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dove prisms0 pages
Dove Prisms
Invented by H.W. Dove, Dove Prisms are also known Reversion prisms. When the
prism is rotated about its length axis, the image viewed through the prism rotates at
twice the prism rotation rate. This is an unusual and sometimes useful property for
special applications. Entry and exit faces are anti-reflection coated.
Attribute | Specification |
Length(mm) | >3mm |
Tolerance (mm) | ±0.05 |
Angle tolerance | 1 minute |
Surface Quality | 40/20 |
Flatness (per25mm@633nm) | W4@any 25.4mm area |
Bevel (face width x45°) | <0.25mm |
Roof Prism (Amici Prism)
Roof prism is combined with a right angle prism and a totally internally reflecting
roof attached to hypotenuse surface. It can invert and reverse an image, also,
deflect the image 90°. Therefore, it is often used in terrestrial telescopes, viewing
systems and rangefinders.
Attribute | Specification |
Length(mm) | >3mm |
Tolerance (mm) | ±0.05 |
Angle tolerance | 1 minute |
Surface Quality | 40/20 |
Flatness (per 25mm@633nm) | A/4@any 25.4mm area |
Bevel (face width x 45°) | <0.25mm |
Rhomboid Prisms
Rhomboid prisms are commonly used to displace a laser beam without changing its
direction. In imaging applications, rhomboid prisms will displace the optical axis
without inverting the image.
Attribute | Specification |
Length(mm) | £3mm |
Tolerance (mm) | ±0.05 |
Angle tolerance | 30 arc minute |
Surface Quality | 40/20 |
Flatness {per25mm@633nm) | A/4@any 25.4mm area |
Bevel (face width x 45°) | <0.25mm |
