RMI Penta Prisms - BK7-UVFS-FS
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since 2015
Description
Penta Prisms are a unique optical component designed to deviate a beam by 90º without inverting or reversing the image. This makes them an essential tool in various optical applications where maintaining the orientation of the image is crucial. The constant deviation property of penta prisms ensures that the 90º deviation angle is consistent for all rays passing through the effective aperture, regardless of their angle concerning the optical axis. This feature is particularly beneficial in scenarios where precise control over prism orientation is challenging.
Due to the specific geometry of penta prisms, the reflecting surfaces do not rely on total internal reflection. Instead, they require a coating, either metal or dielectric, to achieve the desired reflective properties. This necessity for coatings underscores the importance of precision in manufacturing and the expertise required to produce high-quality penta prisms. The coatings ensure that the prisms perform optimally under various conditions, enhancing their versatility and reliability in demanding optical systems.
At Rocky Mountain Instrument Co., we pride ourselves on our collaborative approach to working with clients. By engaging with customers early in the development process, we help transition prototype concepts into efficient, manufacturable solutions. Our commitment to solving even the most technically challenging requirements is reflected in the quality and performance of our optical components, including our expertly crafted penta prisms.
RMI Penta Prisms - BK7-UVFS-FS
Specifications |
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|---|---|
| Material: | BK7, FS, UVFS |
| Mounting: | Unmounted |
| Dimensions: | Custom |
| Surface Figure: | Lambda/20 @ 633nm |
| Surface Quality: | 10-5 Scratch-Dig |
Features
- 90º Beam Deviation: Penta Prisms deviate a beam by 90º without inverting or reversing the image, making them ideal for applications where prism orientation cannot be precisely controlled.
- Constant Deviation: The 90º deviation angle applies to all rays transmitted by the effective aperture, regardless of their angle with respect to the optical axis.
- Material Options: Available in high-quality materials such as BK7, UVFS, FS, and CaF2 to suit various optical applications.
- Surface Figure: All polished surfaces of BK7, UVFS, and FS have a surface figure of λ/20 at 633 nm, while CaF2 surfaces have a λ/4 at 633 nm.
- Surface Quality: High precision with surface quality of 10-5 for BK7, UVFS, FS, and 20-10 for CaF2.
- Dimensional Precision: Penta Prisms have dimensions A=B=C with a dimensional tolerance of +0.000", –0.010".
- Angular Deviation: Ensures precision with an angular deviation of ≤ 3 arc minutes.
- Bevels: Designed with bevels ranging from 0.010" to 0.030" at 45º for added robustness.
- Clear Aperture: Exceeds central 85% of diameter, ensuring optimal light transmission.
- Custom Coatings: Reflecting surfaces are coated with metal or dielectric coatings due to non-utilization of total internal reflection.
Applications
- Surveying Instruments: Penta prisms are used in surveying instruments to help in accurate measurement by deviating a beam by 90º without inverting or reversing the image.
- Optical Alignment: They are ideal for optical alignment applications where precise control over prism orientation is difficult.
- Rangefinding Equipment: Penta prisms are used in rangefinding devices to ensure accurate distance measurements.
- Photography and Imaging: In cameras and other imaging equipment, penta prisms help in viewfinder systems to correctly orient the image.
- Laser Systems: Penta prisms are used in laser systems to redirect beams with high precision.
- Architectural and Construction Tools: Used in tools for aligning and leveling in construction and architecture.
- Scientific Research: Utilized in various scientific instruments and experiments requiring precise beam deviation.
- Telecommunications: Employed in optical communication systems for beam routing.
Frequently Asked Questions
The standard specifications of the Penta Prisms include materials such as BK7, UVFS, FS, CaF2, surface figure, surface quality, dimensional tolerance, angular deviation, and clear aperture.
The property of constant deviation means that the 90º deviation angle applies to all rays transmitted by the effective aperture, regardless of their angle with respect to the optical axis.
Due to the geometry of penta prisms, the reflecting surfaces due not utilize total internal reflection and must be coated with a metal or dielectric coating.
Penta prisms are very useful in applications where prism orientation cannot be precisely controlled.
Penta Prisms deviate a beam by 90º without inverting or reversing the image.