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    Right Angle Prism

    • Introduction

    Right Angle Prism


    Right angle prisms turn light through 90° by internal reflection from the hypotenuse, or 180° from two right angle surfaces. When the light incident angle is perpendicular to the right angle surfaces, the light will be reflected at the surface of glass/air interface.


    When the input light is incident from hypotenuse surface, the light will be fully reflected in the glass / air interface at the right angle surfaces. The second total reflection occurs at next right angle surface.


    Compared to regular reflective mirrors, right angle prisms are easily to be mounted; further its reliable mechanical stress has better stability and strength. Hence right angle prisms have been considered as suitable alternatives to reflective mirrors in various applications.


    Hyperion Optics supplies a range of right angle prisms to meet UV-Visible-NIR applications, with high surface quality and tight tolerance angles.  Our materials selection ranges from BK7, Bak4, fused silica, ZnSe, CaF2 etc.



    Material tips for your application:


    • For working wavelength down to 175nm or so, with low thermal expansion requirement, Fused silica is the right choice with tighter tolerance control due to its excellent mechanical stability.
    • For visible and NIR wavelength, N-BK7 or CDGM H-K9L is suitable and cost effective.
    • For infrared wavelength, ZnSe and germanium are the right material to pick up.
    • Calcium fluoride has relatively wide transmittance range from 0.18~8um, it is the best choice when your application covers such wide transmission range.



    Hyperion Optics has full capability of processing right angle prisms based on the materials we proposed above with 3 precision levels fit your actual demand.



    Right Angle Prism

    COMMERCIAL GRADE

    FACTORY STANDARD

    PRECISION GRADE

    Dimension Tolerance(mm)

    ±0.05

    ±0.03

    ±0.0125

    Angle Tolerance

    5‘

    3’

    30"

    Cosmetic(MIL-C-13830A)

    80-50

    40-20

    10-5

    Flatness  @632.8 nm

    2 Lambda

    1/2 Lambda

    1/10 Lambda

    Coating (T% avg) VIS

    96-98%

    99%

    99.5%

    Coating (R% avg) VIS

    96-98%

    99%

    99.5%

    Materials

    BK7, Bak4, fused silica, ZnSe,Ge,CaF2


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