Near Eye Displays Test System

A new test system from Gamma Scientific (San Diego, CA) offers high spatial resolution color and contrast measurements for near eye displays (NED), such as virtual reality (VR) and augmented reality (AR) headsets, and heads up displays (HUD). The Gamma Scientific NED Measurement System incorporates compact imaging optics which feed both an integrated camera viewing system and a low-noise, high-accuracy spectroradiometer.

A LED spot projector (viewed using the camera) enables the operator to point the optics at a precise position within the display field, and selection of the appropriate aperture (using a motorized wheel) then permits measurements over fields of view ranging from 0.1° to 5°. The system's graphics generator produces test patterns and color fields to measure luminance, color, contrast, uniformity, spectral transmittance, response time (flicker), transmittance MTF, and left/right eye parallax measurements on subregions of displays as small as a single symbol.

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Fiber Optic Temperature Sensing Signal Conditioner

Micronor (Camarillo, CA) and Optocon AG (Dresden, Germany) have collaborated to create the FOTEMP1-OEM-MNT, a low-cost, small-form-factor, single-channel signal conditioner that seamlessly integrates Fiber Optic Temperature Sensing into any industrial control system, medical instrumentation, or other OEM design. The standard FOTEMP1-OEM-MNT controller features include a calibrated measurement range of −40°C to +300°C and built-in USB, RS232, and SPI interfaces.

The FOTEMP1-OEM-MNT sources the broadband light to the GaAs sensor, and an internal optical spectrum analyzer evaluates the reflected optical signal to determine the corresponding absolute temperature. This sensing and interrogation method allows for lower cost, greater accuracy (±0.2°C), widest measurement range (−200°C to +300°C), and faster response compared to other fiber optic sensor techniques, including fluorescence decay and fiber Bragg gratings.

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Camera Link to HD-SDI Converter

The CLT-371 Camera Link Translator from Vivid Engineering (Shrewsbury, MA) converts Camera Link to HD-SDI, enabling the use of Camera Link cameras with HD-SDI monitors, etc. Camera Link to HDMI and Camera Link to DVI are also supported via an inexpensive external adapter.

The CLT-371 works with most color and monochrome base-configuration cameras. Output format is either 1920 × 1080 or 1280 × 720. Features include automatic frame rate adaptation, Bayer white balance correction, camera synchronization support, and an RS-232 port for camera control. No special programming is required; configuration is enabled via rear-panel switch settings.

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High-Speed Camera

FLIR Systems (Wilsonville, OR) has announced tire X6570sc high-speed infrared camera. The longwave infrared (LWIR) X6570sc records 640 × 512 full frame video at 234 Hz (up to 14,550 Hz with windowing), with the rapid integration times needed to analyze high-speed processes or monitor fast temperature spikes. Temperature differences are distinguished down to 20 mK Connection options include Camera Link Medium and BNC, for sync and trigger with external equipment. Additionally, the X6570sc offers saved user configurations for efficient transfer between test teams.

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Line-Scan Camera

Chromasens GmbH (Konstanz, Germany/Chesterland, OH) has introduced the 3DPIXA HR (High Resolution) line-scan camera system. The device is available in two models. The 3DPIXA HR 5 μm has a larger field of view (approximately 35 mm) and a scanning speed of up to 30 kHz. The 3DPIXA HR 2 μm camera covers a 16-mm field of view. Both options enable inspection in flip chip assembly and other 3D machine vision applications, such as verification of wirebonds and printed circuit boards, and the detection of micron defects on reflective flat or cylindrical metal surfaces.

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Circular Polarizer Filter

American Polarizers, Inc. (API) (Reading, PA) has developed a new circular polarizer filter with a 50% transmission level. Whereas most circular polarizers have maximum transmission levels of around 42%, the API high-transmission circular polarizers assure that more light is transmitted through the filter to the viewer, resulting in a brighter display.

The filters are available in standard sheet sizes from 8 × 10 inches up to 18 × 24 inches, as well as custom sizes. To accommodate requests for specially shaped filters, API utilizes inhouse laser cutting and waterjet technology to fabricate circular polarizer filters in custom shapes specified by the customer. API will also provide the high-transmission circular polarizers laminated to glass or acrylic. Anti-reflection, antiglare, and conductive coatings may be specified for the acrylic and glass filters.

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