Half Penta Prism
Half Penta Prisms are precision optical prisms designed for accurate beam deviation and image alignment applications. Unlike standard right-angle prisms, half penta prisms provide a fixed beam deviation angle with reduced sensitivity to prism rotation. Chenyu Optics manufactures half penta prisms in BK7, fused silica and UV fused silica with custom dimensions and coatings.
Half Penta Prism Overview
Half Penta Prisms are precision optical prisms designed for accurate beam deviation and image alignment applications. Unlike standard right-angle prisms, half penta prisms provide a fixed beam deviation angle with reduced sensitivity to prism rotation.
They are widely used in optical alignment systems, surveying instruments, imaging systems and precision measurement equipment where a stable, rotation-insensitive beam deviation is required.
Chenyu Optics supports custom half penta prism manufacturing according to customer drawings, including custom size, angle tolerance and coating design for prototype and repeat production.
Key Advantages of Half Penta Prism
Optical Alignment & Measurement
Half penta prisms are widely used for fixed beam deviation in optical alignment systems, surveying instruments and precision measurement equipment.
Typical Specifications of Half Penta Prism
| Material Options | BK7, Fused Silica, UV Fused Silica |
|---|---|
| Optical Function | Fixed beam deviation |
| Deviation Angle | Drawing-defined (standard or custom angle per design) |
| Deviation Angle Tolerance | Drawing-defined |
| Angle Tolerance | Drawing-defined |
| Dimension Range | Drawing-defined (custom sizes available) |
| Clear Aperture | Drawing-defined |
| Surface Accuracy | λ/4 – λ/10 @ 633 nm |
| Surface Quality | 20-10, 40-20 scratch-dig |
| Chamfer | Drawing-defined |
| Edge Treatment | Fine ground, chamfered or polished |
| Working Wavelength Range | Drawing-defined (depends on material and coating design) |
| AR Coating Wavelength Range | Drawing-defined (per coating design) |
| Coating Options | Uncoated, broadband AR, laser AR, UV AR, custom coating |
Half Penta Prism Structure
Why Choose Chenyu Optics for Half Penta Prism
Chenyu Optics focuses on drawing-based precision prism manufacturing for alignment, measurement and imaging optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard half penta prisms.
Manufacturing Capability for Half Penta Prism
Precision Polishing
Controlled polishing and angle processing for surface accuracy, surface quality and stable beam deviation performance.
Optical Coating
Broadband AR, laser AR and UV AR coating options for entrance and exit surfaces of visible and laser half penta prisms.
Inspection & Packaging
Dimensional inspection, angle verification, optical performance checking and clean protective packaging before shipment.
Custom Manufacturing Options for Half Penta Prism
Dimensions & Geometry
Custom size and edge form can be manufactured according to customer drawings, with precision-controlled deviation angle and angle tolerance.
Surface & Mechanical Quality
Surface accuracy, surface quality and angle accuracy can be selected according to optical alignment performance and mounting structure.
Coating & Wavelength Design
Uncoated surfaces, broadband AR, laser AR and UV AR coatings can be specified for entrance and exit faces depending on the optical system.
Half Penta Prism Material Comparison
| BK7 | Fused Silica | UV Fused Silica | |
|---|---|---|---|
| Transmission | Visible to near-infrared, limited UV performance | UV to NIR, depending on grade | Deep UV to visible, optimized UV transmission |
| Thermal Stability | Moderate thermal stability | Excellent, low thermal expansion | Excellent, low thermal expansion |
| Typical Use | General visible alignment and cost-sensitive systems | Laser measurement, broadband imaging, precision instruments | UV laser systems, UV alignment, analytical instruments |
| Selection Note | Preferred for general visible applications with lower cost requirements | Preferred when broadband UV-to-NIR performance is required | Preferred when deep UV transmission is required |
Half Penta Prism vs Penta Prism
| Half Penta Prism | Penta Prism | |
|---|---|---|
| Primary Function | Compact beam deviation | Fixed 90° beam deviation |
| Structure | More compact geometry | Full penta prism structure |
| System Space | Suited to space-limited systems | Typically requires more mounting space |
| Custom Parameters | Angle, dimensions, coating | Dimensions, accuracy, reflective coating |
Applications of Half Penta Prism
Optical Alignment Systems
Fixed beam deviation for precision optical alignment applications.
Surveying Instruments
Stable beam deviation for surveying and positioning instruments.
Imaging Optical Systems
Optical path folding for imaging system design.
Laser Measurement
Beam deviation control for laser measurement equipment.
Machine Vision Systems
Optical path control for industrial machine vision applications.
Precision Inspection Instruments
Stable beam deviation for precision inspection and metrology equipment.
Half Penta Prism FAQ
What is the function of a half penta prism?
A half penta prism is used to provide a fixed beam deviation angle while maintaining stable optical alignment performance.
What materials can be used for half penta prisms?
Common materials include BK7, fused silica and UV fused silica, selected according to wavelength requirements.
Are AR coatings necessary for half penta prisms?
AR coatings are optional but can improve transmission efficiency by reducing surface reflections.
Can half penta prisms be customized?
Yes. Custom dimensions, angular tolerances, materials and coatings are available.
What information should I provide for a quotation?
Please provide material, dimensions, surface quality, surface accuracy, angle tolerance, coating requirement, quantity and drawing if available.
Where can I learn more about optical prisms?
Additional optical prism information can be found from Edmund Optics.
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Need Custom Half Penta Prisms?
Send us your drawing, material preference, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable half penta prism manufacturing suggestion.