Means to lessen unwanted reflections in an optical device

Details Means to lessen unwanted reflections in an optical device Means to lessen unwanted reflections in an optical device

G - Physics

02

B

G02B 27/10 (2006.01) G02B 6/26 (2006.01)

Patent

CA 2147937

An device for splitting an optical beam into two beams propagating along different optical paths, is provided. The device includes a pair of graded index collimating lenses having their planar collimating ends aligned such that they are both inwardly facing and share a common optical axis. A partially transmitting partially reflective material is disposed between the lenses. At least one of the planar endfaces of the collimating ends are wedge shaped such that a non-zero angle is formed between the two endfaces. This non-zero angle reduces the effect of unwanted optical interference.

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