Prisms

Reflection Prism

Reflection Prism

The reflection prisms are usually used for diverging the ray or for changing image location in relation to the subject (rotation, inversion). All the surfaces of the reflection prisms are flat. Reflection surfaces are mirrored, but it is possible, however to make use of Total Internal Reflection (TIR). Besides the Right angle prism, Penta prism, Corner Cube and Dove Prism, Foctek also produces many other kinds of Reflection Prism, for examples, the Bauernfeind Prism, Roof Prism, Rhomboid Prism, Abbe-Koenig Prism.
BAUERNFEIND prism 60°
  The input beam is deflected by 60°, which depends on the 60° angle between the input surface and the first reflection surface. There is neither horizontal nor vertical displacement of the image. It is necessary to put the mirror coating on the longer short surface of the prism
BAUERNFEIND prism 45°
 
The input beam is deflected by 45°. There is neither horizontal nor vertical displacement of the image. It is necessary to put the mirror coating on the longer short surface of the prism.
AMICI roof prism
 
AMICI reflection prism called also roof prism or right angle roof prism, which deflects the beam through an angle of 90° and inverts the image. For this reason, this prism is perfect for erecting images inverted by the objectives.
RHOMBOID prism (off-set prism)
 
The RHOMBOID prism simply displaces beam at a certain distance. It doesn't cause any deviation and influence on orientation of the image.
ABBE-KOENIG prism
 
ABBE-KOENIG prism is an image erector. It consists of one roof prism and one right angle prism with their hypotenuse surface cemented. The Prism completely reverses the image.

Material

On request, for example, N-BK7, Fused Silica, N-SF11, N-SF10

Range of Size

4 ~ 300 mm

Dimension Tolerance

+/-0.1 mm

Clear Aperture

>90%

Angle Accuracy

+/- 3 arc min

Pyramid error

+/- 5 arc min

Flatness @633 nm

<Lambda/2

Surface Quality

60/40

Coating

Uncoated,AR,HR,PR coated ect.

Note:
According to Customer's requirement, we can make non-standard Reflection Prisms with significantly higher optical parameters. Surface quality better than 10/5, flatness better than 10, angle tolerance better than +/-10 arc sec is available. Prism in mounting is also available.

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