Factory Custom High-Quality K9 (H-K9L / N-BK7) Optical Prisms — Right Angle, Equilateral, Penta, Dove, Corner Cube
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| Categories | Optical Prisms |
| Brand | FELIX GLASS optical glass Manufacturing base |
| Model | K9-PRISM-CUSTOM |
| Material | H-K9L (N-BK7 Equivalent) |
| Dimensions | 3 mm to 300 mm, Customizable |
| Surface Quality | 60/40 to 20/10 (MIL-PRF-13830B) |
| Surface Flatness | λ/4 to λ/10 @ 632.8 nm |
| Angle Tolerance | ±3' to ±30'' (Standard to Precision) |
| Coating | Uncoated / MgF2 AR / Broadband AR |
| Prism Types | Right Angle, Equilateral, Penta, Dove, Corner Cube, Roof, Custom |
| Clear Aperture | ≥ 90% of Central Dimension |
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High-Quality K9 Optical Prisms — Factory Direct Custom Manufacturing
As a leading manufacturer with over 15 years of precision optics experience, we produce high-performance K9 (H-K9L / N-BK7 equivalent) optical prisms for demanding industrial, scientific, and imaging applications. Our optical prisms are engineered to deliver exceptional light transmission, precise angular accuracy, and outstanding surface quality. Every prism undergoes rigorous quality inspection before shipment.
Technical Specifications of Our K9 Optical Prisms
Our optical prisms are manufactured to tight tolerances using premium-grade K9 (H-K9L) optical glass. Below are the standard and precision-grade specifications available.
Material
H-K9L (Chinese K9) / N-BK7 equivalent. High-purity borosilicate crown glass with excellent transmission from 350 nm to 2.0 μm.
Dimensions
Customizable from 3 mm to 300 mm. Standard right-angle prisms from 5 mm to 100 mm. All dimensions manufactured to drawing specifications.
Surface Quality
Standard 60/40 scratch-dig per MIL-PRF-13830B. Precision grade available at 40/20 or 20/10 for demanding laser and imaging applications.
Surface Flatness
λ/4 at 632.8 nm standard. Precision λ/10 available. Measured with Zygo interferometer for guaranteed accuracy.
Angle Tolerance
Standard ±3 arc minutes. High-precision ±30 arc seconds available. Verified on autocollimator for critical applications.
Coating Options
Anti-reflective (AR) MgF2 coating, broadband AR, or custom dielectric coatings. Uncoated also available with R < 4%25 per surface.
Types of Optical Prisms We Manufacture
We produce a comprehensive range of K9 optical prisms to suit diverse optical system requirements. Each type is custom-manufactured to your exact specifications.
Right Angle Prisms
90° deviation with hypotenuse reflection. Used in beam steering, periscopes, and image erection systems. Available from 3 mm to 200 mm.
Equilateral Prisms
60° equilateral design for light dispersion and wavelength separation. Ideal for spectroscopy, educational demonstrations, and wavelength selection.
Penta & Roof Prisms
Constant 90° deviation independent of orientation. Used in surveying instruments, rangefinders, and terrestrial telescopes. High angular accuracy.
Corner Cube & Dove Prisms
Retroreflectors and image rotators for laser tracking, alignment, and interferometry. Dove prisms rotate images without deviating the beam path.
Key Features & Advantages of K9 Optical Prisms
Our optical prisms are engineered for reliability in demanding optical systems. Each prism is manufactured with precision processes and thorough quality control.
Superior Transmission
Excellent transmittance from 350 nm to 2.0 μm with low absorption, making our optical prisms ideal for UV, visible, and near-IR applications.
Thermal Stability
Low coefficient of thermal expansion (7.1 × 10-6/K) ensures stable optical performance across varying environmental temperatures.
Chemical Durability
Class 1 hydrolytic resistance and climate resistance per ISO 719, ensuring long-term stability of our optical prisms in humid or harsh environments.
Minimal Bubble & Inclusion
Bubble class 1 (ISO 10110-3) with extremely low inclusion content. Each batch of optical prisms is inspected under controlled illumination.
Custom Coatings
Apply anti-reflective, high-reflective, or beamsplitter coatings on our optical prisms. In-house coating capability reduces lead time and ensures quality.
Full Inspection Report
Every batch of optical prisms ships with a detailed quality inspection report including interferometry data, angle measurement, and surface quality verification.
Applications of K9 Optical Prisms Across Industries
From laboratory research to industrial automation, our optical prisms serve critical functions in diverse optical systems worldwide.
