Photopolymer Films

The National Institute for Astrophysics in Italy (INAF) is working on holographic optical elements based on volume holograms, which effectively decompose the light of stars into their colors in order to study it spectroscopically. Bayfol® HX photopolymer films, manufactured by Covestro (Leverkusen, Germany), are used for the reproducible production of highly efficient volume holograms in high-performance telescopes for different spectrometers.

Bayfol® HX films consist of a transparent carrier film on which a light-sensitive layer and an additional protective outer film are placed. In Bayfol® HX, volume holograms can be imprinted in the films in a user-friendly, purely optical manner and reproducibly, without any chemical pre-treatment or posttreatment. Periodic refractive index patterns are flexibly inscribed into the thin Bayfol® HX films using an appropriate laser exposure setup. The starlight is diffracted very efficiently at this periodic refractive index pattern, separating the starlight much more effectively into its spectral components than can be done with a prism.

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Optical Fiber For Laser Applications

OFS (Avon, CT) announced the launch of its new TrueLase Yb16/250 active and passive large mode area optical fibers for high power cutting and welding markets. The single-mode performance of the gain and passive fibers are specifically designed to meet the demand for higher power plus improved efficiency. OFS TrueLase fibers have a proprietary low- index coating for added temperature performance. These double clad fibers are used 1040 to 1200 nm range.

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UV LED Light Engine

Innovations in Optics, Inc. (Woburn, MA) offers the LumiBright™ UV-LED Light Engine Model 2990B-100 designed for UV flood curing systems to cure large parts or many small parts simultaneously. The light engine can be used alone or placed in tiled arrays to provide large area coverage. The 2990B-100 is intended for use within OEM equipment or integrated into automated assembly systems for photocuring light-curable adhesives, coatings, encapsulants, gaskets, maskants and potting compounds.

All LumiBright UV-LED Light Engines feature UV LED die arrays on MCPCB substrates manufactured with proprietary techniques that enhance thermal performance to support high current density operation. With active cooling, a single Model 2990B-100 provides an extremely uniform irradiance field of 50 mm × 50 mm with a flux density up to 500 mW/cm2. Three standard versions are available with UV LED wavelengths centered near 365 nm, 385 nm and 405 nm. Additional LED curing wavelengths of 395 nm and 435 nm are also available upon request.

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Measurement Systems

Instrument Systems (Munich, Germany) is announcing new fast, high-resolution spectrometers and systems for the measurement of VCSELs and AR/VR displays for time-of-flight and AR/VR applications. If laser diodes and VCSEL arrays are to be used for time-of-flight applications, they must be measured in terms of performance and spectral intensity, and their emissions and generated pulses characterized. For this purpose, Instrument Systems offers absolutely calibrated spectroradiometers for different wavelength ranges together with a wide range of accessories.

Widely used in the production environment is a system that couples the emitter into an integrating sphere and measures it instantaneously with the aid of photo diodes and a spectrometer of the CAS series. A fast photodiode and the emitter’s specially developed control electronics guarantee characterization of pulses in the single-digit nanosecond range and recording of the LIV curve. In addition, the single emitters of the VCSEL array can be analyzed with the aid of an absolutely calibrated camera from the LumiTop series, enabling conclusions regarding the spatial radiation properties in the near and far field.

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PrismMaster® Flex from TRIOPTICS (Rochester, NY) is a versatile goniometer for optics manufacturing. The unique vertical configuration and modular product concept make it suitable for production-related quality testing of prisms and plano optical components. The new PrismMaster® Flex goniometer provides for optimal adaptation to customers’ measurement requirements by means of three expansion stages.

The PrismMaster® Flex, with an electronic autocollimator in a swivel arm, is suitable for productive measurement of surface angles of manufactured prisms in comparison to a known reference prism. Measurement times are under one second per sample. In the PrismMaster® Flex 1D, the position information of the swivel arm is captured so that absolute surface angles and tilt angles are also measurable. In the PrismMaster® Flex 2D, the position information of the sample table is additionally captured, allowing for spatial angular relationships, wedge orientations and pyramidal angles to be measured.

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Optical Rotary Torque Sensors

Sensor Technology (Oxon, UK) recently launched the digital ORT 230/240 series of optical rotary torque sensors that provide precise, dynamic measurement of rotary and static torque of less than 100 Nm and for bandwidths of up to 50 kHz. TorqSense ORT 230 series sensors provide fixed voltage or current analogue outputs – one for torque and one for either speed or power. The TorqSense ORT 240 provides two user-selectable voltage or current analogue outputs – one for torque and the other for either speed, power or peak torque – plus digital outputs including RS232, CANbus and USB for interfacing with modern instrumentation and laptops.

The ORT 240 enables users to connect up to 10 transducers via USB, and transducer configuration software for making changes to transducer variables. Features of both devices include self-diagnostics to report if the transducer’s torque, speed ratings or calibration date have been exceeded, while inbuilt sensors monitor shaft temperature for better compensation and accuracy.

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Fiber Laser Head

FOBA's (Selmsdorf, Germany) latest innovation is a new Vector Scan laser marking head called Titus™. Being part of the new 20 Watt or 30 Watt FOBA fiber laser marking systems Y.0200-xs / Y.0300-xs, the new head is just over 20 centimeters long and weighs approximately 630 grams. Easy mounting with a clamping bracket and an optional supply line up to ten meters long is possible. Its flexibility is also based on an optional straight or inclined by 90 degrees exit angle of the laser beam and the ability to adjust the marking field size to the application requirements.

All three available user interfaces from FOBA can be used to operate the system. In addition to the user interfaces FOBA MarkUS and FOBA Draw, the new remote FOBA Go software is particularly suitable, which can be operated by any PC, touch display, tablet or other mobile device. All common industrial communication protocols are also compatible.

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