shifting deflectometry.
IFS confocal chromatic sensors measure thickness and distances contactlessly and with maximum precision.
