Single-notch rugate filters and a controlled method of manufactu

Details Single-notch rugate filters and a controlled method of manufactu Single-notch rugate filters and a controlled method of manufactu

1988-05-31

1990-04-10

Arnold, Bruce Y.

350320, G02B 528

Patent

active

049154761

ABSTRACT:
A process for forming a single-notch optical filter having a continually and accurately varying periodic profile. An optical medium is coated on a uniform substrate where the homogeneous optical medium produces a rugate filter, so that the profile of the refractive index follows a sinusoidal pattern and Bragg's law. As the optical medium is coated on the substrate, the depositing film is monitored by optical techniques, and feedback information is provided to a computer driven by a pre-programmed process control algorithm so that real time control of the manufacturing process may be accomplished.

REFERENCES:
patent: 4545646 (1985-10-01), Chern et al.
patent: 4707611 (1987-11-01), Southwell

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