Light signal remote control apparatus and light signal level con

Details Light signal remote control apparatus and light signal level con Light signal remote control apparatus and light signal level con

1996-10-01

1998-01-06

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359147, 359173, 359177, 359187, 34082506, H04B 1000

Patent

active

057061122

ABSTRACT:
A remote light signal control apparatus is disclosed wherein the level of the light output thereof is fixed with a high degree of accuracy and, even when an ALC loop is opened, a laser diode can emit light at a stable level to assure a high degree of reliability of the laser diode. A first control section is provided in one of a light reception section and a light transmission section. The light transmission section includes a second light detection section for detecting a light emitting condition of a light source, a second control section for outputting, in response to light detection information detected by the second light detection section, a light control signal for controlling the state of a light signal from the light source, and a switch section for selectively outputting to the light source one of the light control signal from the first control section and the light control signal from the second control section with which the level of the light signal from the light source is controlled lower than that with the other.

REFERENCES:
patent: 5291326 (1994-03-01), Heidemann
patent: 5500756 (1996-03-01), Tsushima et al.
patent: 5539557 (1996-07-01), Horiuchi et al.

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