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TECH FOCUS AR/VR


SPECTROSCOPY Hübner’s laser qualifies for S&I system


S&I Spectroscopy & Imaging has qualified the C-Wave tuneable laser from Hübner Photonics for use with its TriVista spectrometer system. The combination of the C-Wave widely tunable


continuous-wave (cw) single frequency lasers (covering wavelengths from 450nm to 3.5μm) with the triple-grating spectrometer TriVista, is expected to become a new standard for resonance Raman spectroscopy and microscopy. This combination is especially suited for the challenging low-frequency Raman range <1cm-1


. ANALYSIS, TEST AND MEASUREMENT


Fresh options for ImageMaster Pro measurement systems


Trioptics has expanded the portfolio of ImageMaster Pro measurement systems with three model variants for measurement requirements that result from the latest technology trends for smartphone camera optics.


One new technology in the mobile phone


market is under-display camera technology – camera optics are almost invisibly hidden under full-screen display surfaces. High- resolution, professional photography and the zoom capability of cameras are two further key drivers for the future. All three trends cause fresh challenges for measurement technology. One of the new measurement systems –


ImageMaster Pro Display for image quality measurement of smartphone displays – will be presented to visitors at Touch Taiwan in Taipei.


The ImageMaster Pro HD has been


developed to meet the measurement requirements of new types of high-resolution smartphone optics. With 43 integrated field positions (cameras), the system enables a particularly high measurement point density. Another groundbreaking trend in the


mobile phone market is the zoom capability of cameras. Here, Trioptics relies on the ImageMaster Pro ST for highly precise measurement of the smallest fields of view using a new type of single telescope measurement technology. www.trioptics.com


The narrow linewidth and very stable emission frequency of the C-Wave, paired with its excellent spectral purity, allows recording impressive Raman spectra: the companies were able to measure low frequency Raman bands at or below 5cm-1


from the excitation wavelength, even


without filtering the excitation beam. For applications in Raman spectroscopy, most tuneable lasers require elaborate filtering to suppress unwanted amplified spontaneous emission (ASE) which can cover the weak Raman signals. Cleaning up the laser’s emission


LEDS AND ILLUMINATION


MicroCeti microLED display micromachining platform


3D-Micromac has introduced microCeti, a laser micromachining platform that supports all laser processes in microLED display manufacturing with the high throughput and precision, and low cost of ownership, needed for volume production requirements. The new platform is available in three


configurations: Lift, a laser transfer process for nearly every microLED material and shape; LLO, on-the-fly laser lift-off suitable for customer-related microLED material; and Repair, for single-die-repair process at every step of the microLED production route. The platform’s high speed enables the


transfer of hundreds of millions of microLEDs per hour, without having to apply mechanical forces, while the on-the-fly square-beam laser enables transfer of nearly any shape and size of microLED. The microCeti platform features a high-


precision UV-wavelength laser with high repetition rate and a positioning system for three stages (donor, substrate and mask) and


up to 16 axes to transfer every microLED with sub-two-micron positioning accuracy and nanometer-scale repeatability. MicroCeti supports donor wafer sizes


ranging from 50mm (2 inches) up to 200mm (8 inches), as well as intermediate/transfer wafers and backplane substrates up to 350 x 350mm. In addition to microLEDs, the microCeti platform is also suitable for standard LED and miniLED processing. www.3d-micromac.com


spectrum can be challenging, especially for the low-frequency Raman range close to the excitation wavelength. During qualification, the C-Wave revealed no detectable ASE. www.hubner-photonics.com


SOFTWARE


VPIdeviceDesigner VPIphotonics has released a software platform for the design of photonic devices. VPIdeviceDesigner is a versatile simulation


framework for the analysis and optimisation of integrated photonic devices, waveguides and optical fibres. This powerful design tool offers a set of


full-vectorial finite difference mode solvers that support widely customisable non-uniform meshing with symmetric and perfectly matched layer absorbing boundaries for simulations of guided modes in straight and bent waveguides and fibres. For simulations of photonic devices, it offers 2D and 3D implementations of the finite- difference frequency-domain beam-propagation method (BPM).


www.electrooptics.com | @electrooptics


VPIdeviceDesigner supports flexible defining of 2D waveguide cross sections and 3D device layouts made of real (dispersive, temperature-dependent, doped, etc) optical materials. It provides a user-friendly object-oriented


Python interface, which is closely integrated with the Python-based ecosystem of open- source software for mathematics, science, and engineering, including libraries Numpy and Scipy, and a comprehensive 2D plotting library Matplotlib. An advanced analysis of the simulation


results – including manipulations on the calculated elecromagnetic fields, and easy design automation with respect to any desired performance criteria – are facilitated. www.vpiphotonics.com


June 2021 Electro Optics 37


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