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Test & Measurement White Papers
Shanghai Optics Design for Manufacturing (DFM) Case Study
Shanghai Optics offers first-class Design for Manufacturing (DFM) services. We are proud of our track history helping customers improve product quality and reduce their manufacturing cost significantly. Below is one example of the optical lens we helped to optimize and re-design.
Methods of Imaging with Photoelastic Modulators
This paper highlights a range of options to utilize Photoelastic Modulators (PEMs) with imaging systems to generate full field polarimetric measurements. Due to the resonant nature of the polarization modulation, the change in polarization cannot be...
Multiphoton Imaging of Mouse Intestine
Two-photon excited fluorescence (2PEF) and second harmonic generation (SHG) are complementary multiphoton imaging techniques for studying biological samples. Both utilise femtosecond pulsed infrared excitation light to generate shorter wavelength...
Advances in Multi-Axis Motion Control for Ultra-Fast Laser Material Processing
Progress in Laser Processing stems from advances in laser technology as well as the high-performance motion control and automation system directing the beam and/or moving the parts to be processed quickly and precisely to the exact location at the...
Precision Motion and How to Achieve It
Nanoscale motion requires fastidious attention to instrumentation, passive controls, and experiment design. Most users have experience in motion control within the sphere of the microscale. In this paper we discuss what needs to be considered in the...
Diffraction Gratings - an Introduction
This paper is ideal for those wanting an introductory guide to the various types of diffraction gratings and understanding their advantages and disadvantages as well as including some useful grating equations. It discusses what impacts grating...
Power is Nothing Without "Pulse to Pulse" Laser Control
We performed a measurement on different Fast and Ultrafast laser sources with our Blink HS, a new generation of High Speed Laser Energy Sensor. We showed the “Turn on” transient effects, the “pulse to pulse” energy stability measurements and the...
How the Neo Spectroradiometer Drastically Improves Filter Quality
Admesy develops spectroradiometers, colorimeters, and light meters. They are used in large volume 24/7 production testing as well as in smaller volume niche system manufacturing. One application example where the new Neo high-end spectroradiometer...
Testing Solutions for VCSELs
The unique properties of vertical-cavity surface-emitting lasers (VCSELs) make them a workhorse for price-sensitive laser-based applications, e.g. in consumer electronics. In production, this demands mass-market-suitable, fast and highly reliable...
Cutting Edge Measurement of an Insert
The 3D optical profilometer S neox Five Axis makes it possible to quickly and flexibly obtain the key parameters necessary for the continuous improvement of our tools, such as the cutting edge radius, clearance and rake angles, or even the roughness...
Transforming XY Motion for Automated Microscopy
The SmartStage™ XY is the first of its kind high performance sample positioning stage where the motion controller, drive circuit, and encoder are ALL built-in. Eliminating multiple cables and external electronics allows for seamless integration,...
772B-MIR Laser Spectrum Analyzer
The 772B-MIR Laser Spectrum Analyzer combines proven Michelson interferometer technology with fast Fourier transform analysis to characterize the spectral properties of CW and pulsed lasers that operate from 1 to 12 µm. With CW lasers, the model...
Why We Test Lenses Over Temperature: Model Validation, Focus Hysteresis, and Other Unusual Failure Modes
Athermalization of imaging assemblies is a common challenge in optomechanical lens design. A prototype that achieves the thermal performance predicted by raytracing software is far less common. This is often due to behavior that is unforeseeable...
671 Series Laser Wavelength Meter
The 671 Series Laser Wavelength Meter uses proven Michelson interferometer-based technology to accurately measure the wavelength of CW lasers that operate from 375 nm to 12 µm. To achieve the most reliable accuracy, this system is continuously...
Nanopositioning! What is it good for?
This article explores the nuances of piezo nanopositioners, how they function, and the extent of their capability. We also examine how closed-loop feedback control can be applied to a piezo nanopositioner — significantly improving stability,...
Full-Field Hotspot Detection and High-Resolution Topographic Characterization of Post-CMP Wafers with 3D Optical Profiling
Traditional methods of post-CMP process evaluation have analytical limitations that, in light of tightening process control limits, do not meet the growing need for more accurate wafer surface characterization in semiconductor chip manufacturing....
871 Series High-Speed Laser Wavelength Meter
The 871 Laser Wavelength Meter measures wavelength at a sustained rate of 1 kHz, enabling the wavelength characterization of every single pulse for most lasers. By combining proven Fizeau etalon technology with automatic calibration, the most...
Nanopositioning and Precision Motion Control: A Step Ahead
Nanopositioning mechanisms are key to progress in fields as diverse as materials science, genomics, photonics, defense, biophysics, and semiconductors. A nanopositioning mechanism is defined as a positioning device capable of nanometer or...
Near-Field Scanning Optical Microscopes: Capabilities and Applications
NSOM techniques and instrumentation have evolved to become vital tools for material characterization, providing high-quality data and continually expanding utility, spot-on accuracy, adaptability, and exceptionally high definition. This article...
OE Products for Pharmaceutical & Medical Industries
We offer imaging components tailored for a wide variety of pharmaceutical quality control needs: standard and special lenses, lighting, cameras, controllers, and machine vision software.
Measuring and Correcting MicroLED Display Uniformity
MicroLEDs unlock next-level display performance, but inherent variability between LEDs can result in visual quality issues that impede production volumes needed for commercialization. Imaging systems have been proven for microLED test and...
771 Series High-Resolution Laser Spectrum Analyzer
Combining proven Michelson interferometer technology with fast Fourier transform analysis, the 771 Series Laser Spectrum Analyzer operates as both a high-resolution spectrum analyzer and a high-accuracy wavelength meter. With spectral resolution up...
LIDAR: A Technology Overview and the Role of Diffuse Reflectance Targets in Testing & Calibrating Advanced Driver Assistance Systems (ADAS)
LIDAR is a key enabling technology together with camera systems and other sensors in automation applications. This white paper instructs on the role of diffuse reflectance targets in testing and calibrating LIDAR systems used in consumer electronics...
Automated Solutions for SAE Standard HUD Measurement
Head-up display (HUD) technology is one of the largest growth areas in the automotive market, and standard measurement criteria are rapidly being defined to evaluate augmented projections for visual quality and safety of HUD systems. This paper...
Methods for Measuring Display Defects and Mura as Correlated to Human Visual Perception
Human vision and perception are the ultimate determinants of display quality, however human judgment is variable, making it difficult to define and apply quantitatively in research or production environments. Traditional methods for automated defect...
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April 2024
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