Technical Articles

Supplier:

4D Technology Corporation


4D Technology Corporation has published these technical articles:

(Inspection Tools and Instruments)
From this Article:
In the testing of optical components and optical systems there are many requirements on the precision and accuracy, measurement time, ease of use, dynamic range, and environmental conditions.... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
Mechanical vibration and turbulent airflow present significant problems for most interferometric test methods. Conditions on the factory floor and in industrial clean rooms with high-capacity air... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
Conditions on the factory floor and in industrial cleanrooms with high-capacity air filtration systems can hamper the use of interferometry. Another problem is the testing of large-aperture mirrors... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
The technique for measuring changes in diffuse surfaces using Electronic Speckle Pattern Interferometry (ESPI) is well known. We present a new electronic speckle pattern interferometer that takes... (View Full Article)
(Calibration and Testing Services)
From this Article:
Deep Impact is a NASA Discovery Mission to impact and observe the nucleus of Comet Temple 1. The instrumentation includes a 300 mm aperture telescope that will operate at 130K once in deep space. It... (View Full Article)
(Calibration and Testing Services)
From this Article:
Interferometry is used for testing optical components and optical systems as well as the metrology of many other components, such as the flatness and roughness of hard disk drive platters and the... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
Wavefront measurement is important in the manufacture of individual optical components and for the optimization of sub-assemblies in optical data storage. The trend towards short-wavelength, high... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
An on-axis, vibration insensitive, polarization Fizeau interferometer is realized through the use of a novel pixelated mask spatial carrier phase shifting technique in conjunction with a low coherence... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
Dynamic interferometry is a standard technique for measuring optics, meter-class optics and optical systems in challenging environments. The method provides high out-of-plane resolution and... (View Full Article)
(Optical Components)
From this Article:
In recent years the demand for meter-scale optical elements has increased significantly, driven by growth in terrestrial and satellite-based astronomy, and defense and security applications. Laser... (View Full Article)
(Optical Components)
From this Article:
Determination of the spatial variations of optical phase is of primary importance in the fields of optical testing and metrology, optical recording of wavefronts, optical information processing, and... (View Full Article)
(Inspection Tools and Instruments)
From this Article:
We demonstrate a new type of spatial phase-shifting, dynamic interferometer that can acquire phase-shifted interferograms in a single camera frame. The interferometer is constructed with a pixelated... (View Full Article)

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