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PLX HOLLOW PENTA MIRROR AND PENTA ROOF ASSEMBLIES
PLX Penta Mirrors and Penta Roof Mirror Assemblies provide the performance of a penta prism with more control and wavelength transmission.
The Hollow Penta Roof Assembly is a constant deviation device developed by PLX to duplicate, with advantages, the performance of a penta prism. Unlike a solid prism that is limited in transmission through glass, the new device utilizes front surface reflectance, and thus is unlimited in wavelength transmission. By modifying the coating, polarization of the exiting beam can be precisely controlled. The device enables incoming parallel light to be deviated at 908 with great accuracy. Like the solid prism, the assembly is an invariant, and thus permits movements such as rotation without compromising either the basic 908 deviation or its inherent accuracy.
PLX Hollow Penta Roof assemblies are available in two configurations:
| TYPE A (“PM” unit) is a combination of two flat mirrors mounted at 45°. In an imaging system the unit will produce an unchanged image of an object. |
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| TYPE B (“PR” unit) is a combination of a roof mirror assembly and a flat mirror, mounted at 45°. In an imaging system, the unit turns the image at 90°, and a mirror image is displayed. |
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The optical elements of the hollow penta roof assemblies are monolithic structures made of fine annealed borosilicate glass. They are mounted in an aluminum enclosure, with a black anodized finish. Type A and Type B are each available in 1/2", 1" and 2" clear aperture, with accuracies to better than 1 arc sec. (See specifications on at left.) |
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