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Primary Examiner: Sikes, William L.
Assistant Examiner:
Attorney: Kelman; Kurt

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Title: Tunable optical device

Abstract: A tunable optical device is produced by forming in the surface of a substrate a fan-shaped grating of continuously varying period by means of a holographic technique using a photoresist and twisted mirrors, coating the surface of the substrate containing the formed grating with a polyurethane film and diffusing a dye in the prescribed region of the resultant polyurethane film coated on the substrate. In the device of the construction described above, irradiation of the region having the fan-shaped grating with a laser light generates laser light beams whose wavelength is variable with the position at which the laser light impinges upon the region of the grating.

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Inventors: Matsuda, Akihisa (Tokyo, JP)
Iizima, Sigeru (Koganei, JP)

Application Number: 883328
Filing Date: 1978-03-03
Publication_date: 1980-06-17
Assignee: Agency of Industrial Science & Technology, Ministry of International (Tokyo, JP)
Primary Class(es): 372/7 359/1, 359/569, 372/20
Other Classes:
US Patent Ref:

3675157	Jul, 1972	Kaminow et al.	331/94.
3791737	Feb, 1974	Johansson	350/162.
3868589	Feb, 1975	Wang	331/94.
3898585	Aug, 1975	Heidrich et al.	331/94.
3906393	Sep, 1975	Fletcher	331/94.
3970959	Jul, 1976	Wang et al.	331/94.
3972008	Jul, 1976	Fletcher	331/94.
4094575	Jun, 1978	Kellie	350/162.

Other Refs: Other References: Kogelnik et al., Stimulated Emission in a Periodic Structure, Appl. Phys. Lett., vol. 18. No. 4 (Feb. 15, 1971) pp. 152-154.
Schinke et al., Thin-film Distributed-Feedback Laser Fabricated by Ion Milling, Appl. Phys. Lett., vol. 21, No. 10 (Nov. 15, 1972) pp. 494-496.