• 45 Thin Film Polarizer

    45 Thin Film Polarizer

    Dayoptics has newly developed thin film polarizer based on 45deg. Incidence. We can assure high transmittion >95% and high reflection >99%. Ask Dayoptics’ sales for whatever you need.

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  • High Transmission Polarizer

    High Transmission Polarizer

    High Transmission Glan Laser Polarizers(PGH)is a special type of Glan Laser Polarizers.The incidence angle of the PGH is brewster angle cut which can great improve the transmission ray up to 98% in wide range of wavelength without coating.The polarizer can be made from Calcite and YVO4 crystals.In order to get transmission of wide range of wavelength,the polarizers are not recommended to use for large acceptance angle.Typically used is within+/-5°

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  • Brewster Angle Thin Film Polarizer

    Brewster Angle Thin Film Polarizer

    Dayoptics thin film polarizer based on a coating made up of particular birefringent materials having polarizer properties while the coating is designed under Brewster angle. Brewster Angle :For light incident on a plane boundary between two regions having different refractive indices,the angle of incidence at which the reflectance is zero for light that has its electrical field vector in the plane defined by the direction of propagation and the normal to the surface.For propagation from medium 1to medium 2,Brewster’s angle is given as arctan (n2/n1)

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  • Glan Thompson Polarizer Beamsplitter Cube

    Glan Thompson Polarizer Beamsplitter Cube

    Glan Thompson polarizer Beamsplitter Cube is made of two Calcite prisms or two a-BBO prisms cemented together .It have high extinction ratio below 5×10-5 is botained. The Calcite type can be used in the range of 350-2300nm,and a-BBO crystal usable in the range of 220-900nm. It can separate the nature light for O polarized light and E polarized light,and the separate angle is 45°. Since there are two ports,the prism can also be used by replacing the input and output direction.

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  • Rochon Polarizer

    Rochon Polarizer

    Rochon polarizer is one of the earliest designs ,which is made of two Birefringent material prisms cemented or optical contacted together .Both ordinary and extraordinary beams propagate collinearly down the optic axis in the first prism under the ordinary refractive index,Upon entering the second prism the ordinary beam,however ,now has a lower refractive index and is refracted at the interface.Any separation angle can be for designed for specific wavelength upon requirement.

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  • Wollaston Polarizer

    Wollaston Polarizer

    Wollaston polarizer is made of two birefringent material prisms that are cemented together .The deviations of the ordinary and extraordinary beams symmetrical about the input beam axis.so that the Wollaston polarizing beam splitter has approximately twice the deviation of the Rochon.The separation angle exhibits chromatic dispersion, as shown in the plot blow.Any separation angle can be designed upon requirement .The separation angle of standard products vs wavelength is shown in the plot below.

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  • Glan Thompson Polarizer

    Glan Thompson Polarizer

    Glan Thompson polarizer is made of two calcite prisms or two a-BBO prisms cemented together . Two types of Glan Thompsons are available .One is the standard form and the other is the long form.Their length to aperture ratios 2.5:1 and 3.0:1 respectively.Glan Thompson polarizers tend to have higher extinction ratio than air spaced polarizers .In the ultra violet spectrum,their transmission is limited by absorption in birefriengent materials as well as the cement layer.a-BBO polarizers and Calcite polarizers can be used from about 220 to 900nm and 350 to 2300nm respectively.

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  • High Power Glan Laser Polarizer

    High Power Glan Laser Polarizer

    Glan Laser polarizer is made of two same birefringent material prisms that are assembled with an air space.The polarizer is a modification of the Glan Taylor type and is designed to have less reflection loss at the prism junction.The polarizer with two escape windows allows the rejected beam to escape out of the polarizer,which makes it more desirable for high energy lasers.The surface quality of these faces is relatively poor compare to that of entrance and exit faces .No scratch and dig surface quality specifications are assigned to these faces.The polarizer field F1 and F2 of these is shown in the plot below.

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  • Glan Taylor Polarizer

    Glan Taylor Polarizer

    Glan Taylor polarizer is made of two same birefringent material prisms that are assembled with an air space.Its length to aperture ratio which is less than 1.0 makes it a relatively thin polarizer.The polarizer with no side escape windows is suitable for low to medium power application where the side rejected beams are not required .The angular field of different materials of polarizers is listed below for comparison.

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Polarizer Beam Splitter Optical Window Laser Mirror Optical Crystal Birefringent Crystal