BK7 Optical Glass Rhomboid Prism
Featured Product from Changchun Yutai Optics Co., Ltd.
What are the advantages of BK7 (K9) rhomboid prisms?
No image rotation: preserves the original image orientation (unlike penta or dove prisms, which introduce rotation).
Low dispersion: high Abbe number of BK7 glass minimizes chromatic aberration, making it ideal for broadband light sources (e.g., white-light interferometers).
High transmittance: with AR coating, single surface reflectance is <0.2%@visible wavelengths, maximizing light throughput.
| Rhomboid prism vs. other translational prisms | |||
| Prism Type | Optical Path | Aspect of Image | Applicable Scene |
| Rhomboid Prism | Translation + imageless rotation | Keep the original image | Interferometer, precise optical path adjustment |
| Penta Prism | 90° rotation + imageless rotation | Keep the original image | Rangefinder, optical aiming |
| Right Angle Prism | 90° rotation + mirror image reversal | Reverse left and right | Telescope, simple optical path folding |
