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  • PhaseCam 6000 Interferometer
Feb 2010
4D Technology CorporationRequest Info
TUCSON, Ariz., Feb. 16, 2010 – The PhaseCam 6000 manufactured by 4D Technology Corp. is a compact and lightweight Twyman-Green interferometer for measurement of optics and optical systems. With an easy-to-position, fiber-coupled measurement head and motorized controls, it is suitable for on-machine metrology, remote mounting in measurement towers or pressure vessels, and other challenging applications and environments, and it provides wavefront and shape measurement of general optics, large optics and optical systems.

The turnkey system uses Dynamic Interferometry to acquire all measurement information in a single exposure, more than 5000 times faster than a conventional, phase-shifting interferometer, according to the company. The high-speed optical phase sensor makes wavefront measurements in 30 µs. This near-instantaneous measurement speed makes the instrument insensitive to vibration and air turbulence, enabling measurement in noisy environments such as cleanrooms and manufacturing facilities. Its immunity to air turbulence enables accurate measurement of long radius-of-curvature optics, where the instrument may be located tens of meters from the test optic.

Included is a 1000 × 1000-pixel camera, a computer system and 4Sight analysis software that provides extensive 2-D, 3-D, Seidel, geometric, diffraction and Zernike analysis options, as well as data filtering, masking, database and import/export functions. The stabilized HeNe 632.8-nm laser provides good coherence stability.

Applications include in situ process control, quality verification of optical components, vacuum and environmental chamber testing, focal optical systems, optical testing of moving parts, and measurement of large, focal optical systems such as concave telescope mirrors and lens systems, as well as deformable mirrors and adaptive optics. Numerous accessories and options are available including a five-axis mount, low-reflectivity diverging lenses, beam expanders and wavelength options. 


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adaptive optics
Optical components or assemblies whose performance is monitored and controlled so as to compensate for aberrations, static or dynamic perturbations such as thermal, mechanical and acoustical disturbances, or to adapt to changing conditions, needs or missions. The most familiar example is the "rubber mirror,'' whose surface shape, and thus reflective qualities, can be controlled by electromechanical means. See also active optics; phase conjugation.
A light-tight box that receives light from an object or scene and focuses it to form an image on a light-sensitive material or a detector. The camera generally contains a lens of variable aperture and a shutter of variable speed to precisely control the exposure. In an electronic imaging system, the camera does not use chemical means to store the image, but takes advantage of the sensitivity of various detectors to different bands of the electromagnetic spectrum. These sensors are transducers...
Describing a hollow curved surface; curved inward.
An instrument that employs the interference of lightwaves to measure the accuracy of optical surfaces; it can measure a length in terms of the length of a wave of light by using interference phenomena based on the wave characteristics of light. Interferometers are used extensively for testing optical elements during manufacture. Typical designs include the Michelson, Twyman-Green and Fizeau interferometers. The basic interferometer components are a light source, a beamsplitter, a reference...
An afocal optical device made up of lenses or mirrors, usually with a magnification greater than unity, that renders distant objects more distinct, by enlarging their images on the retina.
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