Total internal reflection knife edge

Details Total internal reflection knife edge Total internal reflection knife edge

1995-08-14

1996-09-10

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

385 33, 385 47, G02B 632

Patent

active

055553281

ABSTRACT:
There is disclosed a total reflection knife edge which is a transparent optical element for receiving a scanning light beam and allowing the light beam at certain locations to enter a fiber optic element or blocking the light beam at certain locations from entering the fiber optic element. The total reflection knife edge of this invention comprises a convex surface to focus the scanning light beam on a surface which is substantially perpendicular to the propagation direction of the scanning light beam. This surface allows the scanning light beam to exit the total internal reflection knife edge and enter the fiber optic element. The total reflection knife edge of this invention also has a surface which is at an angle to the propagation direction of the scanning light beam. The angled surface reflects the incoming scanning light beam back into the internal reflection knife edge to prevent the light beam from entering the fiber optic element.

REFERENCES:
patent: 4479697 (1984-10-01), Kapany et al.
patent: 4699453 (1987-10-01), Roberts
patent: 4993796 (1991-02-01), Kapany et al.

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