Prisms
There are four functional properties of a prism: image transposition, deviation, displacement and dispersion. JML offers a variety of different prisms for various uses and in several materials.
- Right Angle Prisms -
Engineers or designers commonly make use of a right angle prism's total internal reflection. They use the right angle prism in one of two orientations. The first is called the single mirror
or leg-hypotenuse-leg orientation. The second is called the double mirror or hypotenuse-leg-leg-hypotenuse orientation. For both orientations, incoming light must travel parallel to the plane that includes the right angle vertex.
- BK 7 Right Angle Prisms
- Fused Silica Right Angle Prisms
BK7 Penta Prisms - The penta prism deviates a beam through 90 degrees in a way that preserves the orientation of the input. Our standard penta prisms come with either second surface aluminum or second surface silver coating on the reflecting surfaces. Most people familiar with penta prisms have gained their knowledge from single lens reflex (SLR) cameras. A penta prism used in an SLR camera serves to fold the path of the viewfinder system. Another application for penta prisms can be found in laser scanning systems where a rotating penta prism is substituted for a rotating polygon mirror or holographic disc.
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BK7 Rhombic Prisms - Rhombic, rhombus and rhomboidal are synonymous when referring to a prism that works like a simple periscope. Designers specify a rhombic prism when they need to displace an optical centerline without changing its direction. This type of prism also features an image that remains in the same orientation as the object.
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BK7 Roof Prisms - The roof prism gets its name from the roof-like structure that allows the prism to invert and image in two meridians: left-right and up-down. It is also known as an Amici Prism. In its typical orientation the roof prism receives an input beam through one leg and reflects the output beam through the other leg.
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BK7 Wedges - Common names for a wedge include wedged window and thick or thin prisms. Used as a wedged window, a wedge can control the direction of back-reflected light at each surface. Applications for wedged windows, as opposed to standard plane-parallel windows, can be found in lasers and interferometers. As a thick or thin prism, a wedge can be used to disperse light into its constituent colors. Color analyzers and spectrographic instruments contain prisms or diffraction gratings to bend light of different colors into different angles for analysis.
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BK7 Corner Cube Prisms - A corner cube is, geometrically speaking, cut from the corner of a cube of glass. It has three mutually orthogonal reflecting faces and one entrance/exit face. A ray of light entering the corner cube will experience three total internal reflections. After the third reflection, the ray exits in exactly the opposite direction of the original incoming ray.
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BK7 Dove Prisms - As the dove prism is rotated about its own long axis, the orientation of its image rotates at twice the angular displacement. Thus an image can be rotated through 180 degrees by rotating the dove prism through only 90 degrees. Engineers use dove prisms to invert an image or to provide continuous control of the orientation of an inverted image.
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FEATURED NEWS
We just added over 100 new IR optical products to our web-site. Please click on IR Optics in the left side menu and check out our new mid and far IR optics. We are offering various IR multi- element lenses as well as components made of germanium, zinc selenide, sapphire and calcium fluoride feedback
