While not an item of test equipment per se, MicroOptical's Model SV-3 Instrument Viewer is being billed as a test-and-measurement adjunct. As MicroOptical says in its press statement, engineering folks sometimes work in inconvenient places. Although color head-mounted VGA displays have been around for quite some years, I don't recall any company slating them specifically for test equipment such as oscilloscopes.
Good marketing aside, MicroOptical's SV-3 is small enough to clip onto eyeglass or safety goggle frames to depict a scope's waveform or any other aspect of an instrument's display that's fed to an external VGA jack. In fact, the company ships the viewer in a kit that includes a pair of ANSI Z-87.1 spec'd safety glasses.
Weighing in at just a tad over 1.2 oz. (35 g), the SV-3 virtual display can provide six to eight hours of continuous operation, powered by a 2-cell rechargeable 7.2 V Li-ion battery. An optional battery can extend the unit's run time.
Configurable for either eye, the Instrument Viewer proves a 6-bit (64-color) 640 × 480 pixel image, refreshing at a 60 Hz rate. The field of view is about 16 degrees in the horizontal plane, and about 19 degrees on the diagonal. That's roughly the equivalent of having an 8" CRT about two or three feet in front of your eyes.
As Mark Spitzer, the company's CEO points out, 64 colors are really all that most users need when working with test equipment. "16 million colors is overkill for most test applications," says Spitzer. "As such, that keeps the cost of the SV-3 relatively low. It also keeps dissipation down."
Spitzer also told me that the SV-3 uses a transmissive 3/8" LCD to generate its images. The LCD works in conjunction with an LED that shines through it, and the SV-3's optics are attached directly to the LCD.
MicroOptical also offers a variety of other virtual display products. Its ¼ VGA virtual display, dubbed the Model CV-1 Video Viewer, is priced at $1650. It provides a 320 × 240 pixel image, and also attaches to a pair of eyeglasses. The CV-1 accepts NTSC or (optionally) PAL video.
Kopin In Sight
Although the company's press statement doesn't say so, MicroOptical's Instrument Viewer is based on Kopin Corp.'s transmissive active matrix LCD (AMLCD) technology. Kopin has been making special transmissive LCDs for quite a few years. Its systems produce clear and seemingly large images when viewed through the right optics.
Kopin's patented technology actually transfers or "floats" its CMOS circuits onto clear glass substrates and, significantly, the company's wafers are processed on standard CMOS-foundry fab lines. The displays also integrate some electronics on-chip, a move that simplifies interfacing.
For more details about the SV-3, contact Spitzer at
For more information from Kopin Corp., contact the company at