Corner Cube Retroreflectors

Corner Cube Prism is also called Retroreflector or Trihedral Prism. In the Corner Cube Prism, three reflecting surfaces are perpendicular to each other, like the side wall of the cube. The input surface is perpendicular to the cube diagonal. Disregarding the angle of incidence, the output beam is parallel to the input one, but it is of opposite direction. Inset of the several corner prisms, for better matching, their entrance-exit surface is often hexagonal. In case of this prism the phenomenon of full internal reflection occurs so it is not necessary, (however it is possible) to put mirror coating on the reflecting faces. Normally the reflection surfaces are Al reflection coating, and then covered with Cu and Black Painting.

Standard Specifications

Attribute	Specification
Material	N-BK7 Grade A optical glass
Dimension Tolerance (mm)	+0.0/-0.2
Clear Aperture	80%
Deviation	180⁰±3 arc senconds.
Flatness (@633nm)	λ/4 on big surface, λ/8 on reflection surfaces
Surface Quality	60/40
Bevel (mm)	0.2-0.5
Reflection coating on reflection surfaces	upon request
Coating on input and output sides	upon request

Part No.	f (mm)	h (mm)
FCC1101	15	11.3
FCC1102	25.4	19
FCC1103	38	28.5
FCC1104	50.8	37.5

Note for corner cube retroreflector:

(1). Besides N-BK7, custom-made corner cube Prisms made of other optical materials are available.
(2). Corner Cube Prisms with lower deviation tolerance, such as 1’, 30”, or 10″, 5", 3", 1", 0.5" are available.
(3). Corner Cube Prisms with better surface Quality (better than 40/20 or 20/10) are available.
(4). HR or Metal reflection coating(Al, Ag, Cu, etc.) on reflection surfaces is available.
(5). AR coating on input/output surface is available upon request.
(6).Custom-made non-standard Corner Cube Prisms at any other size are available upon request.

Beamsplitter Penta Prism Dove Prisms

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