Rugate filter having suppressed harmonics

Details Rugate filter having suppressed harmonics Rugate filter having suppressed harmonics

1995-06-06

1996-06-04

Lerner, Martin

Optical: systems and elements

Light interference

Produced by coating or lamina

359586, 359589, G02B 528

Patent

active

055238823

ABSTRACT:
A rugate filter (10) having suppressed harmonics includes a layer (18) of material disposed on a surface (14) of an optical substrate (12) having an index of refraction versus thickness profile that is the superposition of a principle sinusoid and a secondary sinusoid. The secondary sinusoid being superimposed about -90 degrees out of phase with the principle sinusoid.

REFERENCES:
patent: 4583822 (1986-04-01), Southwell
patent: 4826267 (1989-05-01), Hall et al.
patent: 4934788 (1990-06-01), Southwell
patent: 4952025 (1990-08-01), Gunning, III
patent: 4958892 (1990-09-01), Jannson et al.
patent: 5009485 (1991-04-01), Hall
patent: 5056009 (1991-10-01), Bradley
patent: 5181143 (1993-01-01), Southwell
patent: 5225930 (1993-07-01), Land et al.
patent: 5258872 (1993-11-01), Johnson et al.
patent: 5291332 (1994-03-01), Siebert
patent: 5293548 (1994-03-01), Siebert
W. H. Southwell, "Rugate Index Profile Which Suppresses All Harmonic Stopbands," Optical Society of America, Technical Digest, Topical Meeting on Optical Interference Coatings, pp. 142 to 147 (1988).

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