OEM Automatic stocks and supplies a large range of Basler lenses, focal length extenders, adapters, macro reversing rings and extension tubes are also available to compliment the lens range. Basler offers premium and standard lenses, suitable for different vision applications to deal with the demand placed on the optics. Achieving the best price-performance ratio for various applications.

Achromatic Quarter-Wave plate

Half Waveplate The thickness of a half waveplate is such that the phase difference is 1/2-wavelength (true-zero order) or some multiple of 1/2-wavelength (multiple order). A linearly polarized beam incident on a half waveplate emerges as a linearly polarized beam but rotates such that its angle to the optical axis is twice that of the incident beam. Therefore, half waveplates can be used as continuously adjustable polarization rotators. Half waveplates are used in rotating the plane of polarization, electro-optic modulation and as a variable ratio beamsplitter when used in conjunction with a polarization cube.

Quarter Waveplate The thickness of the quarter waveplate is such that the phase difference is 1/4 wavelength (true-zero order) or some multiple of 1/4 wavelength (multiple order). If the angle θ (between the electric field vector of the incident linearly polarized beam and the retarder principal plane) of the quarter waveplate is 45o, the emergent beam is circularly polarized. When a quarter waveplate is double passed, i.e. by mirror reflection, it acts as a half waveplate and rotates the plane of polarization to a certain angle. Quarter waveplates are used in creating circular polarization from linear or linear polarization from circular, ellipsometry, optical pumping, suppressing unwanted reflection and optical isolation.

Thorlabswaveplate

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Half wave plate

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quarter-wave plate

Waveplates (retardation plates or phase shifters) are made from materials which exhibit birefringence. The velocities of the extraordinary and ordinary rays through the birefringent materials vary inversely with their refractive indices. The difference in velocities gives rise to a phase difference when the two beams recombine. In the case of an incident linearly polarized beam this is given by α=2*π*d(ne-no)/λ  (α - phase difference; d - thickness of waveplate; ne, no - refractive indices of extraordinary and ordinary rays respectively; λ-wavelength). At any specific wavelength the phase difference is governed by the thickness of the waveplate.

Basler frame grabber cards are designed for high speed applications, with their high-quality image pre-processing features, reducing the CPU load to close to zero. The processing core consists of FPGA processors, which are highly synchronised data processing for high bandwidths.

OEM Automatic Ltd Whiteacres, Whetstone Leicester, LE8 6ZG Company Registration No. 2240242, VAT No. 487 5621 07 Tel: 0116 284 9900 [email protected] Request a video meeting Sign-up to our email marketing Qnister - Whistleblowing system

Basler supply cameras that provide 2D images in mono and colour and the innovative Time of Flight, 3D camera. The range includes GigE, USB , CoaXpress, CameraLink & Bcon (LVDS & MIPI) interfaces, resolutions from VGA to 24MP, rolling and global shutters and monochrome or colour options.