RMI Penta Prisms - CaF2
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since 2015
Description
Penta Prisms are an essential optical component designed to deviate a light beam by 90 degrees without inverting or reversing the image. This unique property makes them highly advantageous in applications where maintaining the orientation of the image is crucial, yet precise control over the prism's orientation is not feasible. The constant deviation characteristic of penta prisms ensures that the 90-degree deviation angle is preserved for all rays passing through the effective aperture, regardless of their angle relative to the optical axis.
Due to the specific geometry of penta prisms, the reflecting surfaces do not rely on total internal reflection. Instead, these surfaces require a specialized coating, either metal or dielectric, to achieve the desired reflective properties. This necessity for coating further enhances the versatility and applicability of penta prisms across a wide range of optical systems.
At Rocky Mountain Instrument Co. (RMI), our commitment to quality and precision is evident in our standard specifications for penta prisms. We offer a selection of materials including BK7, UVFS, FS, and CaF2, each chosen for its superior optical properties. Our meticulous manufacturing process ensures that all polished surfaces meet stringent surface figure and quality standards, providing exceptional performance in demanding optical environments.
RMI's dedication to excellence extends beyond the product itself; we engage collaboratively with our clients from the initial stages of development. Our goal is to transform innovative prototype concepts into efficient, manufacturable solutions that meet even the most technically challenging requirements. This customer-centric approach is the foundation of our service philosophy, ensuring that we deliver optical components that not only meet but exceed expectations.
RMI Penta Prisms - CaF2
Specifications |
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|---|---|
| Material: | CaF2 |
| Mounting: | Unmounted |
| Dimensions: | Custom |
| Surface Figure: | Lambda/4 @ 633nm |
| Surface Quality: | 20-10 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 precise prism orientation is challenging.
- Constant Deviation: The 90º deviation angle is consistent for all rays transmitted by the effective aperture, regardless of their angle with respect to the optical axis.
- Material Options: Available in BK7, UVFS, FS, and CaF2 materials, catering to diverse optical requirements.
- Surface Figure: Achieves λ/20 at 633 nm for BK7, UVFS, and FS materials, and λ/4 at 633 nm for CaF2, ensuring high precision.
- Surface Quality: High-quality polished surfaces with a surface quality of 10-5 for BK7, UVFS, and FS, and 20-10 for CaF2.
- Dimensional Tolerance: Precise dimensions with a tolerance of +0.000", –0.010".
- Angular Deviation: Maintains an angular deviation of ≤ 3 arc minutes, ensuring accuracy in optical applications.
- Bevels: Features bevels of 0.010" – 0.030" at 45º for added protection and integration ease.
- Clear Aperture: Exceeds the central 85% of diameter, providing a large and effective optical area.
- Reflective Coating: Reflecting surfaces require metal or dielectric coatings due to geometry, enhancing performance.
Applications
- Surveying Instruments: Penta prisms are used in surveying instruments to redirect light paths by 90º without inverting or reversing the image, ensuring accurate measurements.
- Alignment Systems: These prisms are essential in alignment systems where precise beam deviation is required, regardless of the incident angle.
- Optical Instruments: In various optical instruments, penta prisms are used to manipulate light paths for imaging and measurement purposes.
- Laser Systems: Penta prisms are used in laser systems to steer beams accurately without altering the orientation of the image.
- Photography: They are used in camera viewfinders to provide a correctly oriented image to the photographer.
- Architectural Engineering: In architectural engineering, penta prisms assist in precise angle measurements and alignments.
- Military Applications: Penta prisms are utilized in military optics for targeting and range-finding equipment.
- Scientific Research: These prisms are used in scientific research setups where controlled beam deviation is necessary.
Frequently Asked Questions
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.
Penta Prisms deviate a beam by 90º without inverting or reversing the image.
The dimensional tolerance of Penta Prisms is + 0.000", – 0.010".
Materials used to make Penta Prisms are BK7, UVFS, FS, CaF2.
The angular deviation of Penta Prisms is ≤ 3 arc minutes.