4D Technology

Optical Metrology for Large Space and Terrestrial Telescope Optics

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Measurement of large optics require metrology systems that can function despite vibration, turbulence and other challenges.Laser interferometry is used throughout the manufacturing of large optics to ensure conformance to demanding design specificationsMore recently, “dynamic interferometry” has been implemented for vibration-insensitive measurement of large optics.

Measure for measure

Keely Portway looks at some of the latest advances in light-based test and measurement techniques

Up to scratch?

Verifying the surface quality of optics has long relied on a visual, non-quantitative approach, finds Jessica Rowbury

4D InSpec Surface Gauge

4D Technology has announced the 4D InSpec Surface Gauge, the first handheld, non-contact instrument that measures precision machined surface defects and features with micrometer-level resolution

AccuFiz Fizeau

4D Technology Corporation, manufacturer of optical metrology systems, has introduced its newly improved AccuFiz compact laser interferometer for accurate, repeatable measurement of surface shape and transmitted wavefront quality

FlexCam

4D Technology Corporation, manufacturer of optical metrology systems, has introduced the FlexCam metrology module

AccuFiz laser interferometer

4D Technology Corporation, manufacturer of optical metrology systems, has introduced its newly improved AccuFiz compact laser interferometer for accurate, repeatable measurement of surface shape and transmitted wavefront quality

1,064nm PhaseCam 6000

4D Technology has introduced the 1,064nm PhaseCam 6000 for measuring near-infrared optics and optical systems, which has boasts an easy to position, fibre-coupled measurement head and motorised control

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