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Electronically Variable Optical Diffusers

Photonics.com
Nov 2012
Edmund Optics Inc.Request Info
 
BARRINGTON, N.J., Nov. 12, 2012 — Edmund Optics has released fully tunable electronically variable optical diffusers.

They use a liquid crystal film to vary the degree of optical diffusivity from near-Lambertian to clear. The diffusion angle can be continuously adjusted using a control knob. Diffusion angles (FWHM) range from 1° in the clear state to 70° in the fully diffused state. The diffusers feature a spectral range of 400 to 1500 nm, a 25-mm aperture, transmission of 85% and a response time of 10 to 20 ms. With C-mount mounting threads, they are compatible with the company’s full range of C-mount components, facilitating integration with additional optics illumination and sensors.

Designed to replace a full lab of diffusers, they are suitable for research and prototyping. During the prototype phase, the user can tune to the diffuser needed for the given application and then purchase a diffuser with those specifications for the final OEM application. They feature a simple user interface.

The devices also are suited for biophotonics research, holography and neutral density filtering, and for optically characterizing materials and preventing oversaturation of detectors.


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GLOSSARY
holography
The optical recording of the object wave formed by the resulting interference pattern of two mutually coherent component light beams. In the holographic process, a coherent beam first is split into two component beams, one of which irradiates the object, the second of which irradiates a recording medium. The diffraction or scattering of the first wave by the object forms the object wave that proceeds to and interferes with the second coherent beam, or reference wave at the medium. The resulting...
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