Hinds Instruments, Inc. announces the PEM-ATCTM, a photoelastic modulator with advanced thermal control. This new PEM design offers long term stability and freedom from drift caused by ambient temperature variations. The PEM-ATC is equipped with a proprietary PID controller, internal heating and a temperature sensor. Through the use of heater operated PID feedback control, the…
Understanding birefringence provides a roadmap for improving the quality of optical parts. By Douglas C. Mark, Hinds Instruments, Inc. Summary: Understanding the residual stress birefringence characteristics of both individual components and bulk materials is critical for researchers, quality control professionals and factory managers responsible for products ranging from precision optics to high volume consumer devices….
Hillsboro, Oregon, November 1, 2011 – Hinds Instruments, a leading global supplier of photoelastic modulators (PEMs), Birefringence measurement systems and polarization analysis equipment, along with SCHOTT Solar Wafer GmbH announced today that they have begun a system development project to study polarization characteristic and stress birefringence in Silicon wafers and PV related materials. Hinds is…
Many things have changed since we opened our doors 40 years ago. But one thing hasn’t changed: Your need for state-of-the-art polarization measurement solutions. From the research lab to the factory floor, in applications as diverse as chiral analysis and LCD glass measurement, Hinds Instruments has solved some of the toughest problems in polarization measurement…
Do you need to measure magneto-optic effects? Are you working with magnetic thin film storage materials? Hinds Instruments provides two solutions: a component-based build-it-yourself package and a full turnkey system. Both of these are based on Hinds’ Instruments Photoelastic Modulator (PEM) technology. Hinds PEMs provide increased sensitivity for MOKE measurements. In addition, Hinds Signaloc lock-in amplifiers (LIAs) and photodiode detectors (DETs)…
NYU and Hinds collaborate to develop a Mueller matrix polarimeter for chiroptical spectroscopy of crystals. Hillsboro, Oregon, September 20, 2011 – Hinds Instruments, a leading global supplier of photoelastic modulators (PEMs), along with New York University today announced the awarding of an NSF-sponsored Grant Opportunity for Academic Liason with Industry (GOALI). The grant is entitled,…
The Signaloc 2100 Lock-In Amplifier (LIA) was originally designed for demodulation of PEM signals in Hinds’ internally developed Exicor® line of high performance birefringence measurement instrumentation. The goal was to match the sensitivity of popular commercially available lock-in amplifiers while minimizing extraneous functions to keep the cost down. The resulting Signaloc lock-in amplifier exceeded all…
Hillsboro, Oregon, September 8, 2010 – Hinds Instruments announces the release of a new generation photodiode detector family, the DET-200 series. Used in labs worldwide, Hinds’ detection systems are specifically designed for use with optical signals from DC to 1MHz over a spectral range of 200 to 1600 nm. DET-200 technology represents a significant improvement…
If the blue head to head cable (or either one of the black triax cables for systems that do not have a blue triax cable) was removed during operation of the PEM, there is a good chance that your PEM will need to be returned for repair. Follow the test procedure that is on page…
There are several possibilities. A list of questions to begin troubleshooting is: What is your optical and electronic setup? What is the light source you are using and the wavelength or wavelengths (in particular, are you using a laser)? What detector are you using? When the PEM is operating, is the limit light off, on…
The difference between these two classifications is that photoconductive detectors use the increase in electrical conductivity resulting from increases in the number of free carriers generated when photons are absorbed (generation of current), whereas photovoltaic current is generated as a result of the absorption of photons of a voltage difference across a p-n junction (generation…
Yes. The optical head itself contains no electronic components and is safe to use in an electronic field. However, depending on the strength of the field, it may be advisable for you to have longer head to head cables so that the electronic head can be sufficiently removed from the electrical field so that performance…
The cables that we provide are standard cables. However, the cables are part of the entire PEM resonant circuit. The length of any replacement cables must be precisely matched to the length of Hinds cables in order for the resonant circuit to be maintained. Hinds can provide you with replacement cables that have been designed…
Yes. If your PEM has 2 dual coax cables instead of one blue triax head to head cable, the 2 cables are interchangeable….
The electronics are not meant to be operated in a vacuum. The optical head itself contains no electronics and is safe to use in a vacuum. We can provide you with longer head to head cables so that the electronic head is not in the vacuum. Please click here to look at Hinds PEM vacuum…
No. The PEM is a resonant device, with the resonant frequency being determined by the size of the optical assembly. In spite of very tight manufacturing tolerances, each optical head is slightly different in size and this results in a slightly different frequency. The controller, electronic head, and optical head are all calibrated to work…
Based on our testing, we recommend that the magnetic field strength at the electronic head and controller be no more than 100 gauss field. We provide an MFC option for PEMs that includes an 8 ft (244 cm) head to head cable which allows removing the electronic head and controller from a magnetic field….
As the name would suggest, a PEM provides polarization modulation, that is, a changing retardation that follows a sinusoidal pattern. As such, applications that need a steady retardation level are not well suited for PEMs….
Yes, but it will require recalibration. The PEM is a resonant device, with the resonant frequency being determined by the size of the optical assembly. In spite of very tight manufacturing tolerances, each optical assembly is slightly different in size and this results in a slightly different frequency. The controller, electronic head, and optical head…
The maximum laser power is determined by the PEM optical material required for your application. If the laser is powerful enough to damage the material from which the optical assembly is made, then it cannot be used with a PEM. This is seldom a problem, however if you have a question about your particular laser,…
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