Spectroscopy & Analysis
Equilateral and Pellin-Broca optical prisms for wavelength dispersion in spectrometers, monochromators, and analytical instruments. High dispersion with excellent throughput.
Imaging & Photography
Roof prisms and Porro prisms for image erection in binoculars, telescopes, and digital camera viewfinders. Compact optical prisms with high image fidelity.
Laser Systems
Right-angle and corner cube optical prisms for beam steering, alignment, and cavity folding in Nd:YAG, diode, and fiber laser systems. High damage threshold coatings available.
Medical & Life Sciences
Precision optical prisms for endoscopes, ophthalmic instruments, flow cytometers, and diagnostic imaging. Biocompatible coating options for medical-grade devices.
Industrial Metrology
Penta prisms and retroreflectors in surveying equipment, alignment systems, and automated inspection. Our optical prisms maintain accuracy under vibration and temperature changes.
Aerospace & Defense
MIL-SPEC qualified optical prisms for periscopes, targeting systems, and avionics HUDs. Radiation-resistant glass variants available for space applications.
Manufacturing Process of Our Optical Prisms
Every optical prism goes through a carefully controlled manufacturing workflow designed to meet exact specifications.
Material Selection & Blank Preparation
We source premium H-K9L glass blanks from certified Schott and CDGM suppliers. Each blank is inspected for striae, bubbles, and refractive index homogeneity before processing.
CNC Grinding & Precision Polishing
CNC-controlled grinding and pitch-polishing achieve precise angles and surface flatness. Double-sided polishing for parallel surfaces of our optical prisms ensures consistent quality.
Beveling & Coating Application
Protective bevels prevent edge chipping. Optical coatings are applied using ion-assisted deposition (IAD) for durability. Spectral performance of coated optical prisms is verified on spectrophotometer.
Final Inspection & Packaging
100% inspection including Zygo interferometry, autocollimator angle verification, and visual surface inspection per MIL-PRF-13830B. Optical prisms are packed in cleanroom-grade packaging for safe transit.
Frequently Asked Questions About K9 Optical Prisms
What is the difference between K9 and N-BK7 optical glass for prisms?
K9 (H-K9L) is the Chinese standard equivalent of Schott N-BK7. Both are borosilicate crown glasses with nearly identical refractive index (nd ≈ 1.5168 at 587.6 nm) and Abbe number (νd ≈ 64.2). Our optical prisms can be manufactured from either material based on your preference, with H-K9L offering a cost-effective alternative without compromising optical performance.
What is the minimum order quantity (MOQ) for custom optical prisms?
We accept orders starting from 1 piece for prototype and sample evaluation. For production quantities, typical MOQ is 10–50 pieces depending on the complexity of the optical prisms. Contact our sales team with your drawing for a tailored quotation.
Can you apply anti-reflective coatings on K9 optical prisms?
Yes. We offer single-layer MgF2 AR coatings (R < 1.5%25 per surface), broadband AR coatings (Ravg < 0.5%25 from 400–700 nm or customized spectral ranges), and high-power laser coatings. Coated optical prisms achieve significantly higher throughput in multi-element optical systems.
What tolerances can you guarantee on optical prisms?
Standard tolerance: Angle ±3 arc min, surface flatness λ/4, surface quality 60/40, dimensional tolerance ±0.1 mm. Precision tolerance: Angle ±30 arc sec, surface flatness λ/10, surface quality 20/10, dimensional tolerance ±0.02 mm. Specify your requirements when inquiring about custom optical prisms.
How do you package and ship optical prisms internationally?
Optical prisms are individually wrapped in lens tissue, placed in anti-static foam-lined boxes, and shipped in double-wall corrugated cartons. We ship worldwide via DHL, FedEx, UPS, or sea freight. Custom packaging and labeling are available for OEM requirements.
Why Choose Our Optical Prisms for Your Project
Partner with a factory-direct manufacturer that delivers precision optical prisms with certified quality, competitive pricing, and responsive technical support.
Fast Turnaround
Standard optical prisms ship in 7–15 business days. Rush orders accommodated.
Full Documentation
CoC, interferometry reports, and spectral curves provided with every shipment of optical prisms.
Technical Support
Our optical engineers assist with material selection, coating design, and tolerance analysis.
Global Shipping
We export optical prisms to 50+ countries with reliable logistics and customs support.
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- What is your MOQ for custom optical glass and display glass parts?
Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.
- Do you offer one-stop custom optical glass processing services?
Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.
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