US 6,618,177 B1 · Light space-transmission device

Abstract

A light space-transmission device includes a light beam transmitting block for modulating a light beam with information signal and for transmitting the light beam, a first luminous-flux-diameter converting part for enlarging the luminous-flux-diameter of the light beam that is sent from the light beam transmitting block and for transmitting the light beam, a second luminous-flux-diameter converting part for enlarging the luminous-flux-diameter of the light beam that is sent from the first luminous-flux-diameter converting part and for transmitting the light beam. An optical-axis correcting portion is inserted into the optical path of the light beam between the first luminous-flux-diameter converting part, and the second luminous-flux-diameter converting part and controls the angle of the optical axis of the light beam thrown to the second luminous-flux-diameter converting part.

Claims8

Dependent claims

A light space-transmission device comprising:

transmitting means for transmitting a light beam modulated with a predetermined information signal to another light space-transmission device spaced at a predetermined distance;
light receiving means for receiving a transmission light transmitted from another light space-transmission device spaced at a predetermined distance as a reception light beam;
a plurality of stationary luminous-flux-diameter converting means for converting the luminous-flux-diameters of said transmission light beam and said reception light beam;
and
optical axis correcting means for controlling the optical axes of said transmission light beam and said reception light beam by changing an angle of reflection of said transmission light beam and said reception light beam from said optical axis correcting means.

2 more elements

Dependencies are inferred from the claim text.

Light space-transmission device

Life of this patent

Light space-transmission device

Life of this patent

Abstract

Claims8