Semiconductor ring laser gyro

1. A semiconductor ring laser gyro comprising:

a semiconductor laser for emitting light from each end of the gyro;

at least one reflection prism comprising a plurality of reflection surfaces for forming an optical circuit, the at least one reflection prism adapted to receive and internally reflect the light emitted from the semiconductor laser;

a transmissive mirror disposed at one of the plurality of reflection surfaces of the at least one reflection prism and adapted to transmit part of the light traveling clockwise and part of the light traveling counterclockwise through the optical circuit; and

a beam multiplexing prism for multiplexing the light transmitted through the transmissive mirror.

2. A semiconductor ring laser gyro according to claim 1 , wherein the semiconductor ring laser gyro comprises a plurality of reflection prisms, and at least one of the plurality of reflection prisms is a corner cube prism.

3. A semiconductor ring laser gyro according to claim 1 , wherein the semiconductor ring laser gyro comprises a reflection prism having a plurality of reflection surfaces, and the optical circuit is formed by the plurality of reflection surfaces of the reflection prism.

4. A semiconductor ring laser gyro according to claim 1 , wherein the beam multiplexing prism is bonded to the reflection surface having the transmissive mirror.

5. A semiconductor ring laser gyro according to claim 1 , wherein the reflection prism and the beam multiplexing prism are made of the same material.