English
Dove prisms are typically employed as image rotators. Due to the oblique angle of incidence with respect to the incident surface, when a Dove prism is unfolded along its reflecting surface, it effectively behaves as an inclined parallel plate. This setup causes dispersion of the light beam within the prism, resulting in different colors of light emerging parallel to each other at the exit end.
A Dove prism serves as an image rotator. After passing through the prism, the image is inverted by 180 degrees. Additionally, when the prism is rotated about its optical axis, the rotation angle of the image is twice that of the prism. Generally, Dove prisms utilize the principle of total internal reflection at the critical angle, which limits their field of view. Ensuring the cleanliness of the reflecting surface and using parallel light are also crucial for the proper operation of Dove prisms.
| Material | BK7 glass / UV Fused silica |
| Dimension | 3mm~200mm |
| Dimension tolerance | ±0.1mm~±0.05mm |
| Surface quality | 60/40, 40/20, 20/10 |
| Surface flatness | λ/20 – λ/4 |
| Angle tolerance | <30arc sec. ~5arc min |
| Bevel | <0.25mm×45° |
| Coating | As per customized request |
Depending on the rotation Angle of the prism and the incidence surface of the light, the image can be rotated, inverted or reflected backward.
When the Dowell prism is used for image rotation or inversion, both the incident plane and the exit plane of the Dowell prism are not perpendicular to the optical axis, but the direction of the outgoing light and the incident light is unchanged. At this time, due to the large incidence Angle, the beam will be fully reflected on the bottom surface of the prism, so the internal transmittance of the Dowell prism is only limited by the absorption rate of the prism.
When the Dowell prism rotates θ Angle about the optical axis, the outgoing image rotates 2θ Angle in the same direction, so it is commonly used as an image rotator.
Image Rotation: Dove prisms can rotate or invert images based on the prism's rotation angle and the angle of incident light. Image Rotator: By rotating the prism around its optical axis, it can achieve image rotation, commonly used in optical instruments that require changing the direction of the image.
Interferometry: In optical measurements, Dove prisms are often used in interferometry techniques to help accurately measure and analyze the phase and amplitude of light waves.
Astronomical Observation:In the field of astronomy, Dove prisms are used in telescopes to help focus and adjust the light entering the telescope, thereby improving observational results.
Model Recognition: In applications requiring identification or positioning of specific models or objects, Dove prisms can assist in achieving this function through their unique optical properties.
Detector Applications: In optical detection equipment, Dove prisms are used to enhance or alter the transmission path of light, facilitating detection and analysis.
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