Holographic manufacturing technique creates polarisers with sub-micron wire-grid spacing
Edmund Optics Inc (EO), a major provider of optical components and tools, based in Barrington, New Jersey, USA, has launched a range of new infrared (IR) holographic wire-grid polarisers that are manufactured using a unique holographic technique which creates a sub-micron wire-grid spacing of 2700 grooves/mm.
Compared with conventional wire-grid methods, this holographic method creates a finer groove spacing for excellent short wavelength performance, says the company.
The polarisers are available in substrates made from barium fluoride (BaF), zinc selenide (ZnSe), thallium bromoiodiode (KRS-5) and germanium (Ge).
These products are designed to polarise light from non-polarised infrared laser sources and are also ideal for attenuating light from polarised sources. When two wire-grid polarisers are used together, high extinction ratios of greater than 40 000 to 1 can be achieved.
The polarisers feature high transmission characteristics to a wavelength of 30 µm. To create a polariser/attenuator system where 360º rotation is required, they can be mounted in the company's 25.4-mm diameter or 50-mm diameter metric polariser mounts. For ease-of-use, the polarisation axis is clearly marked by two white lines that are etched into the surface of each unit's protective ring.
IR holographic wire-grid polarisers are available in a 25-mm diameter, with a clear aperture of 18 mm and a ring thickness of 5 mm, or in a 50-mm diameter with a clear aperture of 34 mm and a ring thickness of 6 mm.
Contact:
Marisa Edmund
Edmund Optics Inc
101 East Gloucester Pike
Barrington, NJ 08007
USA
Phone: +1-800-363-1992
Fax: +1-856-573-6295
Email: medmund@edmundoptics.com
Web: http://www.edmundoptics.com
Compared with conventional wire-grid methods, this holographic method creates a finer groove spacing for excellent short wavelength performance, says the company.
The polarisers are available in substrates made from barium fluoride (BaF), zinc selenide (ZnSe), thallium bromoiodiode (KRS-5) and germanium (Ge).
These products are designed to polarise light from non-polarised infrared laser sources and are also ideal for attenuating light from polarised sources. When two wire-grid polarisers are used together, high extinction ratios of greater than 40 000 to 1 can be achieved.
The polarisers feature high transmission characteristics to a wavelength of 30 µm. To create a polariser/attenuator system where 360º rotation is required, they can be mounted in the company's 25.4-mm diameter or 50-mm diameter metric polariser mounts. For ease-of-use, the polarisation axis is clearly marked by two white lines that are etched into the surface of each unit's protective ring.
IR holographic wire-grid polarisers are available in a 25-mm diameter, with a clear aperture of 18 mm and a ring thickness of 5 mm, or in a 50-mm diameter with a clear aperture of 34 mm and a ring thickness of 6 mm.
Contact:
Marisa Edmund
Edmund Optics Inc
101 East Gloucester Pike
Barrington, NJ 08007
USA
Phone: +1-800-363-1992
Fax: +1-856-573-6295
Email: medmund@edmundoptics.com
Web: http://www.edmundoptics.com
