Fibre-type light conversion device

Details Fibre-type light conversion device Fibre-type light conversion device

1989-05-22

1990-03-20

Lee, John D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

350452, 307427, G02B 634

Patent

active

049095870

ABSTRACT:
A fibre-type light wavelength conversion device comprises a fibre-type wavelength conversion element for changing the wavelength of an incident light and a prismatic means for transforming said incident light, whose wavelength has been changed by said wavelength conversion element, into a parallel light, wherein said prismatic means is a Fresnel lens comprised of a plurality of concentric conical ring zones whose cross-section including its optical axis has a saw-tooth shape or comprised of a same pitch circular grating. Furthermore, a vertical angle of a surface of emergence of said conical ring zones is determined so as to satisfy the following equations of:

REFERENCES:
patent: 4726662 (1988-02-01), Cromack
patent: 4824227 (1989-04-01), Goldenberg et al.

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