Poor angular accuracy causes beam deviation and unstable optical system performance
High-Quality K9 Optical Prisms — Factory Direct Custom Manufacturing
- Model
- K9-PRISM-CUSTOM
Item specifics
- 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
Review
Description
Felix Glass supplies custom K9 (H-K9L) optical prisms equivalent to Schott N-BK7. We produce right angle, equilateral, penta, dove, corner cube and special shaped prisms for machine vision, laser systems, spectroscopy, medical instruments and surveying equipment. Strict angle tolerance, premium surface quality and optional optical coatings available. Low-grade glass contains bubbles and striae, leading to stray light and image distortion Suppliers unable to deliver special geometries, customized coatings and small prototype batches Standard low-quality prisms introduce beam shift, ghost reflections and light loss. Our H-K9L optical prisms are manufactured from high-homogeneity glass blank with controlled bubble and striae class. CNC grinding and precision polishing guarantee tight angle tolerance and smooth optical surfaces. Custom AR, HR or metallic coatings maximize throughput for visible and near-infrared optical systems. N-BK7 equivalent borosilicate crown glass with stable transmission from 350 nm to 2.0 μm, low thermal expansion and good chemical resistance. Available surface quality 60/40, 40/20, 20/10; flatness up to λ/10 and angle tolerance down to ±30 arc seconds for high-precision applications. Produce prisms according to customer drawings: dimensions, bevel, shading, spectral coatings and inspection standards all customizable. H-K9L (Chinese K9) has nearly identical optical parameters to Schott N-BK7: refractive index nd≈1.5168, Abbe number νd≈64.2. We can produce from either material as requested. All coatings are deposited via ion-assisted deposition inside in-house vacuum chambers. Different prism geometries serve unique optical functions. We assist customers to select suitable prism type, tolerance grade and coating scheme according to operating wavelength and system requirements. Equilateral and Pellin-Broca prisms for wavelength separation, monochromators and laboratory spectral measurement equipment. Penta prisms, retroreflectors and right-angle prisms used in alignment systems, rangefinders and automated inspection machines. Beam steering, folding and image rotation components for diode lasers, fiber lasers and industrial imaging cameras. Raw H-K9L blank checked for striae, bubbles and refractive index homogeneity before machining. CNC forming to approach target angles and dimensions, reserve allowance for fine polishing. Pitch polishing to achieve required surface quality, flatness and surface roughness. Edge protection bevel, then IAD vacuum coating according to specified spectral requirements. Angle test, interferometer flatness test, surface visual inspection and spectrophotometer verification before shipment. We accept single-piece prototype orders for performance verification. To receive accurate quotation, please provide engineering drawing, material selection, prism type, dimension tolerances, coating specification, surface quality grade, operating wavelength and required inspection documents. Sample lead time depends on geometry complexity and coating process. Our optical engineers provide DFM design suggestions to reduce manufacturing cost and shorten lead time. Visible & near-infrared applications, balanced cost and optical performance, standard indoor and moderate outdoor optical systems. UV transmission required, high temperature working environment, low thermal expansion critical for ultra-stable systems. Extreme abrasion resistance, high pressure, harsh chemical environment and long service lifetime required. H-K9L is Chinese standard borosilicate crown glass, optical parameters nearly identical to Schott N-BK7. We can produce from either material per your requirement. Yes. We support single-piece sampling for performance validation. Lead time depends on prism shape and coating requirements. MgF₂ single layer AR, broadband AR coating, aluminum, silver and gold high-reflection coatings for specified wavelength bands. Yes. We fabricate special irregular prisms, combined prisms and customized geometries strictly according to customer engineering drawings. Certificate of Conformity, surface quality report, interferometer flatness data, spectral transmission test report upon request. Share your drawing, target dimensions, material, coating requirement and order quantity. Our optical engineering team will review manufacturability and send detailed quotation for custom K9 optical prisms.
H-K9L / N-BK7 equivalent optical prism for industrial & laboratory optics
Custom K9 Optical Prisms | High Precision H-K9L BK7 Prism Manufacturer
Engineering pain points we resolve
Common Challenges With Optical Prism Procurement
Direct engineering overview
How Our Precision K9 Optical Prisms Eliminate System Errors
Premium H-K9L Glass Substrate
Tight Tolerance Polishing
Full Customization Supported
Material & coating reference
H-K9L VS N-BK7 | Available Optical Coatings
Technical specification table
Key Specifications of Custom K9 Optical Prisms
Item
Parameter
Material
H-K9L (K9), equivalent to Schott N-BK7
Transmission Range
350 nm ~ 2.0 μm
Surface Quality
Standard 60/40; precision 40/20, 20/10 (MIL-PRF-13830B)
Surface Flatness
Standard λ/4 @632.8nm; precision λ/10 optional
Angle Tolerance
Standard ±3 arc min; high precision ±30 arc sec
Size Range
3 mm ~ 300 mm, manufactured per customer drawing
Application matching
Main Application Fields of K9 Optical Prisms
Spectroscopy & Analytical Instruments
Metrology & Survey Equipment
Laser & Machine Vision Systems
Manufacturing workflow
Complete Production Process of K9 Optical Prisms
Glass Blank Inspection
CNC Precision Grinding
Optical Polishing
Beveling & Optical Coating
Full Inspection & Packing
Sampling & mass production support
From Prototype Samples To Bulk OEM Optical Prism Orders
Material selection guide
Select Suitable Optical Glass For Your Prism Project
Choose H-K9L / N-BK7 Prism When
Choose Fused Silica Prism When
Choose Sapphire Prism When
Related precision optical components
Optical Product Cluster Internal Links
Buyer FAQ
Frequently Asked Questions About K9 Optical Prisms
What is the difference between K9 (H-K9L) and N-BK7?
Can I order only 1 piece for prototype testing?
What reflective and anti-reflective coatings can you apply?
Can you manufacture non-standard custom prism shapes?
What documents can you provide with shipment?
Action stage
Send Your Prism Drawing For Technical Evaluation & Formal Quotation
