Prisms

Corner Cube Retroreflectors

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.

Material:------------------------- N-BK7 Grade A optical glass
Dimension Tolerance: ------+0.0/-0.2 mm
Clear Aperture: -------------->80%
Deviation:--------------------- 180°±3 arc seconds
Flatness: -----------------------l/4 on big surface, l /10 on other surfaces
Surface Quality:------------- 60/40 
Wavefront Distortion:-----λ/2 @633nm
Bevel:------------------------- 0.2 mm to 0.5 mm
Coating on input and output sides:------Unpon 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″,  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.

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