Visible-range material
N-BK7 provides a familiar optical-glass option for laboratory imaging, alignment, and measurement assemblies.
✔ OEM / ODM Customization
✔ Free Drawing DFM Technical Review
✔ 24-Hour Professional Quotation
✔ Flexible Low MOQ & Fast Prototypes






This rhombic Dove prism is precision ground and polished to rotate an image by 180 degrees while keeping the transmitted beam path compact. Felix Glass Co., Limited supplies drawing-based dimensions, uncoated parts, and optional high-reflection mirror-coated surfaces for optical alignment, interferometry, laboratory imaging, and instrument integration.

A Dove prism inverts an image after one internal reflection. When the prism rotates around its optical axis, the observed image rotates at twice the prism angle. This behavior makes the component useful where image orientation must be changed without adding a multi-element relay assembly.
System performance depends on entrance angle, material, surface quality, prism geometry, and any reflective coating. Final dimensions and tolerances should therefore be reviewed against the optical path and mounting design.

The following values preserve the original product specification and are provided as a project reference. Confirm production tolerances for the required size, coating, wavelength, and quantity.
| Material | N-BK7 optical glass | Prism type | Rhombic Dove reflective prism |
|---|---|---|---|
| Core function | 180-degree image rotation and optical-path inversion | Coating | Uncoated or optional high-reflection mirror coating |
| Surface quality | 20/10; 60/40 optional | Surface flatness | 1/8 wave at 633 nm |
| Clear aperture | At least 80% of the central area | Angular tolerance | Up to ±3 arc minutes |
| Customization | Side length, geometry, edge treatment, and coating review | Origin | Guangdong, China |

N-BK7 provides a familiar optical-glass option for laboratory imaging, alignment, and measurement assemblies.
Drawing-based dimensions and tolerances can be reviewed for prototypes, replacement parts, and repeat production.
Use an uncoated prism when appropriate, or request a reflective coating based on wavelength and system requirements.
The prism supports image inversion and rotation without requiring a long multi-lens image relay.
Image-orientation control in calibration fixtures and compact optical benches.
Optical measurement equipment where image inversion or controlled rotation is part of the system design.
Research imaging paths, beam-rotation platforms, and experimental optical assemblies.
Miniature sensing, spectroscopy, and custom optical modules with restricted installation space.
Confirm drawing, material, wavelength, tolerance, coating, and quantity.
Review grinding, polishing, edge treatment, coating, and inspection requirements.
Arrange the agreed sample or batch route and control the specified dimensions.
Check the agreed optical and mechanical criteria before clean packaging.

Inspection scope should match the system risk and drawing. Common review points include material confirmation, dimensions, angle, surface quality, flatness, clear aperture, coating appearance, and optical performance. Share any required test method or report format when requesting a quotation.
No. In the standard operating principle, the image rotation is twice the mechanical rotation angle of the Dove prism.
Yes. The original product supports an uncoated option as well as an optional high-reflection mirror coating.
Send the drawing, dimensions, material, wavelength, coating faces, tolerances, quantity, and inspection requirements.
Yes. Drawing-based side length and related mechanical requirements can be reviewed for custom production.
Send your drawing and optical requirements to Felix Glass Co., Limited. The team can review N-BK7 geometry, tolerances, coating, quantity, and inspection needs before quotation.
Send us your drawing, dimension & coating requirements for fast quotation within 24 hours.
Get Free RFQWe supply Industrial Glass, Sapphire Optics, Optical Lenses/Prisms/Filters, Infrared IR Optics, Functional & Display Glass, N-BK7/H-K9L Optical Glass, supporting OEM mass production and laboratory custom prototypes. Flexible MOQ & free sample service available. Fill in the form to download full datasheets and get factory wholesale price within 24 hours.

FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.
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.
A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.
All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.
Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.