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 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.
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?
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.
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.
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.